⚡ Plumbing · Concord, NH

How Much Does It Cost to Install a French Drain in Concord, NH?

Local pricing for the Concord metro area · Updated April 2026

Low End
$2,040
Basic install
Average Cost
$5,090
Most homeowners pay this
High End
$10,180
Complex install
$3,310
Labor (65%)
$1,780
Materials (35%)
2–5
Days to complete

Prices estimated using the NailThePrice Local Cost Model™ — national averages adjusted for Concord's labor rates, cost of living, and material pricing.

How Much Does Each Part of French drain installation Cost?

The cost to install a french drain in Concord ranges from $2,040 to $10,180, with most homeowners paying around $5,090. Your actual cost depends on several factors specific to your home and the Concord market.

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Linear Feet

French drain projects are priced per linear foot — longer drains mean more trenching, gravel, and pipe, scaling costs linearly.

Depth And Width

Deeper drains (18–24 inches) handle more water but require more excavation labor and gravel fill than shallow 12-inch drains.

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Gravel Type

Washed drainage gravel is essential for proper function but costs more than standard fill. Skimping on gravel quality leads to clogging.

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Pipe Diameter

4-inch perforated pipe is standard for residential French drains. Larger diameters handle more water but cost more per foot.

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Landscape Restoration

Trenching through landscaped areas requires restoring sod, mulch beds, or plantings after the drain is installed.

The Northeast tends to have higher labor costs, partly driven by stronger union presence and higher cost of living. Stricter building codes mean more inspection requirements — budget extra for permits.

No Permit Typically Required

French drain installation in Concord generally does not require a permit for standard installations. Check with your local building department if your project involves panel work or structural changes.

How Does Concord's Climate Affect French drain installation?

Freeze protection is critical here. Budget for pipe insulation, heat tape on exposed runs, and deeper trenching below the frost line. Winter plumbing work typically costs more due to frozen ground conditions.

Can You DIY French drain installation or Should You Hire a Pro?

⚠️ Advanced DIY Only

While possible for experienced homeowners, French drain installation involves significant complexity. In Concord, you may still need a licensed pro for permits and inspections. DIY could save $2,317–$2,979 in labor.

How Can You Save Money on French drain installation in Concord?

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Common Questions About French drain installation in Concord

How much does it cost to install a french drain in Concord, NH?

The average cost to install a french drain in Concord ranges from $2,040 to $10,180, with most homeowners paying around $5,090. This estimate includes both labor ($3,310) and materials ($1,780). Costs in Concord are near the national average due to local cost of living and labor market conditions. Get multiple quotes from licensed Concord contractors to lock in the best price.

Is a permit required for French drain installation in Concord?

Concord does not typically require a permit for standard French drain installation. However, projects involving electrical panel work, structural changes, or gas line modifications may still require one. Check with Concord's building department to confirm before starting work.

How long does French drain installation take in Concord?

Most French drain installation projects in Concord take 2–5 days to complete. The timeline depends on project scope, contractor availability in the Concord metro area, and seasonal demand. Scheduling during Concord's off-peak season (typically fall and winter) can reduce wait times and may lower costs.

How long does a French drain last?

A properly installed French drain with filter fabric and quality gravel lasts 20–30+ years. Without filter fabric, fine sediment clogs the gravel and pipe much sooner. Using perforated PVC pipe (not corrugated) also extends lifespan significantly.

Can I install a French drain myself?

A simple exterior French drain is a feasible DIY project if you're comfortable with heavy digging. You'll need to rent a trencher ($200–$300/day), buy drainage gravel and perforated pipe, and maintain proper slope (1% grade). Interior basement drains are best left to professionals.

What Do Other Projects Cost in Concord?

How Much Does French drain installation Cost in Nearby Cities?

Install a French Drain in Manchester, NH — $5,310 Install a French Drain in Nashua, NH — $5,390
Published March 2025 · Updated April 14, 2026 · Cost data based on local labor rates and market conditions in the Concord metropolitan area.