A French drain in a yard typically costs $1,500-$5,000 for a standard 30- to 50-foot installation, with a national midpoint near $3,000. Total price depends on drain length and depth, soil and slope, access for excavation equipment, pipe and gravel choices, and where the water can safely discharge.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed yard French drain | $10/linear ft | $25/linear ft | $50/linear ft | Labor and common materials included |
| 30-foot installation | $300 | $750 | $1,500 | Basic, accessible run; extras may apply |
| 50-foot installation | $500 | $1,250 | $2,500 | Standard excavation and discharge |
| Complex yard project | $2,500 | $5,000 | $10,000+ | Deep trenching, difficult soil, restoration, or long runs |
What a typical yard French drain costs per foot
Contractors commonly quote $10-$35 per linear foot for straightforward yard drainage, while difficult installations can reach $50 or more per foot. A typical price assumes perforated pipe, gravel, filter fabric, trench excavation, and a basic outlet. A 40-foot run at $25 per foot would cost about $1,000 before substantial lawn repair, permits, or special discharge work.
For an ordinary 30- to 50-foot run, a practical installed budget is $1,500-$5,000. Low estimates generally mean shallow digging and easy access; high estimates often reflect deeper trenches, clay or rocky soil, extensive restoration, or higher-cost local labor.
Assumptions: U.S. national planning ranges, standard perforated pipe and gravel, normal equipment access, and a legal, nearby discharge point.
How pipe, gravel, excavation, and labor shape the quote
Material costs are only part of the price. A contractor may include trenching, grading, hauling, and lawn restoration in one per-foot rate, so quotes should specify what is included. The ranges below represent common shares or charges for a modest residential job; they are not additive in every estimate.
| Quote component | Typical price | What changes it |
|---|---|---|
| Perforated pipe and fittings | $1-$5 per linear ft | Pipe diameter, material, and outlet fittings |
| Gravel and filter fabric | $2-$8 per linear ft | Trench width, stone type, and fabric quality |
| Excavation and installation labor | $5-$20 per linear ft | Depth, soil, access, and crew time |
| Equipment and hauling | $150-$1,000 per job | Machine access and spoil removal distance |
| Yard restoration | $200-$2,000 per job | Sod, planting beds, paving, and disturbed area |
Ask whether the quoted rate includes disposal and restoring the disturbed yard. Labor estimates may be calculated as ; typical landscape drainage labor rates are about $50-$100 per worker-hour, varying by market and contractor.
Does a 4-inch pipe or deeper trench change the price?
Most residential yard drains use 4-inch perforated pipe; moving to a larger pipe can increase materials and may require a wider trench. Depth is a major labor driver: a trench around 12-18 inches deep is generally less costly than one 24-36 inches deep, which can require more excavation, gravel, and spoil handling. The needed depth should follow the drainage plan rather than being increased without a purpose.
Soil and grade can change the estimate sharply. Rocky ground, dense clay, roots, and buried utilities can slow digging or require hand work. A run of 50 feet or longer, a slope too shallow to carry water, or a discharge point uphill from the drain may require additional grading or a sump basin. Confirm that the plan has a workable outlet and continuous fall before comparing pipe prices.
How many crew hours does a 40-foot installation take?
A small crew may install a straightforward 30- to 50-foot drain in 1-2 working days, including excavation, bedding, pipe placement, backfill, and basic cleanup. Tight side yards, hand digging, utility conflicts, or heavy rain can stretch the schedule. Labor costs rise when a crew must protect patios or plantings, move soil by hand, or return for separate restoration work.
Ask for the expected crew size and workdays, along with any minimum service or mobilization charge. For a short drain under 20 feet, equipment delivery and setup may make the per-foot rate higher than for a longer run. Length alone does not predict the quote unless access and soil conditions are similar.
Which soil, slope, and discharge conditions raise the estimate?
Rock excavation can add roughly $10-$30 per linear foot, depending on rock hardness and removal requirements. Clay that holds water may call for more gravel, fabric, or a larger collection area, adding several hundred dollars on a small job. If the yard has less than about 1% fall toward a suitable outlet, grading or a collection basin may be needed; a sump pump system can add about $800-$2,500 or more installed.
Discharge rules also matter. Some municipalities restrict directing runoff onto neighboring property or into sanitary sewers. A new outlet, dry well, or connection to an approved stormwater point may add $300-$2,000, depending on distance and local requirements. Get the discharge method written into the quote rather than assuming the drain simply ends at the property edge.
When do outlet work and lawn repair add extra charges?
Common add-ons include a catch basin at $150-$500, a dry well at $500-$2,000, and a sump basin with pump at $800-$2,500. These components are not automatically needed; the appropriate outlet depends on grade, soil absorption, local rules, and the amount of water. Removing and replacing sod often adds $1-$3 per square foot, while repairing pavers or concrete can cost substantially more.
Hauling excavated soil may cost $100-$600 for a small job, especially when the site cannot store clean fill. Utility locating is often included or arranged before digging, but private-line locating or hand excavation may be billed separately. Separate required drainage work from optional landscaping upgrades in the estimate.
How do regional labor rates shift yard drain prices?
Prices in high-cost metropolitan markets in the Northeast, West Coast, and parts of the Mountain West can run about 15%-35% above national planning figures. Smaller Midwest and Southern markets may land 5%-20% below them, although rocky terrain, wet conditions, and local demand can erase that difference. These percentages are broad comparisons, not fixed regional quotes.
Urban access can add expense when equipment cannot reach the yard or soil must be carried through a house or narrow gate. Rural projects may face longer equipment travel or hauling distances. Compare bids from local drainage contractors using the same drain length, depth, pipe specification, and restoration scope.
How can homeowners trim the French drain estimate?
Keep the project limited to the area causing water problems, and ask whether a shorter run or surface grading can address the issue before installing a full-length drain. Schedule work outside peak demand when contractors have availability, and handle simple, agreed-upon tasks such as moving movable planters before the crew arrives. Do not cut costs by omitting filter fabric, undersizing the outlet, or routing water where it can damage another property.
Request at least three itemized quotes and compare excavation depth, pipe diameter, gravel, discharge, disposal, and restoration—not just the total. A modest repair may suit a damaged outlet or blocked section, but recurring saturation or a failed pipe may justify replacement. The best savings usually come from controlling scope and avoiding work the site does not need.