Infrastructure · I05

Retaining Wall Construction Cost Estimate — 20 m × 2.5 m (50 m² face area)

20 m × 2.5 m (50 m² face area) 24 work items 6 sections Toronto, Canada

About This Project

Professional estimate for constructing a 30-metre reinforced concrete retaining wall (2.5m average height). Covers excavation, lean concrete blinding, reinforced concrete wall and footing, waterproofing membrane, drainage layer with weep holes, backfill, and surface finishing. Designed to geotechnical engineering standards.

Scope of Works

Excavation (4)Foundation (4)Wall Construction (5)Waterproofing & Drainage (6)Backfill (3)Safety (2)

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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$3,815.79
Cost / m²
26.5%
Labor
50.8%
Materials
130 days
Est. Duration

Work Items

18 items iAdjust quantities or remove items, then recalculate. Click item name to jump to details.
Construction of concrete foundations for walls, angle of inclination of the exca30m3C$13,455.80
Reinforcement of excavation and trench walls with boards up to 2 m wide: more th20m2C$677.36
Installation of concrete base in excavations for a trough up to 40 m wide, base 30m2C$2,641.83
Installation of prefabricated reinforced concrete base slabs12pcsC$1,582.55
Installation of reinforcement bars in foundation slabs: straight outline with th1.2tC$1,390.05
Installation of individual rods in the formwork of underground and basement part20tC$73,485.58
Installation of a wall and corner protection system: bumpers on aluminum profile15mC$9,257.22
Reinforcement of monolithic reinforced concrete walls in excavations with separa1.8tC$7,199.20
Construction of monolithic concrete middle walls in steel formwork: for station 100m3C$30,636.64
Manual filling of the gap between wall blocks and waterproofing with cement mort50m2C$2,099.96
Fireproof coating of air ducts with comprehensive fire protection based on therm50m2C$10,812.00
Laying of chrysotile cement perforated drainage pipes with a diameter of: 400 mm22mC$1,570.64
Sealing casings when pipes pass through walls with foamed polyethylene, pipe dia7pcsC$1,142.02
Masonry of external and internal brick well walls filled with backfill materials30m3C$15,581.16
Installation of base and leveling layers: from foam glass crushed stone with rol30m3C$8,864.50
Reinforcement of embankment slopes, bridge cones, and overpasses with geocells f30m2C$1,553.37
Installation of a wall and corner protection system: handrail-bumper on an alumi20mC$8,759.31
Installation of sanitary (inspection) hatches: with self-tapping screw fasteners1pcsC$80.48

Project Context

iInput parameters, location adjustment factors, and detection confidence for this estimate
Source
General
50 m² · 18 items
SourceText Query
Work Items18 items · 6 Categories
CurrencyC$ CAD
LanguageEnglish
Date05 Apr 2026
Retaining Wall Construction 20 m × 2.5 m (50 m² face area) Toronto Canada
Cost / m²
C$3,815.79
50 m²
Est. Duration
4 months
130 days
Overhead
15%
C$60,923.09
Direct Costs
213%
C$406,154.08
Location
Toronto, Canada
Americas
×1.07
Estimate Overview
C$190,789.67
C$3,815.79 / m² · 4 months (130 days)
Labor 26% Materials 51% Equipment 2% Overhead 32% Profit 24%
Contingency (P80)
+8%
C$16,026.33
Budget (P80)
C$206,816.00
recommended
Resources
75
41 mat · 8 lab · 26 equ
Overhead + Profit
32% + 24%
C$107,630.83
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$406,154.08Direct Cost
Labor (26%)C$50,465.17
Materials (51%)C$96,901.10
Equipment (2%)C$3,455.59
Overhead (32%)C$60,923.09
Profit (24%)C$46,707.74
Cost / m²
LaborC$1,009.30
MaterialsC$1,938.02
EquipmentC$69.11
OverheadC$1,218.46
ProfitC$934.15
Grand TotalC$3,815.79
Materials / Labor
1.92
Direct Cost %
212.9%
18 work items across 6 categories, 75 resources

Cost Flow

6iVisual flow of the total budget through work categories, showing proportional cost distribution
Total CostC$190,789.67Safety: C$8,839.79 (4.6%)Backfill: C$25,999.03 (13.6%)Excavation: C$16,774.99 (8.8%)Foundation: C$76,458.18 (40.1%)Wall Construction: C$47,093.06 (24.7%)Waterproofing & Drainage: C$338,619.88 (177.5%)Safety4.6%Backfill13.6%Excavation8.8%Foundation40.1%Wall Construction24.7%Waterproofing & Drainage177.5%
  • Complete BOQ: 24 work items for Retaining Wall Construction
  • 3 work item(s) not found in pricing DB for language 'en'.

Categories

6iCost distribution by work category — earthwork, structure, facade, MEP, finishes, etc.
CategoryCostCost / m²Share
SafetyC$8,839.79C$176.804.6%
BackfillC$25,999.03C$519.9813.6%
ExcavationC$16,774.99C$335.508.8%
FoundationC$76,458.18C$1,529.1640.1%
Wall ConstructionC$47,093.06C$941.8624.7%
Waterproofing & DrainageC$338,619.88C$6,772.40177.5%

Top Items

DescriptionTotal
Installation of individual rods in the formwork of unde…C$73,485.58
Construction of monolithic concrete middle walls in ste…C$30,636.64
Masonry of external and internal brick well walls fille…C$15,581.16
Construction of concrete foundations for walls, angle o…C$13,455.80
Fireproof coating of air ducts with comprehensive fire …C$10,812.00

What-If Scenarios

iExplore how changes in material, labor, or equipment costs affect the total project budget
Optimistic (-10%)
C$171,710.70
↓ C$19,078.97 savings
Labor -10% · Materials -10% · Equipment -10%
Base Estimate
C$190,789.67
Deterministic
Labor ×1.00 · Materials ×1.00 · Equipment ×1.00
Pessimistic (+15%)
C$219,408.12
↑ C$28,618.45 increase
Labor +15% · Materials +15% · Equipment +15%
Custom Scenario: Adjust cost components
Labor 0%
Materials 0%
Equipment 0%
Custom Scenario Total Cost
C$190,789.67

Project Schedule

≈4 monthsiProject timeline with critical path method (CPM), Gantt chart, and resource allocation
4
months
130
days
7
phases
6
Critical Path
4
Peak workers
1,377
Labor Hours
M1 M2 M3 M4 M5 Crew/Float Site Preparation Site Preparation: 8d, Crew 2, Float 0d 2 / - Earthworks Earthworks: 14d, Crew 2, Float 0d 14d 2 / - Foundation Foundation: 46d, Crew 2, Float 0d 46d 2 / - Structural Framework Structural Framework: 36d, Crew 3, Float 0d 36d 3 / - Waterproofing and Sea… Waterproofing and Sealants: 18d, Crew 2, Float 0d 18d 2 / - Interior Finishing Interior Finishing: 8d, Crew 2, Float 0d 2 / - Commissioning & Hando… Commissioning & Handover: 8d, Crew 2, Float 122d 2 / 122d Workers 191K 50% (62d)
Site PreparationEarthworksFoundationStructural FrameworkWaterproofing and SealantsInterior FinishingCommissioning & HandoverCumulative Cost
Labor Hours by Phase
Structural Framework
555 hours
Foundation
492 hours
Waterproofing and Se
191 hours
Earthworks
137 hours
Site Preparation
50 hours
Interior Finishing
3 hours
Commissioning & Hand
0 hours

Monthly Cash Flow

5 monthsiMonthly cost distribution and cumulative S-curve showing how project spending builds over time
21%
M1
47%
M2
74%
M3
94%
M4
100%
M5
MonthdaysMonthly Cost%Cumulative%
M11–30C$40,570.4121.3%C$40,570.4121%
M231–60C$49,864.0326.1%C$90,434.4547%
M361–90C$51,597.9927.0%C$142,032.4374%
M491–120C$38,261.8620.1%C$180,294.2994%
M5121–130C$10,495.385.5%C$190,789.67100%

Daily Cash Flow

19 weeks
0%
D1
5%
D13
17%
D25
27%
D37
38%
D49
48%
D61
59%
D73
70%
D85
81%
D97
89%
D109
95%
D121
99%
D129
WeekdaysWeekly Cost%Cumulative%
W1D1–D7C$70.420.0%C$70.420%
W2D8–D14C$11,664.146.1%C$11,734.566%
W3D15–D21C$13,596.437.1%C$25,330.9913%
W4D22–D28C$11,915.156.2%C$37,246.1520%
W5D29–D35C$11,634.946.1%C$48,881.0926%
W6D36–D42C$11,634.946.1%C$60,516.0332%
W7D43–D49C$11,634.946.1%C$72,150.9738%
W8D50–D56C$11,634.946.1%C$83,785.9144%
W9D57–D63C$11,634.946.1%C$95,420.8550%
W10D64–D70C$11,792.576.2%C$107,213.4256%
W11D71–D77C$12,186.656.4%C$119,400.0763%
W12D78–D84C$12,186.656.4%C$131,586.7369%
W13D85–D91C$12,186.656.4%C$143,773.3875%
W14D92–D98C$12,186.656.4%C$155,960.0482%
W15D99–D105C$11,313.745.9%C$167,273.7788%
W16D106–D112C$6,076.243.2%C$173,350.0291%
W17D113–D119C$6,076.243.2%C$179,426.2694%
W18D120–D126C$6,983.763.7%C$186,410.0198%
W19D127–D130C$4,379.652.3%C$190,789.67100%

Line Items

18 itemsiDetailed work items grouped by category with quantities, unit prices, and resource breakdown
▼Excavation 3 items C$16,774.99
#CodeDescriptionQtyUnitUnit PriceTotal
1TOSA_KAME_NEVOLI_KASA
Construction of concrete foundations for walls, angle of inclination of the excavation: 13-30 degrees, rock strength coe
30.0
30 m³(Excavation)
m3C$354.57C$13,455.80
C$10,636.99 +15% C$1,595.55 +10% C$1,223.25
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 189.10hrsC$28.08C$2,502.10
Deep vibrators18.16Machine hoursC$0.55C$9.97
Non-tipping mine cars, capacity RI.SA m312.53Machine hoursC$0.49C$6.10
Construction of concrete foundations for walls, angle of inclination of the exca30.00m3C$270.63C$8,118.82
2KAME_KARI_KANELI_KANE
Reinforcement of excavation and trench walls with boards up to 2 m wide: more than 3 m, depth up to 3 m in wet soils
20.0
20 m³(Excavation)
m2C$26.77C$677.36
C$535.46 +15% C$80.32 +10% C$61.58
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 116.44hrsC$24.74C$406.80
Round coniferous timber, unpeeled, length TO-NE.SA m, diameter 14-24 cm, grade II-III0.12m3C$297.31C$36.27
Unedged softwood boards, natural moisture content, length RI-NE.SA m, width 100-250, thickness 30-50 mm, grade IV0.11m3C$764.52C$82.57
Flatbed trucks, load capacity up to 5 tons0.25Machine hoursC$25.68C$6.32
Personnel: 1 person-hour/machine-hour0.25Machine hoursC$14.24C$3.50
3RIDX_KARI_KATOPU_MEPU
Installation of concrete base in excavations for a trough up to 40 m wide, base thickness: over 200 mm
30.0
30 m²(Excavation)
m2C$69.61C$2,641.83
C$2,088.41 +15% C$313.26 +10% C$240.17
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
2nd grade worker0.75hrsC$21.76C$16.26
Grade 3 worker7.13hrsC$23.77C$169.55
Grade 5 worker0.32hrsC$30.76C$9.87
Grade 4 worker3.96hrsC$26.77C$106.00
Electricity1.21kWhC$11.08C$13.54
Polyethylene film, thickness KA.MESA mm12.00m2C$22.75C$272.85
Non-woven polyester geotextile, needle-punched, surface density 200 g/m28.40m2C$57.74C$484.95
Edged softwood timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 100 mm and above, thickness 100 mm and above, grade III0.04m3C$26,490.76C$953.58
Mobile cranes, lifting capacity 16 t0.08Machine hoursC$67.87C$5.29
Personnel: 1 person-hour/machine-hour0.08Machine hoursC$19.08C$1.49
Concrete pumps, capacity 65 m3/h0.31Machine hoursC$143.38C$44.73
Personnel: 1 person-hour/machine-hour0.31Machine hoursC$20.36C$6.36
Surface vibrators2.82Machine hoursC$0.56C$1.59
Flatbed trucks, load capacity up to 10 tons0.03Machine hoursC$37.84C$1.03
Personnel: 1 person-hour/machine-hour0.03Machine hoursC$14.20C$0.38
Machines for bending and cutting reinforcement bars, power SA.SA kW0.05Machine hoursC$3.32C$0.18
Personnel: 1 person-hour/machine-hour0.05Machine hoursC$14.20C$0.76
▼Foundation 3 items C$76,458.18
#CodeDescriptionQtyUnitUnit PriceTotal
4MEPU_KARI_KAKARI_KAMEInstallation of prefabricated reinforced concrete base slabs12.0
12 m³(Foundation)
pcsC$104.25C$1,582.55
C$1,251.03 +15% C$187.65 +10% C$143.87
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 123.04hrsC$26.47C$609.92
Welding electrodes for welding low-alloy and carbon steels UONI 13/45, E42A, diameter 4-5 mm2.40kgC$6.26C$15.02
Heavy concrete mixes (BST) on gravel aggregate, class B12.5, F(1)75, W21.08m3C$188.14C$203.19
MA-0115 oil paint, mummy, iron minium0.72kgC$5.25C$3.78
Mobile cranes, lifting capacity 16 t4.20Machine hoursC$67.46C$283.33
Personnel: 1 person-hour/machine-hour4.20Machine hoursC$19.53C$82.01
Flatbed trucks, load capacity up to 5 tons1.20Machine hoursC$26.20C$31.44
Personnel: 1 person-hour/machine-hour1.20Machine hoursC$14.53C$17.44
Welding machines for manual arc welding, welding current up to 350 A3.36Machine hoursC$1.46C$4.90
5KANE_RIRI_KAKANE_KARI
Installation of reinforcement bars in foundation slabs: straight outline with threaded coupling connections
1.2
1200 kg(Foundation)
tC$915.70C$1,390.05
C$1,098.85 +15% C$164.83 +10% C$126.37
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 125.72hrsC$22.79C$585.97
Electricity7.78kWhC$0.27C$2.11
Non-woven polypropylene geotextile, needle-punched, thermally bonded, surface density 300 g/m24.15m2C$2.05C$8.53
Ready-mixed masonry mortar, cement, M1000.01m3C$189.23C$2.27
Knitting wire2.40kgC$3.20C$7.67
Hot-rolled sheet metal, steel grades St3sp, St3ps, width 1200-3000 mm, thickness 1-8 mm0.13tC$1,969.01C$259.91
Plastic reinforcement protective layer fasteners, star shape, concrete protective layer thickness 40 mm0.34100 pcsC$6.29C$2.11
Tower cranes, lifting capacity MERI.SA t1.27Machine hoursC$51.08C$64.97
Personnel: 1 person-hour/machine-hour1.27Machine hoursC$18.58C$23.63
Electric bridge cranes, load capacity 16 t0.28Machine hoursC$31.35C$8.65
Personnel: 1 person-hour/machine-hour0.28Machine hoursC$14.90C$4.11
Flatbed trucks, load capacity up to 5 tons0.56Machine hoursC$23.36C$13.17
Personnel: 1 person-hour/machine-hour0.56Machine hoursC$12.96C$7.30
Stationary compressors, capacity 15 m3/min3.86Machine hoursC$13.17C$50.88
Personnel: 1 person-hour/machine-hour3.86Machine hoursC$14.90C$57.56
6KANE_RIPU_KAKATO_KALI
Installation of individual rods in the formwork of underground and basement parts of buildings: walls
20.0
20 m²(Foundation)
tC$2,904.57C$73,485.58
C$58,091.36 +15% C$8,713.70 +10% C$6,680.51
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
2nd grade worker259.40hrsC$21.50C$5,577.74
Grade 5 worker157.00hrsC$30.38C$4,770.38
Tower cranes, lifting capacity 8 t3.80Machine hoursC$41.90C$159.20
Personnel: 1 person-hour/machine-hour3.80Machine hoursC$18.85C$71.62
Mobile cranes, lifting capacity 16 t6.60Machine hoursC$66.74C$440.47
Personnel: 1 person-hour/machine-hour6.60Machine hoursC$18.85C$124.38
Flatbed trucks, load capacity up to 5 tons4.80Machine hoursC$25.92C$124.42
Personnel: 1 person-hour/machine-hour4.80Machine hoursC$14.03C$67.32
Installation of individual rods in the formwork of underground and basement part20.00tC$2,337.79C$46,755.82
▼Wall Construction 3 items C$47,093.06
#CodeDescriptionQtyUnitUnit PriceTotal
7MESA_KALI_KAMESA_METO
Installation of a wall and corner protection system: bumpers on aluminum profiles on plasterboard walls, 150 mm wide
15.0
15 m³(Wall Construction)
mC$487.86C$9,257.22
C$7,317.96 +15% C$1,097.69 +10% C$841.57
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 11.87hrsC$24.95C$46.64
Electricity0.32kWhC$1,450.50C$454.42
Self-tapping steel screws, oxidized, with countersunk head and cross-shaped slot, pointed, diameter TO.SA mm, length 35 mm0.90100 pcsC$7,558.80C$6,816.28
Personnel: 1 person-hour/machine-hour0.00Machine hoursC$12.61C$0.02
Flatbed trucks, load capacity up to 5 tons0.01Machine hoursC$26.16C$0.39
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$14.19C$0.21
8RIDX_KARI_MEKADX_KAVO
Reinforcement of monolithic reinforced concrete walls in excavations with separate rods and reinforcement bars with a di
1.8
1800 kg(Wall Construction)
tC$3,161.70C$7,199.20
C$5,691.08 +15% C$853.66 +10% C$654.47
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
2nd grade worker9.54hrsC$23.04C$219.80
Grade 3 worker5.89hrsC$25.16C$148.08
Grade 4 worker39.47hrsC$28.34C$1,118.54
Low-carbon steel knitting wire0.02tC$36,212.49C$651.84
Hot-rolled reinforcing steel with periodic profile, class A-III, diameter 16-18 mm0.14tC$23,447.08C$3,376.42
Mobile cranes, lifting capacity 16 t1.08Machine hoursC$71.60C$77.33
Personnel: 1 person-hour/machine-hour1.08Machine hoursC$20.19C$21.81
Truck-mounted cranes, lifting capacity 25 t0.54Machine hoursC$86.46C$46.69
Personnel: 1 person-hour/machine-hour0.54Machine hoursC$21.55C$11.63
Trucks with a load capacity of up to 12 tons0.31Machine hoursC$44.64C$13.66
Personnel: 1 person-hour/machine-hour0.31Machine hoursC$17.28C$5.29
9RIDX_KARI_KATONE_KATO
Construction of monolithic concrete middle walls in steel formwork: for station tunnels
100.0
100 m²(Wall Construction)
m3C$242.19C$30,636.64
C$24,218.68 +15% C$3,632.80 +10% C$2,785.15
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 1317.19hrsC$72.24C$22,913.94
Anthracene oil0.01tC$17.88C$0.18
Water2.00m3C$0.03C$0.06
Polyethylene film, thickness KA.MESA mm6.90m2C$0.01C$0.07
Non-woven polypropylene geotextile, needle-punched, thermally bonded, surface density 550 g/m25.20m2C$0.07C$0.35
Bolts with nuts and washers for construction96.00kgC$0.14C$13.22
Linear large-panel steel formwork shield, collapsible and repositionable, inventory, for wall formwork2.48tC$92.08C$228.36
Auxiliary station trolleys489.52Machine hoursC$0.54C$265.55
Mobile cranes, lifting capacity 16 t1.73Machine hoursC$175.88C$304.27
Personnel: 1 person-hour/machine-hour1.73Machine hoursC$50.74C$87.77
Deep vibrators52.20Machine hoursC$1.46C$76.24
Flatbed trucks, load capacity up to 10 tons2.42Machine hoursC$98.06C$237.29
Personnel: 1 person-hour/machine-hour2.42Machine hoursC$37.76C$91.39
▼Waterproofing & Drainage 4 items C$15,624.62
#CodeDescriptionQtyUnitUnit PriceTotal
10RIDX_KARI_KANENE_KAME
Manual filling of the gap between wall blocks and waterproofing with cement mortar when the gap width is: 10 cm
50.0
50 m²(Waterproofing & Drainage)
m2C$33.20C$2,099.96
C$1,660.05 +15% C$249.01 +10% C$190.91
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 124.45hrsC$23.61C$577.20
Edged coniferous timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 20-90 mm, thickness 20-90 mm, grade III0.01m3C$81,602.13C$408.09
Edged softwood board, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 25 mm, grade III0.01m3C$67,476.63C$674.76
11RINE_KARI_KAKALI_KAME
Fireproof coating of air ducts with comprehensive fire protection based on thermal insulation boards with a fire resista
50.0
50 m²(Waterproofing & Drainage)
m2C$170.94C$10,812.00
C$8,547.03 +15% C$1,282.05 +10% C$982.91
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 1123.96hrsC$33.56C$4,159.72
Water0.01m3C$3.20C$0.02
Colored cotton rags5.00kgC$6.59C$32.93
Single woven steel mesh made of uncoated wire with square cells, wire diameter ME.PU mm, cell size 12x12 mm60.50m2C$16.53C$1,000.37
Steel packaging tape, soft, normal precision in thickness and width 0.7x20-50 mm0.03tC$5,567.27C$167.02
Mineral wool slabs with synthetic binder, thermal insulation PPZh-160, increased rigidity, density 151-170 kg/m33.00m3C$998.82C$2,996.47
Solvent No. 6460.01tC$7,353.71C$36.77
Electric winches with a pulling force of up to SA.LIDX kN (KA.SADX t)0.84Machine hoursC$0.57C$0.48
Flatbed trucks, load capacity up to 5 tons1.18Machine hoursC$35.79C$42.05
Personnel: 1 person-hour/machine-hour1.18Machine hoursC$19.80C$23.27
Mobile piston compressors with electric motor, pressure up to KA.NE MPa (6 atm), capacity up to KA.VOTO m3/min32.44Machine hoursC$0.96C$31.20
Plastering and painting units when working from mobile compressor units32.44Machine hoursC$1.75C$56.73
12TOVO_KAME_KAMEKA_KARI
Laying of chrysotile cement perforated drainage pipes with a diameter of: 400 mm
22.0
22 m(Waterproofing & Drainage)
mC$56.44C$1,570.64
C$1,241.61 +15% C$186.24 +10% C$142.79
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 110.60hrsC$22.79C$241.59
Chrysotile cement coupling for non-pressure pipes BNM, nominal diameter 400 mm5.59pcsC$144.99C$810.23
Mobile cranes, lifting capacity 16 t0.14Machine hoursC$77.14C$10.86
Personnel: 1 person-hour/machine-hour0.14Machine hoursC$18.93C$2.67
Cranes on a tractor, power 121 kW (165 hp), lifting capacity 5 t1.84Machine hoursC$66.90C$122.88
Personnel: 1 person-hour/machine-hour1.84Machine hoursC$18.93C$34.78
Flatbed trucks, load capacity up to 5 tons0.42Machine hoursC$29.96C$12.66
Personnel: 1 person-hour/machine-hour0.42Machine hoursC$14.09C$5.95
13RIRI_KANE_KAMESA_KALI
Sealing casings when pipes pass through walls with foamed polyethylene, pipe diameter: over 350 to 400 mm
7.0
7 pcs(Waterproofing & Drainage)
pcsC$128.97C$1,142.02
C$902.79 +15% C$135.42 +10% C$103.82
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
2nd grade worker0.91hrsC$27.70C$25.20
Grade 3 worker18.13hrsC$30.25C$548.37
Grade 4 worker9.03hrsC$34.07C$307.62
Polyethylene foam thermal insulation sealing cord, round solid cross-section, density 25-40 kg/m3, diameter 30 mm3.15100 mC$0.94C$2.95
Expanding gypsum-clay cement0.07tC$63.98C$4.48
Flatbed trucks, load capacity up to 5 tons0.28Machine hoursC$32.54C$9.11
Personnel: 1 person-hour/machine-hour0.28Machine hoursC$18.07C$5.06
▼Backfill 3 items C$25,999.03
#CodeDescriptionQtyUnitUnit PriceTotal
14KAVO_KARI_KAMEPU_MEKA
Masonry of external and internal brick well walls filled with backfill materials: 510 mm thick for floor heights over 4
30.0
30 m³(Backfill)
m3C$410.57C$15,581.16
C$12,317.12 +15% C$1,847.57 +10% C$1,416.47
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 1163.80hrsC$23.94C$3,921.14
Water7.50m3C$1,024.28C$7,683.05
Tower cranes, lifting capacity 8 t8.10Machine hoursC$41.59C$336.91
Personnel: 1 person-hour/machine-hour8.10Machine hoursC$18.29C$148.13
Universal front-end pneumatic wheeled single-bucket loaders, nominal capacity of main bucket RI.NE m3, load capacity 5 t2.70Machine hoursC$68.76C$185.64
Personnel: 1 person-hour/machine-hour2.70Machine hoursC$15.65C$42.25
15RILI_KAPU_KAKAME_KANE
Installation of base and leveling layers: from foam glass crushed stone with roller compaction
30.0
30 m³(Backfill)
m3C$233.58C$8,864.50
C$7,007.51 +15% C$1,051.13 +10% C$805.86
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Average workload RI.RI5.95hrsC$12.59C$74.83
Light motor graders, power 77 kW (105 hp)0.26Machine hoursC$80.08C$20.42
Personnel: 1 person-hour/machine-hour0.26Machine hoursC$10.83C$2.76
Mobile cranes, lifting capacity 16 t2.88Machine hoursC$66.18C$190.61
Personnel: 1 person-hour/machine-hour2.88Machine hoursC$10.83C$31.19
Self-propelled smooth vibratory rollers, weight 8 t0.89Machine hoursC$80.25C$71.51
Personnel: 1 person-hour/machine-hour0.89Machine hoursC$9.27C$8.26
Trucks, load capacity up to 8 tons1.91Machine hoursC$36.33C$69.22
Personnel: 1 person-hour/machine-hour1.91Machine hoursC$8.06C$15.35
Installation of base and leveling layers: from foam glass crushed stone with rol30.00m3C$217.45C$6,523.37
16KAME_KARI_KATOLI_KAME
Reinforcement of embankment slopes, bridge cones, and overpasses with geocells filled with topsoil and grass seeds, with
30.0
30 m²(Backfill)
m2C$40.93C$1,553.37
C$1,227.95 +15% C$184.19 +10% C$141.22
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 16.67hrsC$49.46C$329.98
Water0.30m3C$2.36C$0.70
Driven anchors made of A-I reinforcing steel, diameter 12 mm, length 900 mm0.09tC$4,689.31C$440.32
Metal staples for mechanical and electric staplers, size 73, height 12 mm0.81kgC$84.27C$67.96
Topsoil5.40m3C$68.17C$368.10
Mobile cranes, lifting capacity 16 t0.03Machine hoursC$147.77C$4.78
Personnel: 1 person-hour/machine-hour0.03Machine hoursC$42.17C$1.36
Watering machines, tank capacity 6 m30.07Machine hoursC$130.34C$9.39
Personnel: 1 person-hour/machine-hour0.07Machine hoursC$31.39C$2.26
Flatbed trucks, load capacity up to 5 tons0.03Machine hoursC$57.39C$2.00
Personnel: 1 person-hour/machine-hour0.03Machine hoursC$31.39C$1.09
▼Safety 2 items C$8,839.79
#CodeDescriptionQtyUnitUnit PriceTotal
17MESA_KALI_KAMESA_MEME
Installation of a wall and corner protection system: handrail-bumper on an aluminum profile on plasterboard walls
20.0
20 m(Safety)
mC$346.22C$8,759.31
C$6,924.36 +15% C$1,038.65 +10% C$796.30
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Worker Category 12.47hrsC$24.89C$61.53
Electricity0.38kWhC$99.55C$37.42
Steel frame mounting dowels, diameter 10 mm, length 130 (132) mm4.2010 pcsC$1,624.44C$6,823.72
Single-mast hoists, load capacity up to 500 kg, lifting height 45 m0.01Machine hoursC$2.38C$0.02
Personnel: 1 person-hour/machine-hour0.01Machine hoursC$12.58C$0.07
Flatbed trucks, load capacity up to 5 tons0.04Machine hoursC$25.79C$1.03
Personnel: 1 person-hour/machine-hour0.04Machine hoursC$14.15C$0.57
18MELI_KAME_KAMEKA_KAME
Installation of sanitary (inspection) hatches: with self-tapping screw fasteners
1.0
1 set(Safety)
pcsC$63.62C$80.48
C$63.62 +15% C$9.54 +10% C$7.32
Labor Materials Equipment
TypeResourceQtyUnitUnit PriceCost
Average workload TO.KA0.22hrsC$24.89C$5.38
Self-tapping steel screws, oxidized, with countersunk head and cross-shaped slot, drill tip, diameter PU.RI mm, length 60 mm0.04100 pcsC$241.34C$9.73
Single-component silicone-based sealant, acidic, universal0.07lC$677.56C$48.45
Flatbed trucks, load capacity up to 5 tons0.00Machine hoursC$27.51C$0.04
Personnel: 1 person-hour/machine-hour0.00Machine hoursC$14.87C$0.02
Cost Summary
Direct Cost213%C$406,154.08
Overhead+15%C$60,923.09
Profit+10%C$46,707.74
Grand TotalC$190,789.67

Resource Summary

75 resourcesiAggregated materials, labor, and equipment needed for the entire project
Materials to Order (41)
ResourceUnitQtyUnit PriceCost
Installation of individual rods in the formwork of underground and bast20.00C$2,337.79C$46,755.82
Construction of concrete foundations for walls, angle of inclination om330.00C$270.63C$8,118.82
Waterm39.80C$783.66C$7,683.83
Steel frame mounting dowels, diameter 10 mm, length 130 (132) mm10 pcs4.20C$1,624.70C$6,823.72
Self-tapping steel screws, oxidized, with countersunk head and cross-s100 pcs0.90C$7,573.64C$6,816.28
Installation of base and leveling layers: from foam glass crushed stonm330.00C$217.45C$6,523.37
Hot-rolled reinforcing steel with periodic profile, class A-III, diamet0.14C$23,447.36C$3,376.42
Mineral wool slabs with synthetic binder, thermal insulation PPZh-160,m33.00C$998.82C$2,996.47
Single woven steel mesh made of uncoated wire with square cells, wire m260.50C$16.54C$1,000.37
Edged softwood timber (spruce, pine), natural moisture content, lengthm30.04C$26,488.33C$953.58
Chrysotile cement coupling for non-pressure pipes BNM, nominal diametepcs5.59C$144.99C$810.23
Edged softwood board, natural moisture content, length RI-NE.SA m, widm30.01C$67,476.00C$674.76
Low-carbon steel knitting wiret0.02C$36,213.33C$651.84
ElectricitykWh9.68C$52.43C$507.49
Non-woven polyester geotextile, needle-punched, surface density 200 g/m28.40C$57.73C$484.95
Driven anchors made of A-I reinforcing steel, diameter 12 mm, length 9t0.09C$4,689.24C$440.32
Edged coniferous timber (spruce, pine), natural moisture content, lengm30.01C$81,618.00C$408.09
Topsoilm35.40C$68.17C$368.10
Polyethylene film, thickness KA.MESA mmm218.90C$14.44C$272.92
Hot-rolled sheet metal, steel grades St3sp, St3ps, width 1200-3000 mm,t0.13C$1,969.02C$259.91
Linear large-panel steel formwork shield, collapsible and repositionabt2.48C$92.08C$228.36
Heavy concrete mixes (BST) on gravel aggregate, class B12.5, F(1)75, Wm31.08C$188.14C$203.19
Steel packaging tape, soft, normal precision in thickness and width 0.t0.03C$5,567.33C$167.02
Unedged softwood boards, natural moisture content, length RI-NE.SA m, m30.11C$764.54C$82.57
Metal staples for mechanical and electric staplers, size 73, height 12kg0.81C$84.28C$67.96
Single-component silicone-based sealant, acidic, universall0.07C$678.57C$48.45
Solvent No. 646t0.01C$7,354.00C$36.77
Round coniferous timber, unpeeled, length TO-NE.SA m, diameter 14-24 cm30.12C$297.30C$36.27
Colored cotton ragskg5.00C$6.59C$32.93
Welding electrodes for welding low-alloy and carbon steels UONI 13/45,kg2.40C$6.26C$15.02
Grand TotalC$96,901.10
Labor Requirements (8)
ResourceUnitQtyUnit PriceCost
Worker Category 1hrs805.31C$45.15C$36,356.53
2nd grade workerhrs270.60C$21.58C$5,839.00
Grade 5 workerhrs157.32C$30.39C$4,780.25
Grade 4 workerhrs52.46C$29.20C$1,532.16
Personnel: 1 person-hour/machine-hourMachine hours54.16C$18.67C$1,011.02
Grade 3 workerhrs31.15C$27.80C$866.00
Average workload RI.RIhrs5.95C$12.58C$74.83
Average workload TO.KAhrs0.22C$24.87C$5.38
Grand TotalC$50,465.17
Equipment Requirements (26)
ResourceUnitQtyUnit PriceCost
Mobile cranes, lifting capacity 16 tMachine hours16.74C$78.66C$1,316.94
Tower cranes, lifting capacity 8 tMachine hours11.90C$41.69C$496.11
Auxiliary station trolleysMachine hours489.52C$0.54C$265.55
Flatbed trucks, load capacity up to 5 tonsMachine hours8.78C$27.64C$242.63
Flatbed trucks, load capacity up to 10 tonsMachine hours2.45C$97.39C$238.32
Universal front-end pneumatic wheeled single-bucket loaders, nominal cMachine hours2.70C$68.76C$185.64
Cranes on a tractor, power 121 kW (165 hp), lifting capacity 5 tMachine hours1.84C$66.89C$122.88
Deep vibratorsMachine hours70.36C$1.23C$86.21
Self-propelled smooth vibratory rollers, weight 8 tMachine hours0.89C$80.26C$71.51
Trucks, load capacity up to 8 tonsMachine hours1.91C$36.34C$69.22
Tower cranes, lifting capacity MERI.SA tMachine hours1.27C$51.08C$64.97
Plastering and painting units when working from mobile compressor unitMachine hours32.44C$1.75C$56.73
Stationary compressors, capacity 15 m3/minMachine hours3.86C$13.17C$50.88
Truck-mounted cranes, lifting capacity 25 tMachine hours0.54C$86.46C$46.69
Concrete pumps, capacity 65 m3/hMachine hours0.31C$143.37C$44.73
Mobile piston compressors with electric motor, pressure up to KA.NE MPMachine hours32.44C$0.96C$31.20
Light motor graders, power 77 kW (105 hp)Machine hours0.26C$80.08C$20.42
Trucks with a load capacity of up to 12 tonsMachine hours0.31C$44.64C$13.66
Watering machines, tank capacity 6 m3Machine hours0.07C$130.42C$9.39
Electric bridge cranes, load capacity 16 tMachine hours0.28C$31.34C$8.65
Grand TotalC$3,455.60

Material Alternatives

iAlternative materials with approximate price difference. Percentages show material cost change relative to the current specification.
Construction of concrete foundations for walls, angle oC$8,118.82
High-strength concrete+20%Lightweight concrete+15%Recycled aggregate-10%
Fireproof coating of air ducts with comprehensive fire C$4,233.58
XPS foam board+30%Cellulose fiber-15%Spray foam+50%
Reinforcement of monolithic reinforced concrete walls iC$4,028.26
High-strength concrete+20%Lightweight concrete+15%Recycled aggregate-10%
Installation of concrete base in excavations for a trouC$1,724.92
High-strength concrete+20%Lightweight concrete+15%Recycled aggregate-10%
Manual filling of the gap between wall blocks and waterC$1,082.85
Clay/concrete tiles+40%Green roof system+120%EPDM membrane-20%
Reinforcement of embankment slopes, bridge cones, and oC$877.09
Galvanized rebar+35%Fiber reinforcement-15%Stainless steel rebar+110%

Risk Analysis

Monte Carlo · 10KiMonte Carlo simulation (10,000 iterations) showing completion probability at different confidence levels
143days
P50
50% probability the project finishes within this timeframe. Median scenario based on Monte Carlo simulation.
153days
P80
80% probability — recommended planning basis. Accounts for common delays and uncertainties.
163days
P95
95% probability — conservative estimate. Covers nearly all risk scenarios including severe delays.
+23days
Buffer
Recommended time buffer to add to the deterministic schedule. Covers typical construction uncertainties.
Base Cost (P50)
C$190,789.67
Budget (P80)
C$204,843.53
Maximum (P95)
C$218,311.81
Contingency
+7.4%
Recommended cost reserve based on schedule risk analysis — C$14,053.86
Recommended Budget: C$204,843.53
Deterministic 130 days
P50 143 days
P80 153 days
P95 163 days
P50 P80 P95
Based on Monte Carlo simulation with 10,000 iterations using PERT distribution for each phase duration.
Peak: 4
1,377 man-hours
6 crit. phases

Cost Risk Analysis

Monte Carlo · 10,000 iterations

Monte Carlo simulation of construction cost uncertainty

Cost Percentiles

C$626,509.48
P10
C$641,056.28
P25
C$659,459.39
P50
C$684,310.86
P80
C$697,826.47
P90

Cumulative Probability (S-Curve)

+3.8%
Recommended Contingency (P80 − P50)
Reserve to cover likely cost overruns with 80% confidence — C$24,851.47

Top Risk Drivers

CategoryWork ItemRisk Share
Waterproofing & DrainageDrainage pipelines, assembly 174-2, diameter and w
91.7%
FoundationInstallation of individual rods in the formwork of
6.8%
Wall ConstructionConstruction of monolithic concrete middle walls i
0.7%
ExcavationConstruction of concrete foundations for walls, an
0.2%
BackfillMasonry of external and internal brick well walls
0.2%
Wall ConstructionInstallation of a wall and corner protection syste
0.1%
Waterproofing & DrainageFireproof coating of air ducts with comprehensive
0.1%
BackfillInstallation of base and leveling layers: from foa
0.1%

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
Materials51% of total
±C$9,690.11±5.1%
Overhead32% of total
±C$6,092.31±3.2%
Labor26% of total
±C$5,046.52±2.6%
Profit24% of total
±C$4,670.77±2.4%
Equipment2% of total
±C$345.56±0.2%

Cost Summary

iFinal cost breakdown with direct costs, overhead, profit, and grand total
LaborC$50,465.1726%
MaterialsC$96,901.1051%
EquipmentC$3,455.592%
Direct CostC$406,154.08
OverheadC$60,923.0932%
ProfitC$46,707.7424%
Grand TotalC$190,789.67100%
EUR equivalent€119.020,38
USD equivalent$137,170.99
GBP equivalent£103,848.85

Estimate Classification

AACE 18R-97

AACE International Recommended Practice 18R-97

2
ClassClass 2
Typical PurposeCost Control
Expected Accuracy Range: -15% / +20%
Project Definition Level: 30–75%

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
6,544 EUR/m²
Significantly above range · 2.62x 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 18:10 · This estimate is for preliminary budgeting purposes only.

Frequently Asked Questions

How much does Retaining Wall Construction cost?
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 24 verified work items from our database of 55,719 construction prices.
What work items are included in this estimate?
This BOQ includes 24 work items covering Excavation, Foundation, Wall Construction, Waterproofing & Drainage, Backfill, Safety. Each item is matched to unit rates from our verified pricing database spanning 9 languages and 36 locations worldwide.
How long does Retaining Wall Construction take?
Duration depends on project size and complexity. A typical 20 m × 2.5 m (50 m² face area) project takes approximately 4 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 retaining wall construction include?
Professional estimate for constructing a 30-metre reinforced concrete retaining wall (2.5m average height). Covers excavation, lean concrete blinding, reinforced concrete wall and footing, waterproofing membrane, drainage layer with weep holes, backfill, and surface finishing. Designed to geotechnical engineering standards.

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