Yard Drainage System Cost Calculator

Build a yard-drainage planning scenario from entered run length, pipe and catch-basin materials, aggregate or fabric materials, excavation equipment, discharge or restoration, labor, access, and permit assumptions. The calculator does not diagnose drainage, model hydraulics, establish legal discharge, locate utilities, design grading, or determine soil, groundwater, environmental, or permit requirements.

Reviewed 2026-08-24

Methodology and sources

This yard-drainage planning result is derived from entered drainage length and pipe material cost per foot, catch-basin count and unit cost, aggregate and fabric materials, excavation equipment, discharge and restoration, labor, permit, site access, and matching ZIP inputs; it does not select a drainage solution.

Formula in plain English

For the yard-drainage model, the calculator multiplies drainageRunLengthFeet by pipeMaterialCostPerFoot and catchBasinCount by catchBasinCostPerUnit, adds aggregateFabricMaterialAllowance, keeps excavationEquipmentAllowance and dischargeRestorationAllowance direct, adds access-adjusted laborHours times laborHourlyRate, and adds permitAllowance.

Visible assumptions

  • Run length, pipe rate, basin quantity, and basin unit cost share a documented design concept.
  • Aggregate, fabric, excavation equipment, discharge, restoration, labor, and permits are separate entries.
  • Site access affects labor only; equipment and discharge or restoration remain direct.

Worked example

Example entered yard-drainage scenario

  • 120 ft at an entered $6 pipe material cost per foot and 3 basins at $180 each
  • $700 aggregate or fabric, $900 excavation equipment, and $800 discharge or restoration
  • 32 labor hours at an entered $75 plus a $200 permit allowance

With open access and neutral matching factors: 120 x $6 + 3 x $180 + $700 + $900 + $800 + 32 x $75 + $200 = $6,260.

The modeled planning total is $6,260 for the entered concept; it is not a finding that the proposed drainage approach will work.

Limitations

  • The model does not survey grades, calculate runoff, size pipes, test soils, or design discharge.
  • It does not determine easements, utilities, erosion, water quality, permits, or downstream impacts.
  • The result is not a drainage design, environmental approval, permit decision, or contractor quote.

Practical next steps

  1. Document observed water, grades, contributing area, soil, utilities, discharge, restoration, and maintenance scope.
  2. Obtain project-specific drainage design and applicable stormwater and permit review.

Source records

National Pollutant Discharge Elimination System Stormwater Program

Publisher
U.S. Environmental Protection Agency
Dates
Effective 2026-08-24; retrieved 2026-08-24
Supports
Stormwater-control and discharge context relevant to planning drainage, runoff, and applicable program review.
Not price evidence
Does not support a drainage-system price, hydraulic design, discharge approval, permit outcome, or contractor quote.

Yard Drainage System Cost Calculator FAQs

A reliable project estimate depends on the scope and units you enter. A canned national range is withheld until a reviewed source matches this calculator's exact project type, unit, geography, and evidence date.
Use the result to compare input scenarios and prepare a budget. Confirm quantities, site conditions, included work, permits, and final pricing with itemized quotes from qualified local professionals.
Local labor availability, materials, access, project complexity, code requirements, permits, and contractor scope can change the final price. The calculator result is a planning estimate, not a contractor offer or guaranteed quote.

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Enter Your Details

Fill in the form to get your estimate

Enter the measured run length from the documented project layout. Length alone does not determine pipe size, slope, capacity, discharge, or design.

Enter a material-only amount for the selected pipe and fittings using the same length basis. The calculator does not supply a price or select pipe.

Enter the number of catch basins or inlets in the documented scope. The calculator does not determine quantity, location, elevation, or capacity.

Enter a documented material-only amount for each selected basin or inlet. Do not include excavation or installation labor here.

Enter a material-only allowance for the specified aggregate, fabric, bedding, backfill, and related materials.

Enter the quoted or budgeted equipment amount for the defined trenching, excavation, handling, or access scope. It remains unindexed.

Enter the documented allowance for the defined outlet, tie-in, erosion protection, surface restoration, or related mixed scope. It remains unindexed.

Enter billable hours from the documented layout, excavation, installation, bedding, connections, backfill, restoration, cleanup, and closeout scope.

Enter a documented billable rate matching the labor-hours definition. The calculator does not supply a current local wage or installer rate.

Enter only a current amount verified with the applicable authority. This field does not establish drainage, discharge, stormwater, right-of-way, environmental, or other approvals.

Apply an explicit labor-only access factor. It does not assess utilities, trench safety, soil, groundwater, slope, structures, vegetation, equipment feasibility, or legal discharge.

Used only for available material, labor, or permit factors. It does not provide drainage analysis, utility locations, a project price, discharge authority, design, or provider availability.

All figures shown are estimates based on average costs and may vary significantly based on your specific situation, contractor, materials, and local conditions.

We recommend consulting with licensed professionals in your area for accurate quotes tailored to your specific needs.

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