WatertightHub
Westminster, CO

French Drain Installation Cost in Westminster

$1,550 – $6,250

Average french drain installation cost in Westminster · avg $3,900

  • Updated 2026
  • 12 local pros
  • Based on local project data
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At a glance · Westminster
Typical timeline
1–2 days
Permit
Usually required · ~$190
Local soil
expansive clay and bentonite
Freeze-thaw cycles
99 / yr
Local pros
12 available

French Drain Installation cost in Westminster, CO

Perimeter drainage that channels groundwater away from the foundation before it gets in. Below is how it compares with related foundation and drainage work in Westminster.

Service in WestminsterLowAverageHigh
Basement Waterproofing$2,350$5,000$7,600
Foundation Repair$2,250$5,350$8,400
Crawl Space Encapsulation$3,100$5,700$8,300
French Drain InstallationThis page$1,550$3,900$6,250
Sump Pump Installation$650$1,500$2,300

Ranges reflect local labor and expansive clay and bentonite soil conditions. Your quote depends on square footage, access, and severity.

What affects the cost in Westminster

Annual rainfall
16"
Freeze-thaw cycles / yr
99
Frost depth
33"

The expansive clay beneath Westminster expands and contracts with the seasons, prying open cracks that let groundwater into basements and crawl spaces.

Permits in Westminster

Exterior drainage and structural repairs are permitted work here; interior sealing and sump-pump installs frequently are not.

Issuing authority: City of Westminster Permits & Inspections Office · typical fee ~$190

Get matched with french drain installation pros in Westminster

12 established french drain installation companies serve the Westminster area. Tell us about your project and compare free quotes, no obligation.

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French Drain Installation in Westminster: FAQ

How much does french drain installation cost in Westminster?+

In Westminster, french drain installation typically runs $1,550–$6,250, averaging about $3,900. The expansive clay and bentonite soil and 99 freeze-thaw cycles a year are the biggest local price drivers.

Do I need a permit for french drain installation in Westminster?+

Exterior drainage and structural repairs are permitted work here; interior sealing and sump-pump installs frequently are not. Permits are handled by City of Westminster Permits & Inspections Office, with a typical fee around $190.

Is french drain installation worth it in Westminster?+

With 16" of annual rainfall and a 33" frost depth, untreated water intrusion in Westminster tends to worsen each freeze-thaw season, so most homeowners find addressing it early is far cheaper than structural repair later.