French Drain Installation Cost Calculator
Estimate French drain installation costs by drain length, drain type, water problem, trench depth and access, discharge plan, restoration, and permit needs before comparing drainage bids.
At a glance
Per project before contractor-specific scope and site conditions.
These inputs move the estimate before local labor, access, permits, and project conditions.
Ask contractors to separate included work, allowances, exclusions, and change-order rules.
Estimate your project cost
French drain pricing depends on linear footage, whether the project is a shallow yard drain, curtain drain, interior basement drain tile, or deep footing drain, plus excavation depth, soil conditions, discharge routing, sump pump tie-ins, permits, and landscape or hardscape restoration.
Cost drivers to review
- Drain length
- Drain type
- Water problem
- Trench depth and access
- Discharge plan
- Restoration and permits
How this estimate should work
- Estimate French drain scope from drain length, drain type, water problem, trench depth and access, discharge plan, and restoration or permit needs.
- Apply installed ranges for surface yard drains, curtain drains, interior basement drain tile, deep exterior footing drains, perforated pipe, washed gravel, filter fabric, catch basins, dry wells, and labor.
- Flag surface-versus-deep-drain decisions so homeowners do not compare a shallow landscape drain against a foundation-depth excavation or interior basement waterproofing system.
- Separate sump pump tie-in, storm drain connection, dry well, utility marking, call 811, permit inspection, concrete cutting, landscape restoration, irrigation repair, and hardscape replacement from the base trench price.
- Help homeowners compare drainage bids against gutter/downspout fixes, grading, sump pump installation, basement waterproofing, foundation repair, mold remediation, and water damage restoration recommendations before signing.
Cost examples
A planning example for smaller or simpler french drain installation work with easier access, fewer upgrades, and limited prep.
A planning example around the starter range when drain length, drain type, and water problem are near the middle of the project.
A planning example for larger, upgraded, or harder-to-access french drain installation work with more site prep or coordination.
French drain installation cost by drain type
| Drain type | Planning range |
|---|---|
| Surface yard French drain | $850 - $5,200 |
| Curtain drain for groundwater | $1,500 - $9,000 |
| Interior basement drain tile | $2,050 - $12,200 |
| Deep exterior footing drain | $3,400 - $20,300 |
Common questions
How much does french drain installation cost?
A typical french drain installation planning range is $1,500 - $9,000 per project. Final pricing depends on drain length, drain type, water problem, trench depth and access, local labor rates, access, permits, and project conditions.
What changes a french drain installation estimate the most?
The biggest changes usually come from project scope, especially drain length, drain type, water problem, trench depth and access. Contractor availability, code requirements, site access, disposal needs, and regional cost pressure can also move the final quote.
How should I compare french drain installation bids?
Ask each contractor to price the same scope, materials, timeline, cleanup, warranty, and permit assumptions. Then compare what is included, what is excluded, and how each quote handles surprises.
More project types
Browse related cost guides when this project overlaps with another trade or quote.
Compare contractor bids
Often included
- Labor and standard materials for french drain installation.
- Basic site preparation, cleanup, and disposal assumptions.
- Standard contractor scheduling and project coordination.
May cost extra
- Changes related to drain length, drain type, water problem, or trench depth and access.
- Permits, code upgrades, access issues, repairs, haul-off, or special-order materials.
- Scope changes discovered after the contractor inspects the site.
Confirm before hiring
- Whether the bid is fixed-price, allowance-based, or subject to site conditions.
- What is excluded, what could trigger a change order, and how surprises are priced.
- Warranty terms, payment schedule, start date, and cleanup responsibilities.
When to request quotes
Use the estimate after you know drain length, drain type, water problem, and trench depth and access well enough to compare the same scope across contractors.
Good time to ask
- You can describe drain length, drain type, water problem, and trench depth and access without guessing.
- You have photos, measurements, or notes that show the current french drain installation scope.
- You are ready to ask at least two contractors for the same included work, exclusions, warranty, and change-order rules.
Wait until you know more
- The project scope may change after an inspection, repair decision, insurance review, or permit requirement.
- You are still deciding between french drain installation options that would create different material, labor, or access needs.
Before you request quotes
Use these questions to describe your project clearly and compare contractor bids against the same assumptions.
Quote comparison worksheet- What is included in a french drain installation quote, and what would be billed separately?
- How does drain length change labor, materials, disposal, or timeline?
- How does drain type change labor, materials, disposal, or timeline?
- How does water problem change labor, materials, disposal, or timeline?
- How does trench depth and access change labor, materials, disposal, or timeline?
- Which assumptions should stay the same when comparing french drain installation bids?