Residential · R07

Attic / Loft Conversion Cost Estimate — 30 m²

30 m² 34 work items 5 sections Toronto, Canada

About This Project

Professional estimate for converting a 40 m² attic or loft into habitable space. Covers structural floor reinforcement, dormer or roof window installation, insulation (walls, floor, roof), staircase, plasterboard lining, electrical wiring, heating extension, flooring, and fire safety compliance including fire door and smoke detection.

Scope of Works

Structural Works (7)Insulation & Boarding (6)Windows & Doors (4)MEP (10)Finishes (7)

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Overview

iKey project metrics at a glance — total cost per m², labor and material shares, and estimated duration
Source: Text Query
C$1,514.71
Cost / m²
30.0%
Labor
32.3%
Materials
133 days
Est. Duration

Work Items

18 items iAdjust quantities or remove items, then recalculate. Click item name to jump to details.
Soil excavation using single-bucket electric dragline excavators with a bucket c4.5m3C$38.37
Construction of reinforced concrete foundations for general use under columns wi2.4m3C$1,078.34
Construction of reinforced concrete columns in wooden formwork with a height of:1.2m3C$976.20
Construction of reinforced concrete floors and slabs up to 200 mm thick in perma1.8m3C$1,602.77
Masonry of external and internal brick walls with an air gap: with a floor heigh5.7m3C$4,086.46
Installation of partitions made of gypsum tongue-and-groove slabs: for floor hei24m2C$3,905.22
Installation of flat roofs from roll roofing waterproofing self-adhesive materia10.5m2C$184.46
Installation of PVC profile window blocks in residential and public buildings: d4.5m2C$1,836.32
Filling balcony openings in wooden log walls with caulking door blocks with door0.9m2C$551.20
Installation of two-color cement mortar coatings made of ceramic tiles: stair la25.5m2C$3,776.30
Installation of a load-bearing suspended ceiling for clean rooms, with panel dim22.5m2C$3,013.01
Continuous leveling of interior surfaces (single-layer plastering) with dry mort48m2C$2,443.07
Improved oil painting of previously painted walls: for two coats with removal of48m2C$1,398.13
Electrical wiring in chambers: cable or wire with band fasteners90mC$482.14
Laying water supply pipelines using multilayer metal-polymer pipes with a diamet18mC$833.62
Laying air ducts made of galvanized sheet steel and aluminum class H (normal) wi30m2C$5,246.89
Repair of plaster on external straight slopes on stone and concrete with decorat15m2C$13,918.70
Preparing the soil for laying a parterre and ordinary lawn with the addition of 3m2C$69.95

Project Context

iInput parameters, location adjustment factors, and detection confidence for this estimate
Source
Office
30 m² · 18 items
SourceText Query
Work Items18 items · 17 Categories
CurrencyC$ CAD
LanguageEnglish
Date05 Apr 2026
Attic / Loft Conversion 30 m² Toronto Canada
Cost / m²
C$1,514.71
30 m²
Est. Duration
4 months
133 days
Overhead
15%
C$5,388.27
Direct Costs
79%
C$35,921.90
Location
Toronto, Canada
Americas
×1.07
Estimate Overview
C$45,441.20
C$1,514.71 / m² · 4 months (133 days)
Labor 30% Materials 32% Equipment 17% Overhead 12% Profit 9%
Contingency (P80)
+8%
C$3,817.06
Budget (P80)
C$49,258.26
recommended
Resources
79
48 mat · 12 lab · 19 equ
Overhead + Profit
12% + 9%
C$9,519.30
Pricing Methodology
Data Source: DDC Pricing DB — English · 55,719 items · CWICR
City Adjustment
🏛 Toronto, Canada
Your city matches the base — coefficients ×1.00
PPP Coefficients
Labor Factor
×
click to adjust
Material Factor
×
click to adjust
Equipment Factor
×
click to adjust
Prices from a professional construction database (55,719 items), adjusted to your city using construction-specific Purchasing Power Parity (PPP). Coefficients can be manually adjusted.
Detection Confidence
50%

Cost Breakdown

iHow the total cost is distributed: labor, materials, equipment, overhead, and profit margins
C$35,921.90Direct Cost
Labor (30%)C$13,623.11
Materials (32%)C$14,663.20
Equipment (17%)C$7,635.59
Overhead (12%)C$5,388.27
Profit (9%)C$4,131.03
Cost / m²
LaborC$454.10
MaterialsC$488.77
EquipmentC$254.52
OverheadC$179.61
ProfitC$137.70
Grand TotalC$1,514.71
Materials / Labor
1.08
Direct Cost %
79.1%
18 work items across 17 categories, 79 resources

Cost Flow

17iVisual flow of the total budget through work categories, showing proportional cost distribution
Total CostC$45,441.20HVAC: C$5,246.89 (11.5%)Doors: C$551.20 (1.2%)Facade: C$13,918.70 (30.6%)Ceiling: C$3,013.01 (6.6%)Roofing: C$184.46 (0.4%)Windows: C$1,836.32 (4.0%)Flooring: C$3,776.30 (8.3%)Painting: C$1,398.13 (3.1%)Plumbing: C$833.62 (1.8%)Earthwork: C$38.37 (0.1%)Structure: C$2,578.97 (5.7%)Electrical: C$482.14 (1.1%)Foundation: C$1,078.34 (2.4%)Plastering: C$2,443.07 (5.4%)Landscaping: C$69.95 (0.2%)External Walls: C$4,086.46 (9.0%)Internal Walls: C$3,905.22 (8.6%)HVAC11.5%Doors1.2%Facade30.6%Ceiling6.6%Roofing0.4%Windows4.0%Flooring8.3%Painting3.1%Plumbing1.8%Earthwork0.1%Structure5.7%Electrical1.1%Foundation2.4%Plastering5.4%Landscaping0.2%External Walls9.0%Internal Walls8.6%
  • Building type not detected; using 'office' template. Use --type to specify.

Categories

17iCost distribution by work category — earthwork, structure, facade, MEP, finishes, etc.
CategoryCostCost / m²Share
HVACC$5,246.89C$174.9011.5%
DoorsC$551.20C$18.371.2%
FacadeC$13,918.70C$463.9630.6%
CeilingC$3,013.01C$100.436.6%
RoofingC$184.46C$6.150.4%
WindowsC$1,836.32C$61.214.0%
FlooringC$3,776.30C$125.888.3%
PaintingC$1,398.13C$46.603.1%
PlumbingC$833.62C$27.791.8%
EarthworkC$38.37C$1.280.1%
StructureC$2,578.97C$85.975.7%
ElectricalC$482.14C$16.071.1%
FoundationC$1,078.34C$35.942.4%
PlasteringC$2,443.07C$81.445.4%
LandscapingC$69.95C$2.330.2%
External WallsC$4,086.46C$136.229.0%
Internal WallsC$3,905.22C$130.178.6%

Top Items

DescriptionTotal
Repair of plaster on external straight slopes on stone …C$13,918.70
Laying air ducts made of galvanized sheet steel and alu…C$5,246.89
Masonry of external and internal brick walls with an ai…C$4,086.46
Installation of partitions made of gypsum tongue-and-gr…C$3,905.22
Installation of two-color cement mortar coatings made o…C$3,776.30

What-If Scenarios

iExplore how changes in material, labor, or equipment costs affect the total project budget
Optimistic (-10%)
C$40,897.08
↓ C$4,544.12 savings
Labor -10% · Materials -10% · Equipment -10%
Base Estimate
C$45,441.20
Deterministic
Labor ×1.00 · Materials ×1.00 · Equipment ×1.00
Pessimistic (+15%)
C$52,257.38
↑ C$6,816.18 increase
Labor +15% · Materials +15% · Equipment +15%
Custom Scenario: Adjust cost components
Labor 0%
Materials 0%
Equipment 0%
Custom Scenario Total Cost
C$45,441.20

Project Schedule

≈4 monthsiProject timeline with critical path method (CPM), Gantt chart, and resource allocation
Construction PhasesAI
Site PreparationSite clearing, temporary facilities setup, utilities connection8d
EarthworkExcavation, grading, soil compaction, utility trenching8d
Foundation WorkConcrete footings, foundation walls, basement slab, waterproofing8d
Structural FrameworkSteel frame erection, concrete floors, structural connections8d
Roofing SystemRoof deck, membrane, insulation, drainage systems8d
External EnvelopeExterior walls, facade systems, building envelope sealing21d
Windows and External DoorsWindow installation, external door systems, glazing8d
MEP Rough-inElectrical conduits, plumbing rough-in, HVAC ductwork installation8d
Internal Walls FramingInterior partition framing, door frames, wall preparation8d
InsulationThermal and acoustic insulation, vapor barriers8d
Drywall and PlasteringDrywall installation, plastering, wall finishing preparation8d
Ceiling SystemsSuspended ceilings, ceiling tiles, lighting fixtures preparation8d
MEP Finish WorkElectrical fixtures, plumbing fixtures, HVAC units and controls8d
Interior DoorsInterior door installation, hardware, access control systems8d
Flooring InstallationCarpet, tile, hardwood, and other finish flooring systems8d
Painting and Final FinishesInterior painting, final wall finishes, trim work8d
Final Systems and TestingSystem commissioning, testing, safety systems, elevators8d
Landscaping and Site WorkExterior landscaping, parking areas, site cleanup8d
Final Inspection and HandoverFinal inspections, punch list completion, project handover8d
4
months
133
days
19
phases
15
Critical Path
6
Peak workers
540
Labor Hours
M1 M2 M3 M4 M5 Crew/Float Site Preparation Site Preparation: 8d, Crew 2, Float 0d 2 / - Earthwork Earthwork: 8d, Crew 2, Float 0d 2 / - Foundation Work Foundation Work: 8d, Crew 2, Float 0d 2 / - Structural Framework Structural Framework: 8d, Crew 2, Float 0d 2 / - Roofing System Roofing System: 8d, Crew 2, Float 93d 2 / 93d External Envelope External Envelope: 21d, Crew 2, Float 0d 21d 2 / - Windows and External … Windows and External Doors: 8d, Crew 2, Float 0d 2 / - MEP Rough-in MEP Rough-in: 8d, Crew 2, Float 33d 2 / 33d Internal Walls Framing Internal Walls Framing: 8d, Crew 2, Float 0d 2 / - Insulation Insulation: 8d, Crew 2, Float 0d 2 / - Drywall and Plastering Drywall and Plastering: 8d, Crew 2, Float 0d 2 / - Ceiling Systems Ceiling Systems: 8d, Crew 2, Float 0d 2 / - MEP Finish Work MEP Finish Work: 8d, Crew 2, Float 0d 2 / - Interior Doors Interior Doors: 8d, Crew 2, Float 8d 2 / 8d Flooring Installation Flooring Installation: 8d, Crew 2, Float 0d 2 / - Painting and Final Fi… Painting and Final Finishes: 8d, Crew 2, Float 0d 2 / - Final Systems and Tes… Final Systems and Testing: 8d, Crew 2, Float 0d 2 / - Landscaping and Site … Landscaping and Site Work: 8d, Crew 2, Float 64d 2 / 64d Final Inspection and … Final Inspection and Handover: 8d, Crew 2, Float 0d 2 / - Workers 45K 50% (38d)
Site PreparationEarthworkFoundation WorkStructural FrameworkRoofing SystemExternal EnvelopeWindows and External DoorsMEP Rough-inInternal Walls FramingInsulationDrywall and PlasteringCeiling SystemsMEP Finish WorkInterior DoorsFlooring InstallationPainting and Final FinishesFinal Systems and TestingLandscaping and Site WorkFinal Inspection and HandoverCumulative Cost
Labor Hours by Phase
External Envelope
215 hours
Flooring Installatio
71 hours
Structural Framework
59 hours
Site Preparation
51 hours
Internal Walls Frami
50 hours
Insulation
50 hours
MEP Finish Work
50 hours
Final Systems and Te
50 hours
Final Inspection and
50 hours
MEP Rough-in
48 hours
Painting and Final F
36 hours
Ceiling Systems
24 hours
Drywall and Plasteri
18 hours
Windows and External
8 hours
Foundation Work
6 hours
Interior Doors
3 hours
Landscaping and Site
1 hours
Roofing System
1 hours
Earthwork
0 hours

Monthly Cash Flow

4 monthsiMonthly cost distribution and cumulative S-curve showing how project spending builds over time
26%
M1
75%
M2
86%
M3
100%
M4
MonthdaysMonthly Cost%Cumulative%
M11–30C$11,661.6725.7%C$11,661.6726%
M231–60C$22,359.4949.2%C$34,021.1675%
M361–90C$4,908.9910.8%C$38,930.1486%
M491–120C$6,511.0114.3%C$45,441.15100%

Daily Cash Flow

17 weeks
1%
D1
9%
D12
11%
D23
40%
D34
60%
D45
73%
D56
75%
D67
76%
D78
85%
D89
89%
D100
98%
D111
100%
D117
WeekdaysWeekly Cost%Cumulative%
W1D1–D7C$3,417.077.5%C$3,417.078%
W2D8–D14C$516.931.1%C$3,933.009%
W3D15–D21C$683.551.5%C$4,617.5510%
W4D22–D28C$3,737.098.2%C$8,354.6418%
W5D29–D35C$11,132.5924.5%C$19,487.2443%
W6D36–D42C$5,575.1912.3%C$25,062.4255%
W7D43–D49C$4,639.5710.2%C$29,701.9965%
W8D50–D56C$3,366.037.4%C$33,068.0273%
W9D57–D63C$1,191.422.6%C$34,259.4475%
W10D64–D70C$0.000.0%C$34,259.4475%
W11D71–D77C$0.000.0%C$34,259.4475%
W12D78–D84C$2,137.694.7%C$36,397.1380%
W13D85–D91C$2,978.546.6%C$39,375.6787%
W14D92–D98C$891.052.0%C$40,266.7289%
W15D99–D105C$1,888.154.2%C$42,154.8793%
W16D106–D112C$2,412.455.3%C$44,567.3298%
W17D113–D117C$873.831.9%C$45,441.15100%

Line Items

18 itemsiDetailed work items grouped by category with quantities, unit prices, and resource breakdown
▼Earthwork 1 items C$38.37
#CodeDescriptionQtyUnitUnit PriceTotal
1KAME_KAME_KAKAME_KALICON
Soil excavation using single-bucket electric dragline excavators with a bucket capacity of: 10 m3, soil group 1
4.5
30 m² × 0.15 = 4.5 m3(Earthwork)
m3C$6.74C$38.37
C$30.33 +15% C$4.55 +10% C$3.49
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 10.01hrsC$146.99C$1.36
Bulldozers, power 79 kW (108 hp)0.01Machine hoursC$43.68C$0.42
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$107.19C$1.05
Single-bucket electric walking excavators with dragline working equipment, bucket capacity 10 m30.01Machine hoursC$2,583.86C$24.89
Personnel: 2 man-hours/machine-hour0.01Machine hoursC$272.19C$2.61
▼Foundation 1 items C$1,078.34
#CodeDescriptionQtyUnitUnit PriceTotal
2KANE_KAME_KAKAME_KAVO
Construction of reinforced concrete foundations for general use under columns with a volume of: up to 25 m3
2.4
30 m² × 0.08 = 2.4 m3(Foundation)
m3C$355.18C$1,078.34
C$852.45 +15% C$127.87 +10% C$98.03
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Average workload TO.KA5.64hrsC$22.53C$127.04
Water0.00m3C$210.19C$1.08
Electricity0.03kWhC$34.42C$1.08
Polyethylene film, thickness KA.MESA mm1.29m2C$70.67C$90.58
Construction nails0.00tC$426,436.09C$102.45
Quicklime, grade I0.00tC$40,773.35C$9.71
Hot-rolled wire in coils, diameter NE.TO-NE.SA mm0.00tC$294,791.95C$71.17
Edged softwood boards, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 44-50 mm, grade III0.01m3C$67,399.34C$420.57
Tower cranes, lifting capacity 8 t0.45Machine hoursC$41.83C$18.75
Personnel: 1 person-hour/machine-hour0.45Machine hoursC$18.08C$8.11
Mobile cranes, lifting capacity 16 t0.01Machine hoursC$66.64C$0.57
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$18.08C$0.16
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t0.01Machine hoursC$69.15C$0.41
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$15.47C$0.10
Deep vibrators0.28Machine hoursC$0.55C$0.16
Flatbed trucks, load capacity up to 5 tons0.01Machine hoursC$25.88C$0.34
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$13.46C$0.18
▼Structure 2 items C$2,578.97
#CodeDescriptionQtyUnitUnit PriceTotal
3KANE_KASA_KAKAME_KASA
Construction of reinforced concrete columns in wooden formwork with a height of: up to 4 m, perimeter up to 3 m
1.2
30 m² × 0.04 = 1.2 m3(Structure)
m3C$643.08C$976.20
C$771.70 +15% C$115.75 +10% C$88.75
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 18.66hrsC$22.75C$197.13
Welding electrodes for welding low-alloy and carbon steels UONI 13/45, E42A, diameter 4-5 mm1.80kgC$159.99C$288.08
Construction nails0.00tC$96,298.60C$23.13
Quicklime, grade I0.00tC$9,207.52C$6.58
Edged softwood beams (spruce, pine), natural moisture content, length RI-NE.SA m, width 20-90 mm, thickness 20-90 mm, grade II0.00m3C$18,406.44C$30.93
Unedged softwood board, natural moisture content, length RI-NE.SA m, width 100-250, thickness 30-50 mm, grade II0.01m3C$11,685.03C$154.15
Tower cranes, lifting capacity 8 t1.09Machine hoursC$42.62C$46.56
Personnel: 1 person-hour/machine-hour1.09Machine hoursC$17.82C$19.46
Mobile cranes, lifting capacity 16 t0.02Machine hoursC$67.89C$1.55
Personnel: 1 person-hour/machine-hour0.02Machine hoursC$17.82C$0.41
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t0.00Machine hoursC$70.45C$0.21
Personnel: 1 person-hour/machine-hour0.00Machine hoursC$15.25C$0.04
Deep vibrators0.47Machine hoursC$0.56C$0.27
Flatbed trucks, load capacity up to 5 tons0.03Machine hoursC$26.37C$0.90
Personnel: 1 person-hour/machine-hour0.03Machine hoursC$13.26C$0.45
Welding machines for manual arc welding, welding current up to 350 A1.26Machine hoursC$1.47C$1.85
4KANE_MEDX_KAKAPU_KAME
Construction of reinforced concrete floors and slabs up to 200 mm thick in permanent formwork (concrete supplied in buck
1.8
30 m² × 0.06 = 1.8 m3(Structure)
m3C$703.90C$1,602.77
C$1,267.01 +15% C$190.05 +10% C$145.71
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 115.00hrsC$23.00C$360.06
Anthracene oil0.00tC$33,391.11C$108.07
Water0.00m3C$54.43C$0.28
Electricity0.07kWhC$8.91C$0.56
Polyethylene film, thickness KA.MESA mm0.77m2C$18.30C$14.24
Construction nails0.00tC$110,430.33C$19.83
Light wire, diameter ME.ME mm0.00tC$112,477.98C$40.49
Edged coniferous timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 20-90 mm, thickness 20-90 mm, grade III0.02m3C$21,107.57C$471.11
Edged softwood board, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 25 mm, grade III0.00m3C$17,453.80C$50.27
Edged softwood boards, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 44-50 mm, grade III0.01m3C$17,453.80C$163.37
Tower cranes, lifting capacity 8 t0.49Machine hoursC$42.51C$20.66
Personnel: 1 person-hour/machine-hour0.49Machine hoursC$19.02C$9.24
Mobile cranes, lifting capacity 16 t0.03Machine hoursC$67.71C$1.77
Personnel: 1 person-hour/machine-hour0.03Machine hoursC$19.02C$0.50
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t0.05Machine hoursC$70.27C$3.37
Personnel: 1 person-hour/machine-hour0.05Machine hoursC$16.28C$0.78
Deep vibrators0.73Machine hoursC$0.56C$0.41
Trucks, load capacity up to 8 tons0.04Machine hoursC$37.17C$1.45
Personnel: 1 person-hour/machine-hour0.04Machine hoursC$14.16C$0.56
▼External Walls 1 items C$4,086.46
#CodeDescriptionQtyUnitUnit PriceTotal
5KAVO_KARI_KAMESA_KARICON
Masonry of external and internal brick walls with an air gap: with a floor height of more than 4 m
5.7
30 m² × 0.19 = 5.7 m3(External Walls)
m3C$566.74C$4,086.46
C$3,230.41 +15% C$484.56 +10% C$371.50
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 131.69hrsC$63.88C$2,024.37
Water1.43m3C$774.22C$1,104.27
Tower cranes, lifting capacity 8 t1.48Machine hoursC$19.28C$28.58
Personnel: 1 person-hour/machine-hour1.48Machine hoursC$49.38C$73.19
▼Internal Walls 1 items C$3,905.22
#CodeDescriptionQtyUnitUnit PriceTotal
6KAVO_KAPU_KAKAME_RITO
Installation of partitions made of gypsum tongue-and-groove slabs: for floor heights over 4 m, in 2 layers 80 mm thick,
24.0
30 m² × 0.8 = 24 m2(Internal Walls)
m2C$128.63C$3,905.22
C$3,087.14 +15% C$463.07 +10% C$355.02
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Grade 1 worker8.75hrsC$20.29C$177.56
2nd grade worker21.07hrsC$22.12C$466.03
Grade 4 worker19.68hrsC$27.20C$535.30
Grade 3 worker0.15hrsC$24.15C$3.59
Water0.07m3C$55.38C$3.98
Electricity0.13kWhC$9.07C$1.14
Plastic dowels with screws, diameter 10 mm, length 50-60 mm, screw diameter 6 mm, screw length 50-80 mm0.08100 pcsC$951.53C$75.30
Galvanized steel rack profile, dimensions 50x50 mm, thickness KA.NE mm12.00mC$131.29C$1,575.61
Hot-rolled reinforcing steel with periodic profile, class A-III, diameter 8 mm0.00tC$78,866.97C$189.24
Tower cranes, lifting capacity 8 t0.55Machine hoursC$42.66C$23.44
Personnel: 1 person-hour/machine-hour0.55Machine hoursC$19.39C$10.66
Mobile cranes, lifting capacity 16 t0.19Machine hoursC$67.96C$12.89
Personnel: 1 person-hour/machine-hour0.19Machine hoursC$19.39C$3.68
Flatbed trucks, load capacity up to 5 tons0.21Machine hoursC$26.39C$5.64
Personnel: 1 person-hour/machine-hour0.21Machine hoursC$14.43C$3.08
▼Roofing 1 items C$184.46
#CodeDescriptionQtyUnitUnit PriceTotal
7MERI_KAME_KAKARI_MERI
Installation of flat roofs from roll roofing waterproofing self-adhesive materials with anti-adhesion film: with heating
10.5
30 m² × 0.35 = 10.5 m2(Roofing)
m2C$13.89C$184.46
C$145.82 +15% C$21.87 +10% C$16.77
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 10.93hrsC$24.33C$22.59
Propane-butane technical mixture0.22kgC$551.72C$122.47
Mobile cranes, lifting capacity 16 t0.01Machine hoursC$65.85C$0.34
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$19.05C$0.10
Single-mast hoists, load capacity up to 500 kg, lifting height 15 m0.00Machine hoursC$1.72C$0.01
Personnel: 1 person-hour/machine-hour0.00Machine hoursC$12.60C$0.04
Flatbed trucks, load capacity up to 5 tons0.01Machine hoursC$25.57C$0.16
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$14.18C$0.09
Gas injection burners0.04Machine hoursC$0.39C$0.02
▼Windows 1 items C$1,836.32
#CodeDescriptionQtyUnitUnit PriceTotal
8MEKA_KAME_KATOPU_KAME
Installation of PVC profile window blocks in residential and public buildings: deaf with an opening area of up to 2 m2
4.5
30 m² × 0.15 = 4.5 m2(Windows)
m2C$322.59C$1,836.32
C$1,451.64 +15% C$217.75 +10% C$166.94
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 17.53hrsC$25.69C$193.47
Electricity0.51kWhC$4.07C$2.04
Waterproofing tapes, vapor-permeable butyl rubber, made of non-woven membrane-type material, with adhesive coating on the inner edges and anti-adhesive coating, beige color, width 80 mm18.81mC$22.29C$419.27
Pre-compressed self-expanding polyurethane foam sealing strips with adhesive layer on one side, width 10 mm, thickness when compressed 4 mm, thickness when expanded 20 mm0.9610 mC$145.31C$139.93
Polyurethane foam sealant (assembly foam), universal, volume 1000 ml3.10pcsC$164.81C$511.74
Steel frame mounting dowels, diameter 10 mm, length 130 (132) mm1.3810 pcsC$66.44C$91.46
Plastic mounting wedges0.36100 pcsC$239.61C$86.23
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m0.08Machine hoursC$2.53C$0.20
Personnel: 1 person-hour/machine-hour0.08Machine hoursC$13.31C$1.05
Flatbed trucks, load capacity up to 5 tons0.15Machine hoursC$27.44C$4.05
Personnel: 1 person-hour/machine-hour0.15Machine hoursC$14.97C$2.21
▼Doors 1 items C$551.20
#CodeDescriptionQtyUnitUnit PriceTotal
9MEKA_KAME_KAPURI_KARI
Filling balcony openings in wooden log walls with caulking door blocks with door leaves: paired, opening area over 3 m2
0.9
30 m² × 0.03 = 0.9 m2(Doors)
m2C$484.14C$551.20
C$435.73 +15% C$65.36 +10% C$50.11
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 12.66hrsC$27.56C$73.42
Water0.01m3C$89.27C$0.46
Electricity0.07kWhC$14.62C$0.92
Resin-impregnated tow0.96kgC$273.96C$263.81
Self-tapping steel screws, oxidized, with countersunk head and cross-shaped slot, pointed, diameter 8 mm, length 100 mm0.00tC$270,016.49C$24.27
Edged coniferous timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 20-90 mm, thickness 20-90 mm, grade III0.00m3C$34,618.39C$71.45
Flatbed trucks, load capacity up to 5 tons0.03Machine hoursC$26.06C$0.90
Personnel: 1 person-hour/machine-hour0.03Machine hoursC$14.41C$0.50
▼Flooring 1 items C$3,776.30
#CodeDescriptionQtyUnitUnit PriceTotal
10MEME_KAME_KASAVO_KARI
Installation of two-color cement mortar coatings made of ceramic tiles: stair landings
25.5
30 m² × 0.85 = 25.5 m2(Flooring)
m2C$117.07C$3,776.30
C$2,985.22 +15% C$447.78 +10% C$343.30
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 171.25hrsC$26.60C$1,895.40
Electricity3.32kWhC$2.25C$7.47
Colored cotton rags0.13kgC$28.31C$3.59
Ready-mixed masonry mortar, cement, M1500.65m3C$1,641.50C$1,067.39
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t0.07Machine hoursC$72.10C$4.78
Personnel: 1 person-hour/machine-hour0.07Machine hoursC$17.18C$1.14
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m0.07Machine hoursC$2.49C$0.17
Personnel: 1 person-hour/machine-hour0.07Machine hoursC$13.28C$0.88
Flatbed trucks, load capacity up to 5 tons0.10Machine hoursC$26.98C$2.83
Personnel: 1 person-hour/machine-hour0.10Machine hoursC$14.95C$1.57
▼Ceiling 1 items C$3,013.01
#CodeDescriptionQtyUnitUnit PriceTotal
11MESA_KAME_MEKATO_KAME
Installation of a load-bearing suspended ceiling for clean rooms, with panel dimensions of 1240x1240 mm
22.5
30 m² × 0.75 = 22.5 m2(Ceiling)
m2C$105.86C$3,013.01
C$2,381.83 +15% C$357.27 +10% C$273.91
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Grade 1 worker0.90hrsC$30.22C$27.06
2nd grade worker1.04hrsC$32.94C$34.24
Grade 4 worker6.75hrsC$40.51C$273.56
Grade 5 worker8.16hrsC$46.55C$379.66
Grade 6 worker6.58hrsC$54.41C$357.94
Rectified technical ethyl alcohol, grade I0.81kgC$60.02C$48.62
Electricity0.15kWhC$0.48C$0.08
Butyl rubber waterproofing sealing tape, with adhesive layer on both sides, black, width 15 mm, thickness ME.SA mm4.9510 mC$6.36C$31.49
Stainless steel anchor screws with hexagonal head, diameter 6 mm, length 35 mm0.11100 pcsC$2,074.49C$228.71
Galvanized steel hex nuts, thread diameter M8 (M10)0.36kgC$10.06C$3.62
Threaded steel pin, thread diameter M10, length 2000 mm11.03pcsC$5.45C$60.06
Flat cutting disc, dimensions 230x3x22 mm0.03pcsC$4.76C$0.15
Drill bit with carbide tip, SDS-plus shank for hammer drilling holes in hard materials, total length 160 mm, diameter 6 mm0.03pcsC$4.54C$0.12
Steel height adjuster for suspended ceilings, hole for stud with diameter M10, dimensions 64x50x83 mm11.03pcsC$53.44C$589.13
Steel rack plug for suspended ceiling support profile, dimensions 100x4000 mm10.21pcsC$31.82C$325.07
Mobile cranes, lifting capacity 16 t0.13Machine hoursC$100.29C$13.31
Personnel: 1 person-hour/machine-hour0.13Machine hoursC$28.87C$3.83
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m0.07Machine hoursC$3.59C$0.24
Personnel: 1 person-hour/machine-hour0.07Machine hoursC$19.10C$1.30
Flatbed trucks, load capacity up to 10 tons0.05Machine hoursC$55.91C$2.65
Personnel: 1 person-hour/machine-hour0.05Machine hoursC$21.49C$1.01
▼Plastering 1 items C$2,443.07
#CodeDescriptionQtyUnitUnit PriceTotal
12NEME_KAME_KAKAME_KADX
Continuous leveling of interior surfaces (single-layer plastering) with dry mortar mixtures up to 10 mm thick for subseq
48.0
30 m² × 1.6 = 48 m2(Plastering)
m2C$40.23C$2,443.07
C$1,931.28 +15% C$289.69 +10% C$222.10
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Average work load RI.DX17.20hrsC$23.34C$401.49
Water0.24m3C$6,184.98C$1,523.16
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t0.01Machine hoursC$67.78C$0.65
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$16.17C$0.16
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m0.10Machine hoursC$2.34C$0.24
Personnel: 1 person-hour/machine-hour0.10Machine hoursC$12.50C$1.26
Mobile mortar mixers, drum capacity 65 l0.34Machine hoursC$0.15C$0.06
Personnel: 1 person-hour/machine-hour0.34Machine hoursC$12.50C$4.26
▼Painting 1 items C$1,398.13
#CodeDescriptionQtyUnitUnit PriceTotal
13NERI_KAME_KAKALI_KANE
Improved oil painting of previously painted walls: for two coats with removal of old paint over 35%
48.0
30 m² × 1.6 = 48 m2(Painting)
m2C$23.03C$1,398.13
C$1,105.25 +15% C$165.79 +10% C$127.10
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 136.33hrsC$28.78C$1,045.75
Pumice0.69kgC$48.72C$33.67
Two-layer sanding paper with a grain size of 40-250.53m2C$10.33C$5.45
Colored cotton rags0.09kgC$1.21C$0.11
Combined drying oil for diluting thick oil paints and for exterior work on wooden surfaces0.00tC$1,013.12C$4.86
Adhesive filler0.02tC$549.01C$13.18
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m0.05Machine hoursC$2.84C$0.13
Personnel: 1 person-hour/machine-hour0.05Machine hoursC$15.09C$0.72
Flatbed trucks, load capacity up to 5 tons0.03Machine hoursC$30.83C$0.89
Personnel: 1 person-hour/machine-hour0.03Machine hoursC$16.98C$0.49
▼Electrical 1 items C$482.14
#CodeDescriptionQtyUnitUnit PriceTotal
14KAVO_KASA_KAPUME_KAMEm
Electrical wiring in chambers: cable or wire with band fasteners
90.0
30 m² × 3 = 90 m(Electrical)
mC$4.23C$482.14
C$381.14 +15% C$57.17 +10% C$43.83
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 112.65hrsC$26.69C$337.76
Electricity0.86kWhC$0.30C$0.26
Plastic mounting tapes for wire bundling, fastened with plastic buttons, width 10 mm0.2710 mC$2.51C$0.68
Polypropylene expansion anchors0.92100 pcsC$2.18C$2.00
Copper cable lugs for electrical installations0.02100 pcsC$540.26C$9.73
Mobile cranes, lifting capacity 16 t0.23Machine hoursC$65.71C$14.78
Personnel: 1 person-hour/machine-hour0.23Machine hoursC$19.02C$4.28
Non-tipping wagons, capacity TO.TO m30.28Machine hoursC$0.83C$0.23
Flatbed trucks, load capacity up to 10 tons0.23Machine hoursC$36.63C$8.24
Personnel: 1 person-hour/machine-hour0.23Machine hoursC$14.16C$3.18
▼Plumbing 1 items C$833.62
#CodeDescriptionQtyUnitUnit PriceTotal
15MENE_KATO_KAKARI_KARI
Laying water supply pipelines using multilayer metal-polymer pipes with a diameter of: 20 mm
18.0
30 m² × 0.6 = 18 m(Plumbing)
mC$36.61C$833.62
C$658.99 +15% C$98.85 +10% C$75.78
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 118.54hrsC$27.31C$506.38
Water0.08m3C$114.81C$9.42
Electricity0.43kWhC$18.80C$8.25
Corrugated protective pipes1.98mC$66.31C$131.36
Tower cranes, lifting capacity 8 t0.01Machine hoursC$41.82C$0.30
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$19.18C$0.14
Mobile cranes, lifting capacity 16 t0.01Machine hoursC$66.62C$0.36
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$19.18C$0.10
Flatbed trucks, load capacity up to 5 tons0.07Machine hoursC$25.87C$1.72
Personnel: 1 person-hour/machine-hour0.07Machine hoursC$14.28C$0.95
▼HVAC 1 items C$5,246.89
#CodeDescriptionQtyUnitUnit PriceTotal
16RIKA_KAME_KAKAME_RIME
Laying air ducts made of galvanized sheet steel and aluminum class H (normal) with a thickness of: ME.RI mm, diameter 16
30.0
30 m² × 1 = 30 m2(HVAC)
m2C$138.26C$5,246.89
C$4,147.73 +15% C$622.16 +10% C$476.99
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 115.84hrsC$24.61C$389.82
Welding electrodes for welding low-alloy and carbon steels UONI 13/45, E42A, diameter 4-5 mm0.10kgC$482.04C$47.69
Bolts with nuts and washers for construction2.94kgC$675.59C$1,986.20
Rubber gaskets (pressed technical plate)2.28kgC$750.79C$1,711.79
Mobile cranes, lifting capacity 16 t0.08Machine hoursC$67.06C$5.23
Personnel: 1 person-hour/machine-hour0.08Machine hoursC$19.27C$1.50
Manual and lever winches with a pulling force of TOME.TODX kN (TO.RI t)2.64Machine hoursC$0.14C$0.38
Electric winches with a pulling force of MEDX.NERI kN (2 t)0.02Machine hoursC$0.72C$0.02
Flatbed trucks, load capacity up to 5 tons0.11Machine hoursC$26.04C$2.97
Personnel: 1 person-hour/machine-hour0.11Machine hoursC$14.34C$1.64
Welding machines for manual arc welding, welding current up to 350 A0.34Machine hoursC$1.45C$0.49
▼Facade 1 items C$13,918.70
#CodeDescriptionQtyUnitUnit PriceTotal
17NEME_KATO_KAKAPU_KADX
Repair of plaster on external straight slopes on stone and concrete with decorative mortar: from telescopic towers
15.0
30 m² × 0.5 = 15 m2(Facade)
m2C$733.53C$13,918.70
C$11,002.93 +15% C$1,650.44 +10% C$1,265.34
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 1135.76hrsC$18.59C$2,523.82
Water0.05m3C$0.57C$0.03
Plaster mortar, lime, M1000.51m3C$58.63C$29.99
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket KA.PUNE m3, load capacity 1 t0.40Machine hoursC$28.74C$11.38
Personnel: 1 person-hour/machine-hour0.40Machine hoursC$10.09C$3.99
Self-propelled telescopic lifts, working height 26 m, load capacity 250 kg79.00Machine hoursC$93.20C$7,362.77
Personnel: 1 person-hour/machine-hour79.00Machine hoursC$13.56C$1,070.94
▼Landscaping 1 items C$69.95
#CodeDescriptionQtyUnitUnit PriceTotal
18PULI_KAME_KAPUNE_KAPU
Preparing the soil for laying a parterre and ordinary lawn with the addition of 15 cm of topsoil: manually
3.0
30 m² × 0.1 = 3 m2(Landscaping)
m2C$18.43C$69.95
C$55.30 +15% C$8.29 +10% C$6.36
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Average workload RI.RI1.20hrsC$22.27C$26.72
Preparing the soil for laying a parterre and ordinary lawn with the addition of 3.00m2C$9.53C$28.58
Cost Summary
Direct Cost79%C$35,921.90
Overhead+15%C$5,388.27
Profit+10%C$4,131.03
Grand TotalC$45,441.20

Resource Summary

79 resourcesiAggregated materials, labor, and equipment needed for the entire project
Materials to Order (48)
ResourceUnitQtyUnit PriceCost
Waterm31.89C$1,395.51C$2,642.68
Bolts with nuts and washers for constructionkg2.94C$675.58C$1,986.20
Rubber gaskets (pressed technical plate)kg2.28C$750.79C$1,711.79
Galvanized steel rack profile, dimensions 50x50 mm, thickness KA.NE mmm12.00C$131.30C$1,575.61
Ready-mixed masonry mortar, cement, M150m30.65C$1,641.63C$1,067.39
Steel height adjuster for suspended ceilings, hole for stud with diamepcs11.03C$53.44C$589.13
Edged softwood boards, natural moisture content, length RI-NE.SA m, wim30.02C$37,432.05C$583.94
Edged coniferous timber (spruce, pine), natural moisture content, lengm30.02C$22,236.07C$542.56
Polyurethane foam sealant (assembly foam), universal, volume 1000 mlpcs3.10C$164.81C$511.74
Waterproofing tapes, vapor-permeable butyl rubber, made of non-woven mm18.81C$22.29C$419.27
Welding electrodes for welding low-alloy and carbon steels UONI 13/45,kg1.90C$176.81C$335.77
Steel rack plug for suspended ceiling support profile, dimensions 100xpcs10.21C$31.82C$325.07
Resin-impregnated towkg0.96C$273.95C$263.81
Stainless steel anchor screws with hexagonal head, diameter 6 mm, leng100 pcs0.11C$2,073.53C$228.71
Hot-rolled reinforcing steel with periodic profile, class A-III, diamet0.00C$78,850.00C$189.24
Unedged softwood board, natural moisture content, length RI-NE.SA m, wm30.01C$11,678.03C$154.15
Construction nailst0.00C$242,350.00C$145.41
Pre-compressed self-expanding polyurethane foam sealing strips with ad10 m0.96C$145.31C$139.93
Corrugated protective pipesm1.98C$66.34C$131.36
Propane-butane technical mixturekg0.22C$552.91C$122.47
Anthracene oilt0.00C$33,771.88C$108.07
Polyethylene film, thickness KA.MESA mmm22.06C$50.92C$104.82
Steel frame mounting dowels, diameter 10 mm, length 130 (132) mm10 pcs1.38C$66.42C$91.46
Plastic mounting wedges100 pcs0.36C$239.53C$86.23
Plastic dowels with screws, diameter 10 mm, length 50-60 mm, screw dia100 pcs0.08C$950.76C$75.30
Hot-rolled wire in coils, diameter NE.TO-NE.SA mmt0.00C$355,850.00C$71.17
Threaded steel pin, thread diameter M10, length 2000 mmpcs11.03C$5.45C$60.06
Edged softwood board, natural moisture content, length RI-NE.SA m, widm30.00C$17,334.48C$50.27
Rectified technical ethyl alcohol, grade Ikg0.81C$60.02C$48.62
Light wire, diameter ME.ME mmt0.00C$101,225.00C$40.49
Grand TotalC$14,663.23
Labor Requirements (12)
ResourceUnitQtyUnit PriceCost
Worker Category 1hrs356.88C$26.82C$9,571.33
Personnel: 1 person-hour/machine-hourMachine hours86.08C$14.39C$1,238.98
Grade 4 workerhrs26.43C$30.60C$808.86
2nd grade workerhrs22.11C$22.63C$500.27
Average work load RI.DXhrs17.20C$23.34C$401.49
Grade 5 workerhrs8.16C$46.55C$379.66
Grade 6 workerhrs6.58C$54.41C$357.94
Grade 1 workerhrs9.65C$21.21C$204.62
Average workload TO.KAhrs5.64C$22.52C$127.04
Average workload RI.RIhrs1.20C$22.27C$26.72
Grade 3 workerhrs0.15C$24.13C$3.59
Personnel: 2 man-hours/machine-hourMachine hours0.01C$271.88C$2.61
Grand TotalC$13,623.11
Equipment Requirements (19)
ResourceUnitQtyUnit PriceCost
Self-propelled telescopic lifts, working height 26 m, load capacity 25Machine hours79.00C$93.20C$7,362.77
Tower cranes, lifting capacity 8 tMachine hours4.07C$34.01C$138.29
Mobile cranes, lifting capacity 16 tMachine hours0.69C$73.23C$50.80
Single-bucket electric walking excavators with dragline working equipmMachine hours0.01C$2,592.71C$24.89
Flatbed trucks, load capacity up to 5 tonsMachine hours0.76C$26.73C$20.40
Universal front-end pneumatic wheeled single-bucket loaders, nominal cMachine hours0.40C$28.74C$11.38
Flatbed trucks, load capacity up to 10 tonsMachine hours0.27C$39.99C$10.89
Universal front-end pneumatic wheeled single-bucket loaders, nominal cMachine hours0.13C$70.93C$9.42
Welding machines for manual arc welding, welding current up to 350 AMachine hours1.60C$1.46C$2.34
Trucks, load capacity up to 8 tonsMachine hours0.04C$37.08C$1.45
Single-mast hoists, load capacity up to 500 kg, lifting height 45 mMachine hours0.36C$2.71C$0.98
Deep vibratorsMachine hours1.48C$0.57C$0.84
Bulldozers, power 79 kW (108 hp)Machine hours0.01C$43.75C$0.42
Manual and lever winches with a pulling force of TOME.TODX kN (TO.RI tMachine hours2.64C$0.14C$0.38
Non-tipping wagons, capacity TO.TO m3Machine hours0.28C$0.82C$0.23
Mobile mortar mixers, drum capacity 65 lMachine hours0.34C$0.18C$0.06
Gas injection burnersMachine hours0.04C$0.48C$0.02
Electric winches with a pulling force of MEDX.NERI kN (2 t)Machine hours0.02C$0.83C$0.02
Single-mast hoists, load capacity up to 500 kg, lifting height 15 mMachine hours0.00C$3.12C$0.01
Grand TotalC$7,635.59

Material Alternatives

iAlternative materials with approximate price difference. Percentages show material cost change relative to the current specification.
Installation of PVC profile window blocks in residentiaC$1,250.66
Triple-glazed PVC+35%Aluminum frame+25%Timber frame+45%
Installation of two-color cement mortar coatings made oC$1,078.46
Vinyl/LVT-35%Natural stone+100%Polished concrete-30%
Construction of reinforced concrete floors and slabs upC$868.21
High-strength concrete+20%Lightweight concrete+15%Recycled aggregate-10%
Construction of reinforced concrete foundations for genC$696.63
High-strength concrete+20%Lightweight concrete+15%Recycled aggregate-10%
Construction of reinforced concrete columns in wooden fC$502.87
High-strength concrete+20%Lightweight concrete+15%Recycled aggregate-10%
Laying water supply pipelines using multilayer metal-poC$149.03
Copper pipe+120%PEX pipe-15%Stainless steel+200%

Risk Analysis

Monte Carlo · 10KiMonte Carlo simulation (10,000 iterations) showing completion probability at different confidence levels
144days
P50
50% probability the project finishes within this timeframe. Median scenario based on Monte Carlo simulation.
149days
P80
80% probability — recommended planning basis. Accounts for common delays and uncertainties.
154days
P95
95% probability — conservative estimate. Covers nearly all risk scenarios including severe delays.
+16days
Buffer
Recommended time buffer to add to the deterministic schedule. Covers typical construction uncertainties.
Base Cost (P50)
C$45,441.20
Budget (P80)
C$47,163.18
Maximum (P95)
C$48,813.42
Contingency
+3.8%
Recommended cost reserve based on schedule risk analysis — C$1,721.98
Recommended Budget: C$47,163.18
Deterministic 133 days
P50 144 days
P80 149 days
P95 154 days
P50 P80 P95
Based on Monte Carlo simulation with 10,000 iterations using PERT distribution for each phase duration.
Peak: 6
540 man-hours
15 crit. phases

Cost Risk Analysis

Monte Carlo · 10,000 iterations

Monte Carlo simulation of construction cost uncertainty

Cost Percentiles

C$56,620.03
P10
C$57,376.84
P25
C$58,291.11
P50
C$59,539.19
P80
C$60,171.33
P90

Cumulative Probability (S-Curve)

+2.1%
Recommended Contingency (P80 − P50)
Reserve to cover likely cost overruns with 80% confidence — C$1,248.07

Top Risk Drivers

CategoryWork ItemRisk Share
FacadeRepair of plaster on external straight slopes on s
65.0%
HVACLaying air ducts made of galvanized sheet steel an
16.2%
External WallsMasonry of external and internal brick walls with
5.1%
Internal WallsInstallation of partitions made of gypsum tongue-a
4.6%
FlooringInstallation of two-color cement mortar coatings m
2.7%
CeilingInstallation of a load-bearing suspended ceiling f
1.7%
PlasteringContinuous leveling of interior surfaces (single-l
1.1%
WindowsInstallation of PVC profile window blocks in resid
1.0%

Sensitivity Analysis

±10%iImpact of ±10% change in each cost component on the total project cost

This tornado chart shows how a ±10% change in each cost category affects the total estimate. The wider the bar, the greater the cost impact — helping identify which cost drivers carry the most risk and where tighter cost control may be needed.

Decrease ← → IncreaseImpact
Materials32% of total
±C$1,466.32±3.2%
Labor30% of total
±C$1,362.31±3.0%
Equipment17% of total
±C$763.56±1.7%
Overhead12% of total
±C$538.83±1.2%
Profit9% of total
±C$413.10±0.9%

Cost Summary

iFinal cost breakdown with direct costs, overhead, profit, and grand total
LaborC$13,623.1130%
MaterialsC$14,663.2032%
EquipmentC$7,635.5917%
Direct CostC$35,921.90
OverheadC$5,388.2712%
ProfitC$4,131.039%
Grand TotalC$45,441.20100%
EUR equivalent€28.347,60
USD equivalent$32,670.61
GBP equivalent£24,734.13

Estimate Classification

AACE 18R-97

AACE International Recommended Practice 18R-97

3
ClassClass 3
Typical PurposeBudget Authorization
Expected Accuracy Range: -20% / +30%
Project Definition Level: 10–40%

Cost Benchmark

Office · North America

Comparison of estimated cost/m² against market reference ranges

Low
1,800
▲ Typical
2,500
High
3,800
▼ Your Estimate
965 EUR/m²
Significantly below range · 0.39x ratio to typical

Methodology & Assumptions

iCalculation methodology, data sources, and key assumptions underlying this estimate
Data SourceDDC Pricing DB — English
Confidence Level50%
Overhead Rate15%
Profit Rate10%
Items Matched18
Assumptions
  • Costs adjusted by location-specific labor, material, and equipment factors
  • Exchange rates are offline reference rates and may differ from market rates
  • All amounts exclude VAT / sales tax
  • This estimate is for preliminary budgeting only — not a binding quotation
Included in Estimate
  • All labor, materials, and equipment per defined scope
  • Overhead and profit margins as specified
  • Location-adjusted pricing factors applied
Excluded from Estimate
  • VAT / sales tax
  • Permits, licenses, and legal fees
  • Temporary works and site facilities
  • Design and engineering fees
Prices current as of 2026-03-16 · No cost escalation or inflation adjustment applied
DDC Toolkit · Generated 2026-03-16 16:40 · This estimate is for preliminary budgeting purposes only.

Frequently Asked Questions

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The cost depends on your location, materials chosen, and project scope. Use our calculator with your specific city to get an instant estimate based on 34 verified work items from our database of 55,719 construction prices.
What work items are included in this estimate?
This BOQ includes 34 work items covering Structural Works, Insulation & Boarding, Windows & Doors, MEP, Finishes. Each item is matched to unit rates from our verified pricing database spanning 9 languages and 36 locations worldwide.
How long does Attic / Loft Conversion take?
Duration depends on project size and complexity. A typical 30 m² project takes approximately 5 weeks. Our calculator generates a detailed Gantt chart with phase-by-phase scheduling.
How accurate is this estimate?
Our estimates use verified construction pricing data with location-specific adjustments (PPP factors). The Monte Carlo simulation provides P10-P90 confidence intervals. For formal budgeting, we recommend a Class 3 AACE estimate with local contractor quotes.
What does a attic / loft conversion include?
Professional estimate for converting a 40 m² attic or loft into habitable space. Covers structural floor reinforcement, dormer or roof window installation, insulation (walls, floor, roof), staircase, plasterboard lining, electrical wiring, heating extension, flooring, and fire safety compliance including fire door and smoke detection.

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