Professional estimate for a complete site drainage system for a 500 m² plot. Covers French drains, perforated drainage pipes, catch basins, sump pit with pump, gravel drainage layer, geotextile fabric, connection to municipal storm sewer, and grading for surface water management.
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$334,053.84Direct Cost
Labor (26%)C$15,194.69
Materials (16%)C$9,304.94
Equipment (37%)C$21,790.50
Overhead (86%)C$50,108.06
Profit (66%)C$38,416.21
Cost / m²
Labor
C$30.39
Materials
C$18.61
Equipment
C$43.58
Overhead
C$100.22
Profit
C$76.83
Grand Total
C$117.11
Materials / Labor
0.61
Direct Cost %
570.5%
16 work items across 5 categories, 67 resources
Cost Flow
6iVisual flow of the total budget through work categories, showing proportional cost distribution
Complete BOQ: 21 work items for Site Drainage System
3 work item(s) not found in pricing DB for language 'en'.
Categories
6iCost distribution by work category — earthwork, structure, facade, MEP, finishes, etc.
Category
Cost
Cost / m²
Share
Soakaway
C$364,021.08
C$728.04
621.7%
Excavation
C$38,652.61
C$77.31
66.0%
French Drains
C$9,182.13
C$18.36
15.7%
Reinstatement
C$2,737.57
C$5.48
4.7%
Survey & Preparation
C$2,988.09
C$5.98
5.1%
Surface Water Collection
C$4,996.59
C$9.99
8.5%
Top Items
Description
Total
Assembly of casing strands with a nominal diameter at t…
C$38,652.61
Initial grouting of prefabricated mine shaft linings in…
C$5,628.43
Laying of chrysotile cement perforated drainage pipes w…
C$3,380.77
Installation of single-section concrete sand traps 500 …
C$2,813.82
Construction of drainage ditches without supports in so…
C$2,786.81
What-If Scenarios
iExplore how changes in material, labor, or equipment costs affect the total project budget
Optimistic (-10%)
C$52,701.29
↓ C$5,855.70 savings
Labor -10% · Materials -10% · Equipment -10%
Base Estimate
C$58,556.99
Deterministic
Labor ×1.00 · Materials ×1.00 · Equipment ×1.00
Pessimistic (+15%)
C$67,340.54
↑ C$8,783.55 increase
Labor +15% · Materials +15% · Equipment +15%
Custom Scenario: Adjust cost components
Labor0%
Materials0%
Equipment0%
Custom Scenario Total Cost
C$58,556.99
Clicking Apply will update PPP coefficients and recalculate all line items
Project Schedule
≈2 monthsiProject timeline with critical path method (CPM), Gantt chart, and resource allocation
2
months
75
days
7
phases
5
Critical Path
4
Peak workers
645
Labor Hours
Site PreparationEarthworksFoundationStructural FrameworkMEP Rough-inLandscaping and Site WorkTesting and CommissioningCumulative Cost
Labor Hours by Phase
Earthworks
523 hours
Structural Framework
65 hours
Site Preparation
50 hours
MEP Rough-in
34 hours
Landscaping and Site
15 hours
Foundation
7 hours
Testing and Commissi
1 hours
Monthly Cash Flow
3 monthsiMonthly cost distribution and cumulative S-curve showing how project spending builds over time
38%
M1
84%
M2
100%
M3
Month
days
Monthly Cost
%
Cumulative
%
M1
1–30
C$21,971.53
37.5%
C$21,971.53
38%
M2
31–60
C$27,087.36
46.3%
C$49,058.89
84%
M3
61–75
C$9,498.10
16.2%
C$58,556.99
100%
Daily Cash Flow
11 weeks
0%
D1
1%
D8
13%
D15
24%
D22
36%
D29
47%
D36
59%
D43
70%
D50
82%
D57
86%
D64
94%
D71
100%
D75
Week
days
Weekly Cost
%
Cumulative
%
W1
D1–D7
C$467.34
0.8%
C$467.34
1%
W2
D8–D14
C$6,021.21
10.3%
C$6,488.54
11%
W3
D15–D21
C$6,805.59
11.6%
C$13,294.13
23%
W4
D22–D28
C$6,749.08
11.5%
C$20,043.22
34%
W5
D29–D35
C$6,749.08
11.5%
C$26,792.30
46%
W6
D36–D42
C$6,749.08
11.5%
C$33,541.39
57%
W7
D43–D49
C$6,749.08
11.5%
C$40,290.47
69%
W8
D50–D56
C$6,749.08
11.5%
C$47,039.56
80%
W9
D57–D63
C$3,074.52
5.3%
C$50,114.07
86%
W10
D64–D70
C$4,119.36
7.0%
C$54,233.44
93%
W11
D71–D75
C$4,323.55
7.4%
C$58,556.99
100%
Line Items
16 itemsiDetailed work items grouped by category with quantities, unit prices, and resource breakdown
▼Survey & Preparation3 itemsC$2,988.09
#
Code
Description
Qty
Unit
Unit Price
Total
1
TOKA_KAVO_KARILI_KAME
Installation of polyethylene drainage pipes on the roadway of bridges
1.0
1 set(Survey & Preparation)
pcs
C$5.27
C$6.66
C$5.26 +15% C$0.79+10% C$0.61
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Average workload TO.KA
0.16
hrs
C$20.72
C$3.24
Fiberglass reinforcement mesh for facades, mesh size 4x4 mm, surface density 165 g/m2
0.01
m2
C$133.07
C$1.41
Flatbed trucks, load capacity up to 5 tons
0.00
Machine hours
C$24.32
C$0.03
Personnel: 1 person-hour/machine-hour
0.00
Machine hours
C$12.38
C$0.02
Mobile screw compressors with internal combustion engines, pressure up to KA.LI MPa (7 atm), capacity up to SA.PU m3/min
0.02
Machine hours
C$15.69
C$0.31
Personnel: 1 person-hour/machine-hour
0.02
Machine hours
C$12.38
C$0.25
2
RIDX_KAME_RITOTO_KATO
Construction of drainage ditches without supports in soils of group: 6-7
80.0
80 m(Survey & Preparation)
m
C$27.54
C$2,786.81
C$2,203.02 +15% C$330.45+10% C$253.35
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
63.84
hrs
C$29.30
C$1,870.72
Water
0.70
m3
C$11.50
C$8.00
Polyethylene tapes with adhesive layer, transparent, width 20 mm, thickness KA.KAVO mm
0.02
kg
C$285.40
C$4.54
ED-ZD electric detonators
0.02
1000 pcs
C$8,740.17
C$139.86
APRN wire for blasting operations, VP brand
0.03
1000 m
C$904.45
C$28.92
Lightweight drilling hammers for use with stationary compressor stations
18.72
Machine hours
C$6.59
C$123.30
Pneumatic jackhammers for use with stationary compressor stations
9.36
Machine hours
C$2.56
C$23.99
Drill bit sharpening machines
0.03
Machine hours
C$2.07
C$0.07
Supports for portable pneumatic perforators
18.72
Machine hours
C$0.19
C$3.63
3
MENE_KALI_KAKATO_KAME
Connection to existing internal heating and water supply pipe networks with a diameter of: 15 mm
1.0
1 set(Survey & Preparation)
pcs
C$153.85
C$194.62
C$153.85 +15% C$23.08+10% C$17.69
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
4.46
hrs
C$26.39
C$117.70
Acetylene gas, technical grade
0.01
m3
C$270.99
C$2.72
Technical gaseous oxygen
0.04
m3
C$72.33
C$2.94
Welding electrodes for welding low-alloy and carbon steels UONI 13/45, E42A, diameter 4-5 mm
0.15
kg
C$67.02
C$10.03
Welded galvanized steel pipes for water and gas supply with thread, ordinary, nominal diameter 15 mm, wall thickness RI.VO mm
0.40
m
C$48.51
C$19.40
Flatbed trucks, load capacity up to 5 tons
0.01
Machine hours
C$24.19
C$0.24
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$13.59
C$0.13
Gas welding and cutting equipment
0.49
Machine hours
C$0.21
C$0.10
Welding machines for manual arc welding, welding current up to 350 A
0.43
Machine hours
C$1.34
C$0.58
▼Excavation1 itemsC$38,652.61
#
Code
Description
Qty
Unit
Unit Price
Total
4
RISA_MEKA_KAKALI_KAPU
Assembly of casing strands with a nominal diameter at the edge of the excavation pit: 1400
8.0
8 m³(Excavation)
joint
C$3,819.43
C$38,652.61
C$30,555.42 +15% C$4,583.31+10% C$3,513.87
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
270.72
hrs
C$25.98
C$7,033.91
Propane-butane technical mixture
12.96
kg
C$0.59
C$7.59
Welding electrodes for welding low-alloy and carbon steels UONI 13/55, E50A, diameter 4-5 mm
136.00
kg
C$1.18
C$160.93
Straight profile grinding wheel, grinding material grade 25A, dimensions 150x20x32 mm
10.40
pcs
C$2.42
C$25.17
Copper slag
0.64
t
C$57.80
C$36.99
Steel wire disc brush for angle grinders, diameter 125 mm
6.40
pcs
C$2.08
C$13.30
Colored cotton rags
0.56
kg
C$0.76
C$0.42
Edged softwood timber (spruce, pine), natural moisture content, length RI-NE.SA m, width 100 mm and above, thickness 100 mm and above, grade III
2.40
m3
C$143.70
C$344.88
Pipe layers, nominal load capacity 35 t
16.80
Machine hours
C$231.70
C$3,892.56
Personnel: 1 person-hour/machine-hour
16.80
Machine hours
C$19.29
C$324.10
Welding rectifiers, welding current up to 500 A, number of posts 1
155.92
Machine hours
C$3.07
C$478.55
Pipe welding units on a crawler tractor chassis with a diesel generator station, power 125 kW for 6 welding stations (excluding welding equipment)
102.96
Machine hours
C$162.62
C$16,743.21
Personnel: 1 person-hour/machine-hour
102.96
Machine hours
C$13.56
C$1,396.42
Mobile screw compressors with internal combustion engines, pressure up to KA.LI MPa (7 atm), capacity up to SA.PU m3/min
3.36
Machine hours
C$17.15
C$57.62
Personnel: 1 person-hour/machine-hour
3.36
Machine hours
C$11.80
C$39.64
Sandblasting machines operating from mobile compressor units, volume up to 19 l, air consumption 270-700 l/min
2.24
Machine hours
C$0.05
C$0.11
▼French Drains4 itemsC$9,182.13
#
Code
Description
Qty
Unit
Unit Price
Total
5
RIDX_KAME_MEDXPU_KATO
Initial grouting of prefabricated mine shaft linings in soils of the following group: 8-11
100.0
100 m²(French Drains)
m2
C$44.49
C$5,628.43
C$4,449.35 +15% C$667.40+10% C$511.68
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
58.30
hrs
C$29.25
C$1,705.53
Resin-impregnated tow
42.50
kg
C$63.62
C$2,704.07
Mortar pumps with electric motor, capacity 4 m3/h, horizontal delivery range 200 m, vertical delivery range 60 m
23.40
Machine hours
C$1.70
C$39.75
6
TOVO_KAME_KAMEKA_KAME
Laying of chrysotile cement perforated drainage pipes with a diameter of: 300 mm
60.0
60 m(French Drains)
m
C$44.54
C$3,380.77
C$2,672.56 +15% C$400.88+10% C$307.34
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
19.27
hrs
C$20.32
C$391.67
Chrysotile cement coupling for non-pressure pipes BNM, nominal diameter 300 mm
15.24
pcs
C$129.36
C$1,971.49
Mobile cranes, lifting capacity 16 t
0.25
Machine hours
C$68.83
C$16.93
Personnel: 1 person-hour/machine-hour
0.25
Machine hours
C$16.88
C$4.15
Cranes on a tractor, power 121 kW (165 hp), lifting capacity 5 t
3.38
Machine hours
C$59.68
C$201.96
Personnel: 1 person-hour/machine-hour
3.38
Machine hours
C$16.88
C$57.12
Flatbed trucks, load capacity up to 5 tons
0.74
Machine hours
C$26.73
C$19.89
Personnel: 1 person-hour/machine-hour
0.74
Machine hours
C$12.56
C$9.35
7
RISA_MERI_KAMEDX_KANE
Preliminary filling of the pipeline with water during cleaning of the pipeline cavity with a piston passing through with
12.0
12 m³(French Drains)
m
C$2.79
C$42.37
C$33.50 +15% C$5.02+10% C$3.85
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
0.30
hrs
C$27.41
C$8.22
Water
5.25
m3
C$1.62
C$8.50
Filling and pressing units, flow rate up to 500 m3/h
0.12
Machine hours
C$126.72
C$15.05
Personnel: 1 person-hour/machine-hour
0.12
Machine hours
C$14.55
C$1.73
8
RILI_KAPU_KAKATO_KALI
Construction of bases and coverings from sand-gravel or crushed stone-sand mixtures: two-layer upper layer 15 cm thick
50.0
50 m²(French Drains)
m2
C$2.06
C$130.56
C$103.21 +15% C$15.48+10% C$11.87
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Average workload TO.KA
1.44
hrs
C$19.64
C$28.33
Water
1.25
m3
C$1.50
C$1.87
Bulldozers, power 79 kW (108 hp)
0.06
Machine hours
C$42.73
C$2.59
Personnel: 1 person-hour/machine-hour
0.06
Machine hours
C$15.76
C$0.95
Medium-duty motor graders, power 99 kW (135 hp)
0.06
Machine hours
C$91.04
C$5.82
Personnel: 1 person-hour/machine-hour
0.06
Machine hours
C$15.76
C$1.01
Self-propelled smooth vibratory rollers, weight 8 t
0.32
Machine hours
C$66.04
C$20.80
Personnel: 1 person-hour/machine-hour
0.32
Machine hours
C$13.49
C$4.25
Self-propelled smooth vibratory rollers, weight 13 t
0.22
Machine hours
C$81.82
C$18.08
Personnel: 1 person-hour/machine-hour
0.22
Machine hours
C$15.76
C$3.48
Self-propelled smooth vibratory rollers, weight 14 t
0.11
Machine hours
C$80.54
C$8.86
Personnel: 1 person-hour/machine-hour
0.11
Machine hours
C$15.76
C$1.73
Watering machines, tank capacity 6 m3
0.09
Machine hours
C$48.04
C$4.37
Personnel: 1 person-hour/machine-hour
0.09
Machine hours
C$11.73
C$1.07
▼Surface Water Collection4 itemsC$4,996.59
#
Code
Description
Qty
Unit
Unit Price
Total
9
RILI_KALI_KAKADX_KAME
Construction of drainage channels made of composite polymer materials: weighing up to 10 kg/m, complete with a grate (co
8.0
8 m(Surface Water Collection)
m
C$190.72
C$1,930.04
C$1,525.72 +15% C$228.86+10% C$175.46
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
3.11
hrs
C$23.92
C$74.36
Flatbed trucks, load capacity up to 5 tons
0.03
Machine hours
C$23.91
C$0.65
Personnel: 1 person-hour/machine-hour
0.03
Machine hours
C$13.28
C$0.36
Construction of drainage channels made of composite polymer materials: weighing
8.00
m
C$181.29
C$1,450.35
10
RILI_KARI_KATORI_KASA
Installation of single-section concrete sand traps 500 mm long on prepared foundations, hydraulic section diameter: 400
4.0
4 pcs(Surface Water Collection)
pcs
C$556.09
C$2,813.82
C$2,224.37 +15% C$333.65+10% C$255.80
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
6.40
hrs
C$21.45
C$137.28
Bitumen-polymer jointing strips for road surfaces made of asphalt concrete mixtures, dimensions 50x5 mm
4.16
m
C$85.41
C$355.34
Self-tapping phosphated steel screws with countersunk head and cross-shaped slot, pointed, diameter PU.RI mm, length 65 mm
0.10
1000 pcs
C$2,110.43
C$202.45
Planed softwood bars (pine, spruce), dimensions 50x50 mm, grade AB
0.01
m3
C$88,789.19
C$710.15
Edged board of coniferous species, natural moisture content, length RI-NE.SA m, width 100-250 mm, thickness 25 mm, grade II
0.00
m3
C$31,605.11
C$126.53
Single-component polyurethane structural sealant, water-resistant, resistant to UV radiation and aggressive environments, for inter-panel and inter-block joints, prefabricated structure connection nodes, roof joints, and building structure joints
0.46
kg
C$1,416.35
C$645.83
Sideboard trucks, load capacity up to 12 tons, with crane-manipulator, load capacity ME.SA tons
0.39
Machine hours
C$46.39
C$18.00
Personnel: 1 person-hour/machine-hour
0.39
Machine hours
C$14.37
C$5.58
Single-bucket universal front pneumatic wheel loaders, nominal capacity of main bucket ME.ME m3, load capacity 2 t
0.34
Machine hours
C$33.46
C$11.37
Personnel: 1 person-hour/machine-hour
0.34
Machine hours
C$12.50
C$4.25
Deep vibrators
0.13
Machine hours
C$0.52
C$0.07
Concrete mixer trucks, drum capacity 6 m3
0.13
Machine hours
C$42.64
C$5.62
Personnel: 1 person-hour/machine-hour
0.13
Machine hours
C$14.37
C$1.90
11
KAVO_KARI_RITOME_KATOm
Laying corrugated PVC pipes in the ground to protect a single cable with a diameter of: 75 mm
20.0
20 m(Surface Water Collection)
m
C$1.06
C$26.71
C$21.11 +15% C$3.17+10% C$2.43
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Worker Category 1
1.04
hrs
C$20.04
C$20.89
Flatbed trucks, load capacity up to 5 tons
0.01
Machine hours
C$24.03
C$0.14
Personnel: 1 person-hour/machine-hour
0.01
Machine hours
C$13.29
C$0.08
12
MELI_KAME_KAMEKA_KAME
Installation of sanitary (inspection) hatches: with self-tapping screw fasteners
3.0
3 pcs(Surface Water Collection)
pcs
C$59.56
C$226.02
C$178.67 +15% C$26.80+10% C$20.55
Labor Materials Equipment
Type
Resource
Qty
Unit
Unit Price
Cost
Average workload TO.KA
0.65
hrs
C$23.29
C$15.11
Self-tapping steel screws, oxidized, with countersunk head and cross-shaped slot, drill tip, diameter PU.RI mm, length 60 mm
Laying of chrysotile cement perforated drainage pipes wC$1,971.49
Copper pipe+120%PEX pipe-15%Stainless steel+200%
Connection to existing internal heating and water supplC$35.09
Copper pipe+120%PEX pipe-15%Stainless steel+200%
Preliminary filling of the pipeline with water during cC$8.50
Copper pipe+120%PEX pipe-15%Stainless steel+200%
Installation of polyethylene drainage pipes on the roadC$1.41
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
82days
P50
50% probability the project finishes within this timeframe. Median scenario based on Monte Carlo simulation.
91days
P80
80% probability — recommended planning basis. Accounts for common delays and uncertainties.
99days
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$58,556.99
Budget (P80)
C$64,393.95
Maximum (P95)
C$69,987.70
Contingency
+10.0%
Recommended cost reserve based on schedule risk analysis — C$5,836.96 Recommended Budget: C$64,393.95
Deterministic 75 days
P50 82 days
P80 91 days
P95 99 days
P50 P80 P95
Based on Monte Carlo simulation with 10,000 iterations using PERT distribution for each phase duration.
Peak: 4
645 man-hours
5 crit. phases
Cost Risk Analysis
Monte Carlo · 10,000 iterations
Monte Carlo simulation of construction cost uncertainty
Cost Percentiles
C$505,912.35
P10
C$520,848.64
P25
C$540,221.67
P50
C$567,029.56
P80
C$580,856.18
P90
Cumulative Probability (S-Curve)
+5.0%
Recommended Contingency (P80 − P50)
Reserve to cover likely cost overruns with 80% confidence — C$26,807.88
Top Risk Drivers
Category
Work Item
Risk Share
Soakaway
Installation of prefabricated modular storm water
98.2%
Excavation
Assembly of casing strands with a nominal diameter
1.7%
Survey & Preparation
Installation of polyethylene drainage pipes on the
0.0%
Survey & Preparation
Construction of drainage ditches without supports
0.0%
Survey & Preparation
Connection to existing internal heating and water
0.0%
French Drains
Initial grouting of prefabricated mine shaft linin
0.0%
French Drains
Laying of chrysotile cement perforated drainage pi
0.0%
French Drains
Preliminary filling of the pipeline with water dur
0.0%
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
Overhead86% of total
±C$5,010.81±8.6%
Profit66% of total
±C$3,841.62±6.6%
Equipment37% of total
±C$2,179.05±3.7%
Labor26% of total
±C$1,519.47±2.6%
Materials16% of total
±C$930.49±1.6%
Cost Summary
iFinal cost breakdown with direct costs, overhead, profit, and grand total
Labor
C$15,194.69
26%
Materials
C$9,304.94
16%
Equipment
C$21,790.50
37%
Direct Cost
C$334,053.84
Overhead
C$50,108.06
86%
Profit
C$38,416.21
66%
Grand Total
C$58,556.99
100%
EUR equivalent
€36.529,63
USD equivalent
$42,100.39
GBP equivalent
£31,873.19
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 575 EUR/m²
Significantly below range · 0.23x 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 21 verified work items from our database of 55,719 construction prices.
What work items are included in this estimate?
This BOQ includes 21 work items covering Survey & Preparation, Excavation, French Drains, Surface Water Collection, Soakaway, Reinstatement. Each item is matched to unit rates from our verified pricing database spanning 9 languages and 36 locations worldwide.
How long does Site Drainage System take?
Duration depends on project size and complexity. A typical 500 m² plot project takes approximately 3 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 site drainage system include?
Professional estimate for a complete site drainage system for a 500 m² plot. Covers French drains, perforated drainage pipes, catch basins, sump pit with pump, gravel drainage layer, geotextile fabric, connection to municipal storm sewer, and grading for surface water management.