Cost estimate for a 30 m² ground-floor house extension. Covers foundation underpinning or new strip footing, structural opening in existing wall (RSJ/steel beam), masonry or timber frame walls, flat or pitched roof, matching exterior finishes, MEP extension, interior finishing, and building control compliance.
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
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click to adjust
Material Factor
×
click to adjust
Equipment Factor
×
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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$16,875.39Direct Cost
Labor (22%)C$4,809.77
Materials (56%)C$11,886.74
Equipment (1%)C$178.88
Overhead (12%)C$2,531.30
Profit (9%)C$1,940.66
Cost / m²
Labor
C$192.39
Materials
C$475.47
Equipment
C$7.16
Overhead
C$101.25
Profit
C$77.63
Grand Total
C$853.89
Materials / Labor
2.47
Direct Cost %
79.1%
16 work items across 16 categories, 54 resources
Cost Flow
16iVisual flow of the total budget through work categories, showing proportional cost distribution
Categories
16iCost distribution by work category — earthwork, structure, facade, MEP, finishes, etc.
Category
Cost
Cost / m²
Share
Doors
C$459.33
C$18.37
2.2%
Heating
C$523.28
C$20.93
2.5%
Roofing
C$534.43
C$21.38
2.5%
Windows
C$1,224.21
C$48.97
5.7%
Bathroom
C$52.25
C$2.09
0.2%
Flooring
C$542.69
C$21.71
2.5%
Painting
C$199.09
C$7.96
0.9%
Plumbing
C$926.24
C$37.05
4.3%
Earthwork
C$44.03
C$1.76
0.2%
Structure
C$1,113.03
C$44.52
5.2%
Electrical
C$401.79
C$16.07
1.9%
Foundation
C$579.45
C$23.18
2.7%
Insulation
C$1,832.32
C$73.29
8.6%
Plastering
C$2,035.89
C$81.44
9.5%
External Walls
C$3,801.28
C$152.05
17.8%
Internal Walls
C$7,078.03
C$283.12
33.2%
Top Items
Description
Total
Limestone partition wall masonry: unreinforced with a f…
C$7,078.03
Masonry of external and internal brick walls with an ai…
C$3,801.28
Continuous leveling of interior surfaces (single-layer …
C$2,035.89
Insulation of interior walls on wood with spray guns us…
C$1,832.32
Installation of PVC profile window blocks in residentia…
C$1,224.21
What-If Scenarios
iExplore how changes in material, labor, or equipment costs affect the total project budget
Optimistic (-10%)
C$19,212.61
↓ C$2,134.74 savings
Labor -10% · Materials -10% · Equipment -10%
Base Estimate
C$21,347.35
Deterministic
Labor ×1.00 · Materials ×1.00 · Equipment ×1.00
Pessimistic (+15%)
C$24,549.45
↑ C$3,202.10 increase
Labor +15% · Materials +15% · Equipment +15%
Custom Scenario: Adjust cost components
Labor0%
Materials0%
Equipment0%
Custom Scenario Total Cost
C$21,347.35
Clicking Apply will update PPP coefficients and recalculate all line items
Project Schedule
≈3 monthsiProject timeline with critical path method (CPM), Gantt chart, and resource allocation
Construction PhasesAI
Site PreparationSite clearing, temporary facilities setup, access roads8d
MEP FinishFinal electrical, plumbing, and HVAC connections8d
Painting and FinishesInterior and exterior painting, final trim work8d
Final Cleanup and HandoverFinal cleaning, inspections, punch list completion8d
3
months
96
days
16
phases
12
Critical Path
6
Peak workers
157
Labor Hours
Site PreparationEarthworksFoundationStructural FrameworkRoofingExternal WallsWindows and Exterior DoorsMEP Rough-inInsulationDrywall and PlasteringInterior DoorsFlooringBathroom FixturesMEP FinishPainting and FinishesFinal Cleanup and HandoverCumulative Cost
Labor Hours by Phase
External Walls
50 hours
MEP Finish
50 hours
Final Cleanup and Ha
50 hours
MEP Rough-in
47 hours
Structural Framework
42 hours
Site Preparation
17 hours
Drywall and Plasteri
15 hours
Roofing
10 hours
Flooring
6 hours
Painting and Finishe
5 hours
Windows and Exterior
5 hours
Foundation
5 hours
Insulation
2 hours
Interior Doors
2 hours
Bathroom Fixtures
2 hours
Earthworks
0 hours
Monthly Cash Flow
3 monthsiMonthly cost distribution and cumulative S-curve showing how project spending builds over time
56%
M1
96%
M2
100%
M3
Month
days
Monthly Cost
%
Cumulative
%
M1
1–30
C$11,850.07
55.5%
C$11,850.07
56%
M2
31–60
C$8,744.92
41.0%
C$20,594.99
96%
M3
61–90
C$752.35
3.5%
C$21,347.34
100%
Daily Cash Flow
13 weeks
4%
D1
33%
D9
34%
D17
39%
D25
65%
D33
72%
D41
86%
D49
95%
D57
99%
D65
99%
D73
99%
D81
100%
D88
Week
days
Weekly Cost
%
Cumulative
%
W1
D1–D7
C$6,193.28
29.0%
C$6,193.28
29%
W2
D8–D14
C$917.78
4.3%
C$7,111.05
33%
W3
D15–D21
C$373.16
1.7%
C$7,484.22
35%
W4
D22–D28
C$2,674.45
12.5%
C$10,158.66
48%
W5
D29–D35
C$4,277.46
20.0%
C$14,436.13
68%
W6
D36–D42
C$1,329.56
6.2%
C$15,765.69
74%
W7
D43–D49
C$2,546.88
11.9%
C$18,312.58
86%
W8
D50–D56
C$1,781.40
8.3%
C$20,093.98
94%
W9
D57–D63
C$876.77
4.1%
C$20,970.75
98%
W10
D64–D70
C$164.44
0.8%
C$21,135.19
99%
W11
D71–D77
C$13.06
0.1%
C$21,148.25
99%
W12
D78–D84
C$99.55
0.5%
C$21,247.79
100%
W13
D85–D88
C$99.55
0.5%
C$21,347.34
100%
Line Items
16 itemsiDetailed work items grouped by category with quantities, unit prices, and resource breakdown
▼Earthwork1 itemsC$44.03
#
Code
Description
Qty
Unit
Unit Price
Total
1
KAME_KAME_KAKAME_KATOCON
Soil excavation using single-bucket electric dragline excavators with a bucket capacity of: 15 m3, soil group 3
3.0
25 m² × 0.12 = 3 m3(Earthwork)
m3
C$11.60
C$44.03
C$34.81 +15% C$5.22+10% C$4.00
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
0.01
hrs
C$41.68
C$0.28
Bulldozers, power 79 kW (108 hp)
0.01
Machine hours
C$50.27
C$0.35
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$30.39
C$0.21
Single-bucket electric walking excavators with dragline working equipment, bucket capacity 15 m3
0.01
Machine hours
C$4,704.39
C$33.17
Personnel: 3 man-hours/machine-hours
0.01
Machine hours
C$113.86
C$0.80
▼Foundation1 itemsC$579.45
#
Code
Description
Qty
Unit
Unit Price
Total
2
KANE_KAME_KAKAME_RIKA
Construction of strip foundations: concrete
1.5
25 m² × 0.06 = 1.5 m3(Foundation)
m3
C$305.38
C$579.45
C$458.06 +15% C$68.71+10% C$52.68
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
4.23
hrs
C$22.99
C$97.25
Water
0.00
m3
C$121.04
C$0.62
Electricity
0.03
kWh
C$19.82
C$0.62
Polyethylene film, thickness KA.MESA mm
1.32
m2
C$40.69
C$54.03
Construction nails
0.00
t
C$245,571.78
C$73.90
Quicklime, grade I
0.00
t
C$23,480.15
C$6.83
Hot-rolled wire in coils, diameter NE.TO-NE.SA mm
0.00
t
C$169,761.86
C$76.38
Edged softwood boards, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 44-50 mm, grade III
0.00
m3
C$38,813.26
C$127.93
Tower cranes, lifting capacity 8 t
0.32
Machine hours
C$42.01
C$13.42
Personnel: 1 person-hour/machine-hour
0.32
Machine hours
C$18.23
C$5.82
Mobile cranes, lifting capacity 16 t
0.01
Machine hours
C$66.92
C$0.36
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$18.23
C$0.10
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t
0.00
Machine hours
C$69.44
C$0.26
Personnel: 1 person-hour/machine-hour
0.00
Machine hours
C$15.60
C$0.06
Deep vibrators
0.21
Machine hours
C$0.56
C$0.11
Flatbed trucks, load capacity up to 5 tons
0.01
Machine hours
C$25.99
C$0.24
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$13.56
C$0.12
▼Structure1 itemsC$1,113.03
#
Code
Description
Qty
Unit
Unit Price
Total
3
KANE_MEDX_KAKAPU_KAME
Construction of reinforced concrete floors and slabs up to 200 mm thick in permanent formwork (concrete supplied in buck
1.2
25 m² × 0.05 = 1.25 m3(Structure)
m3
C$703.90
C$1,113.03
C$879.88 +15% C$131.98+10% C$101.18
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
10.42
hrs
C$23.00
C$250.06
Anthracene oil
0.00
t
C$33,376.43
C$75.09
Water
0.00
m3
C$54.41
C$0.28
Electricity
0.05
kWh
C$8.91
C$0.56
Polyethylene film, thickness KA.MESA mm
0.54
m2
C$18.29
C$9.77
Construction nails
0.00
t
C$110,381.79
C$13.68
Light wire, diameter ME.ME mm
0.00
t
C$112,428.54
C$28.19
Edged coniferous timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 20-90 mm, thickness 20-90 mm, grade III
0.02
m3
C$21,098.29
C$327.15
Edged softwood board, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 25 mm, grade III
0.00
m3
C$17,446.13
C$34.89
Edged softwood boards, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 44-50 mm, grade III
0.01
m3
C$17,446.13
C$113.33
Tower cranes, lifting capacity 8 t
0.34
Machine hours
C$42.55
C$14.36
Personnel: 1 person-hour/machine-hour
0.34
Machine hours
C$19.02
C$6.42
Mobile cranes, lifting capacity 16 t
0.02
Machine hours
C$67.79
C$1.23
Personnel: 1 person-hour/machine-hour
0.02
Machine hours
C$19.02
C$0.34
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t
0.03
Machine hours
C$70.34
C$2.34
Personnel: 1 person-hour/machine-hour
0.03
Machine hours
C$16.28
C$0.54
Deep vibrators
0.50
Machine hours
C$0.56
C$0.29
Trucks, load capacity up to 8 tons
0.03
Machine hours
C$37.21
C$1.01
Personnel: 1 person-hour/machine-hour
0.03
Machine hours
C$14.16
C$0.38
▼External Walls1 itemsC$3,801.28
#
Code
Description
Qty
Unit
Unit Price
Total
4
KAVO_KARI_KAMESA_KAMECON
Masonry of external and internal brick walls with an air gap: with a floor height of up to 4 m
5.2
25 m² × 0.21 = 5.25 m3(External Walls)
m3
C$572.37
C$3,801.28
C$3,004.97 +15% C$450.74+10% C$345.57
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
29.77
hrs
C$52.98
C$1,577.12
Water
1.31
m3
C$1,000.25
C$1,313.75
Tower cranes, lifting capacity 8 t
1.73
Machine hours
C$24.90
C$43.14
Personnel: 1 person-hour/machine-hour
1.73
Machine hours
C$40.96
C$70.96
▼Internal Walls1 itemsC$7,078.03
#
Code
Description
Qty
Unit
Unit Price
Total
5
KAVO_KATO_KAKATO_KALI
Limestone partition wall masonry: unreinforced with a floor height of up to 4 m
1.8
25 m² × 0.07 = 1.75 m3(Internal Walls)
m3
C$3,197.30
C$7,078.03
C$5,595.29 +15% C$839.29+10% C$643.46
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
16.19
hrs
C$23.08
C$373.61
Water
0.17
m3
C$98.59
C$17.20
Masonry mortar, cement-lime, M25
0.10
m3
C$11,043.17
C$1,159.31
Edged coniferous timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 20-90 mm, thickness 20-90 mm, grade III
0.10
m3
C$38,231.28
C$4,014.08
Tower cranes, lifting capacity 8 t
0.51
Machine hours
C$42.27
C$21.45
Personnel: 1 person-hour/machine-hour
0.51
Machine hours
C$19.00
C$9.64
▼Roofing1 itemsC$534.43
#
Code
Description
Qty
Unit
Unit Price
Total
6
MERI_KAME_KAKALI_KASA
Installation of tile roofs: grooved stamped or pressed (ceramic and cement-sand (concrete))
10.0
25 m² × 0.4 = 10 m2(Roofing)
m2
C$42.25
C$534.43
C$422.47 +15% C$63.37+10% C$48.58
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
9.66
hrs
C$26.94
C$260.21
Steel roofing nails, diameter 2-3 mm, length 20-40 mm
Installation of PVC profile window blocks in residential and public buildings: deaf with an opening area of up to 2 m2
3.0
25 m² × 0.12 = 3 m2(Windows)
m2
C$322.59
C$1,224.21
C$967.75 +15% C$145.16+10% C$111.29
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
5.02
hrs
C$25.69
C$128.97
Electricity
0.34
kWh
C$4.07
C$1.40
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 mm
12.54
m
C$22.29
C$279.45
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 mm
0.64
10 m
C$145.30
C$93.24
Polyurethane foam sealant (assembly foam), universal, volume 1000 ml
2.07
pcs
C$164.80
C$341.19
Steel frame mounting dowels, diameter 10 mm, length 130 (132) mm
0.92
10 pcs
C$66.44
C$60.97
Plastic mounting wedges
0.24
100 pcs
C$239.59
C$57.52
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m
0.05
Machine hours
C$2.53
C$0.13
Personnel: 1 person-hour/machine-hour
0.05
Machine hours
C$13.30
C$0.71
Flatbed trucks, load capacity up to 5 tons
0.10
Machine hours
C$27.41
C$2.70
Personnel: 1 person-hour/machine-hour
0.10
Machine hours
C$14.97
C$1.47
▼Doors1 itemsC$459.33
#
Code
Description
Qty
Unit
Unit Price
Total
8
MEKA_KAME_KAPURI_KARI
Filling balcony openings in wooden log walls with caulking door blocks with door leaves: paired, opening area over 3 m2
0.8
25 m² × 0.03 = 0.75 m2(Doors)
m2
C$484.14
C$459.33
C$363.11 +15% C$54.47+10% C$41.76
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
2.22
hrs
C$27.56
C$61.18
Water
0.01
m3
C$89.23
C$0.46
Electricity
0.06
kWh
C$14.61
C$0.92
Resin-impregnated tow
0.80
kg
C$273.82
C$219.73
Self-tapping steel screws, oxidized, with countersunk head and cross-shaped slot, pointed, diameter 8 mm, length 100 mm
0.00
t
C$269,880.99
C$20.14
Edged coniferous timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 20-90 mm, thickness 20-90 mm, grade III
0.00
m3
C$34,601.01
C$59.51
Flatbed trucks, load capacity up to 5 tons
0.03
Machine hours
C$26.11
C$0.75
Personnel: 1 person-hour/machine-hour
0.03
Machine hours
C$14.41
C$0.42
▼Flooring1 itemsC$542.69
#
Code
Description
Qty
Unit
Unit Price
Total
9
SALI_KAME_KAMEME_KAPU
Installation of bases for floor covering: from wood fiber boards on mastic in one layer with an area of more than 20 m2
21.2
25 m² × 0.85 = 21.25 m2(Flooring)
m2
C$20.19
C$542.69
C$429.00 +15% C$64.35+10% C$49.34
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
5.53
hrs
C$22.89
C$126.65
Dry-process wood fiber boards, hard T-S, group A, thickness 5 mm
0.02
1000 m2
C$3,017.37
C$64.12
KN-2 rubber adhesive mastic
28.26
kg
C$8.38
C$236.80
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m
0.03
Machine hours
C$2.37
C$0.07
Personnel: 1 person-hour/machine-hour
0.03
Machine hours
C$12.69
C$0.35
Flatbed trucks, load capacity up to 5 tons
0.03
Machine hours
C$25.72
C$0.65
Personnel: 1 person-hour/machine-hour
0.03
Machine hours
C$14.27
C$0.36
▼Bathroom1 itemsC$52.25
#
Code
Description
Qty
Unit
Unit Price
Total
10
NETO_KATO_KAKAME_KASA
Removing wall coverings: made of glazed ceramic tiles
2.5
25 m² × 0.1 = 2.5 m2(Bathroom)
m2
C$16.52
C$52.25
C$41.30 +15% C$6.20+10% C$4.75
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Average work load RI.ME
1.86
hrs
C$22.00
C$40.87
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m
0.01
Machine hours
C$2.39
C$0.02
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$12.64
C$0.11
Mobile screw compressors with electric motor, pressure up to 1 MPa (10 atm), capacity up to 5 m3/min
0.04
Machine hours
C$7.10
C$0.29
Pneumatic jackhammers powered by mobile compressors
0.08
Machine hours
C$0.14
C$0.01
▼Plastering1 itemsC$2,035.89
#
Code
Description
Qty
Unit
Unit Price
Total
11
NEME_KAME_KAKAME_KADX
Continuous leveling of interior surfaces (single-layer plastering) with dry mortar mixtures up to 10 mm thick for subseq
40.0
25 m² × 1.6 = 40 m2(Plastering)
m2
C$40.23
C$2,035.89
C$1,609.40 +15% C$241.41+10% C$185.08
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Average work load RI.DX
14.33
hrs
C$23.34
C$334.58
Water
0.20
m3
C$6,184.98
C$1,269.30
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t
0.01
Machine hours
C$68.31
C$0.55
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$16.17
C$0.13
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m
0.08
Machine hours
C$2.36
C$0.20
Personnel: 1 person-hour/machine-hour
0.08
Machine hours
C$12.50
C$1.05
Mobile mortar mixers, drum capacity 65 l
0.28
Machine hours
C$0.16
C$0.05
Personnel: 1 person-hour/machine-hour
0.28
Machine hours
C$12.50
C$3.55
▼Painting1 itemsC$199.09
#
Code
Description
Qty
Unit
Unit Price
Total
12
NERI_KAME_KAKARI_KAME
Simple oil painting of previously painted walls: without preparation, with removal of old paint up to 10%
40.0
25 m² × 1.6 = 40 m2(Painting)
m2
C$3.93
C$199.09
C$157.38 +15% C$23.61+10% C$18.10
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
5.40
hrs
C$24.44
C$131.99
Colored cotton rags
0.06
kg
C$367.75
C$23.81
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m
0.04
Machine hours
C$2.40
C$0.09
Personnel: 1 person-hour/machine-hour
0.04
Machine hours
C$12.82
C$0.51
Flatbed trucks, load capacity up to 5 tons
0.02
Machine hours
C$26.06
C$0.63
Personnel: 1 person-hour/machine-hour
0.02
Machine hours
C$14.42
C$0.35
▼Electrical1 itemsC$401.79
#
Code
Description
Qty
Unit
Unit Price
Total
13
KAVO_KASA_KAPUME_KAMEm
Electrical wiring in chambers: cable or wire with band fasteners
75.0
25 m² × 3 = 75 m(Electrical)
m
C$4.23
C$401.79
C$317.62 +15% C$47.64+10% C$36.53
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
10.54
hrs
C$26.69
C$281.47
Electricity
0.72
kWh
C$0.30
C$0.21
Plastic mounting tapes for wire bundling, fastened with plastic buttons, width 10 mm
0.23
10 m
C$2.51
C$0.57
Polypropylene expansion anchors
0.77
100 pcs
C$2.18
C$1.67
Copper cable lugs for electrical installations
0.01
100 pcs
C$540.07
C$8.10
Mobile cranes, lifting capacity 16 t
0.19
Machine hours
C$65.70
C$12.32
Personnel: 1 person-hour/machine-hour
0.19
Machine hours
C$19.02
C$3.56
Non-tipping wagons, capacity TO.TO m3
0.23
Machine hours
C$0.83
C$0.19
Flatbed trucks, load capacity up to 10 tons
0.19
Machine hours
C$36.63
C$6.87
Personnel: 1 person-hour/machine-hour
0.19
Machine hours
C$14.16
C$2.65
▼Plumbing1 itemsC$926.24
#
Code
Description
Qty
Unit
Unit Price
Total
14
MENE_KATO_KAKARI_KARI
Laying water supply pipelines using multilayer metal-polymer pipes with a diameter of: 20 mm
20.0
25 m² × 0.8 = 20 m(Plumbing)
m
C$36.61
C$926.24
C$732.21 +15% C$109.83+10% C$84.20
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
20.60
hrs
C$27.31
C$562.66
Water
0.09
m3
C$114.86
C$10.61
Electricity
0.47
kWh
C$18.81
C$8.84
Corrugated protective pipes
2.20
m
C$66.34
C$146.14
Tower cranes, lifting capacity 8 t
0.01
Machine hours
C$41.62
C$0.34
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$19.18
C$0.15
Mobile cranes, lifting capacity 16 t
0.01
Machine hours
C$66.30
C$0.39
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$19.18
C$0.11
Flatbed trucks, load capacity up to 5 tons
0.07
Machine hours
C$25.75
C$1.91
Personnel: 1 person-hour/machine-hour
0.07
Machine hours
C$14.28
C$1.06
▼Heating1 itemsC$523.28
#
Code
Description
Qty
Unit
Unit Price
Total
15
MENE_KARI_KAKAME_KARI
Laying heating pipelines made of steel water and gas pipes, non-galvanized, with a diameter of: 20 mm
50.0
25 m² × 2 = 50 m(Heating)
m
C$8.27
C$523.28
C$413.66 +15% C$62.05+10% C$47.57
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
14.85
hrs
C$26.83
C$398.45
Technical gaseous oxygen
0.14
m3
C$6.62
C$0.92
Water
0.22
m3
C$1.82
C$0.40
Linen thread
0.03
kg
C$7.72
C$0.23
MA-0115 oil paint, mummy, iron minium
0.22
kg
C$5.15
C$1.13
Tower cranes, lifting capacity 8 t
0.04
Machine hours
C$41.47
C$1.66
Personnel: 1 person-hour/machine-hour
0.04
Machine hours
C$19.12
C$0.76
Mobile cranes, lifting capacity 16 t
0.04
Machine hours
C$66.05
C$2.31
Personnel: 1 person-hour/machine-hour
0.04
Machine hours
C$19.12
C$0.67
Flatbed trucks, load capacity up to 5 tons
0.17
Machine hours
C$25.65
C$4.49
Personnel: 1 person-hour/machine-hour
0.17
Machine hours
C$14.23
C$2.49
Gas welding and cutting equipment
0.57
Machine hours
C$0.22
C$0.13
▼Insulation1 itemsC$1,832.32
#
Code
Description
Qty
Unit
Unit Price
Total
16
RINE_KAME_KANETO_KAME
Insulation of interior walls on wood with spray guns using liquid thermal insulation coating 1 mm thick
13.8
25 m² × 0.55 = 13.75 m2(Insulation)
m2
C$105.34
C$1,832.32
C$1,448.48 +15% C$217.27+10% C$166.57
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
2.49
hrs
C$25.73
C$64.08
Water
0.00
m3
C$484.35
C$2.48
Electricity
1.02
kWh
C$79.32
C$82.00
Antiseptic for protecting wooden building structures from biological decay
0.00
t
C$945,530.99
C$1,299.64
Flatbed trucks, load capacity up to 5 tons
0.01
Machine hours
C$26.06
C$0.18
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$14.29
C$0.09
Cost Summary
Direct Cost
79%
C$16,875.39
Overhead
+15%
C$2,531.30
Profit
+10%
C$1,940.66
Grand Total
C$21,347.35
Resource Summary
54 resourcesiAggregated materials, labor, and equipment needed for the entire project
Insulation of interior walls on wood with spray gu
4.8%
Plastering
Continuous leveling of interior surfaces (single-l
3.3%
Plumbing
Laying water supply pipelines using multilayer met
2.1%
Windows
Installation of PVC profile window blocks in resid
2.0%
Structure
Construction of reinforced concrete floors and sla
1.4%
Foundation
Construction of strip foundations: concrete
0.7%
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
Materials56% of total
±C$1,188.67±5.6%
Labor23% of total
±C$480.98±2.3%
Overhead12% of total
±C$253.13±1.2%
Profit9% of total
±C$194.07±0.9%
Equipment1% of total
±C$17.89±0.1%
Cost Summary
iFinal cost breakdown with direct costs, overhead, profit, and grand total
Labor
C$4,809.77
22%
Materials
C$11,886.74
56%
Equipment
C$178.88
1%
Direct Cost
C$16,875.39
Overhead
C$2,531.30
12%
Profit
C$1,940.66
9%
Grand Total
C$21,347.35
100%
EUR equivalent
€13.317,12
USD equivalent
$15,347.99
GBP equivalent
£11,619.59
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
Residential · North America
Comparison of estimated cost/m² against market reference ranges
Low 1,500
▲ Typical 2,200
High 3,500
▼ Your Estimate 544 EUR/m²
Significantly below range · 0.25x ratio to typical
Methodology & Assumptions
iCalculation methodology, data sources, and key assumptions underlying this estimate
Data Source
DDC Pricing DB — English
Confidence Level
50%
Overhead Rate
15%
Profit Rate
10%
Items Matched
16
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
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 36 verified work items from our database of 55,719 construction prices.
What work items are included in this estimate?
This BOQ includes 36 work items covering Demolition & Preparation, Foundations & Structure, Roof (Flat), Openings & External Finishes, Internal Finishes, MEP. Each item is matched to unit rates from our verified pricing database spanning 9 languages and 36 locations worldwide.
How long does House Extension / Addition take?
Duration depends on project size and complexity. A typical 25 m² project takes approximately 6 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 house extension / addition include?
Cost estimate for a 30 m² ground-floor house extension. Covers foundation underpinning or new strip footing, structural opening in existing wall (RSJ/steel beam), masonry or timber frame walls, flat or pitched roof, matching exterior finishes, MEP extension, interior finishing, and building control compliance.