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Philadelphia, PA

French Drain Installation Cost in Philadelphia

$1,500 – $6,300

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

  • Updated 2026
  • 12 local pros
  • Based on local project data
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At a glance · Philadelphia
Typical timeline
1–2 days
Permit
Usually required · ~$160
Local soil
clay and shale-derived soil
Freeze-thaw cycles
61 / yr
Local pros
12 available

French Drain Installation cost in Philadelphia, PA

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 Philadelphia.

Service in PhiladelphiaLowAverageHigh
Basement Waterproofing$2,300$5,000$7,650
Foundation Repair$2,200$5,350$8,500
Crawl Space Encapsulation$3,000$5,700$8,400
French Drain InstallationThis page$1,500$3,900$6,300
Sump Pump Installation$650$1,500$2,300

Ranges reflect local labor and clay and shale-derived soil soil conditions. Your quote depends on square footage, access, and severity.

What affects the cost in Philadelphia

Annual rainfall
44"
Freeze-thaw cycles / yr
61
Frost depth
38"

Philadelphia's clay-heavy soil drains slowly and holds water against foundation walls, steadily forcing moisture through cracks and cold joints.

Permits in Philadelphia

Structural foundation work and exterior excavation require a permit; interior waterproofing and minor crack sealing usually do not.

Issuing authority: City of Philadelphia Building & Zoning Department · typical fee ~$160

Get matched with french drain installation pros in Philadelphia

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

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French Drain Installation in Philadelphia: FAQ

How much does french drain installation cost in Philadelphia?+

In Philadelphia, french drain installation typically runs $1,500–$6,300, averaging about $3,900. The clay and shale-derived soil soil and 61 freeze-thaw cycles a year are the biggest local price drivers.

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

Structural foundation work and exterior excavation require a permit; interior waterproofing and minor crack sealing usually do not. Permits are handled by City of Philadelphia Building & Zoning Department, with a typical fee around $160.

Is french drain installation worth it in Philadelphia?+

With 44" of annual rainfall and a 38" frost depth, untreated water intrusion in Philadelphia tends to worsen each freeze-thaw season, so most homeowners find addressing it early is far cheaper than structural repair later.