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Allentown, PA

French Drain Installation Cost in Allentown

$1,550 – $6,100

Average french drain installation cost in Allentown · avg $3,850

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

French Drain Installation cost in Allentown, 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 Allentown.

Service in AllentownLowAverageHigh
Basement Waterproofing$2,350$4,900$7,450
Foundation Repair$2,250$5,250$8,250
Crawl Space Encapsulation$3,100$5,650$8,150
French Drain InstallationThis page$1,550$3,850$6,100
Sump Pump Installation$650$1,450$2,250

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 Allentown

Annual rainfall
41"
Freeze-thaw cycles / yr
58
Frost depth
38"

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

Permits in Allentown

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

Issuing authority: City of Allentown Department of Buildings · typical fee ~$160

Get matched with french drain installation pros in Allentown

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

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French Drain Installation in Allentown: FAQ

How much does french drain installation cost in Allentown?+

In Allentown, french drain installation typically runs $1,550–$6,100, averaging about $3,850. The clay and shale-derived soil soil and 58 freeze-thaw cycles a year are the biggest local price drivers.

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

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

Is french drain installation worth it in Allentown?+

With 41" of annual rainfall and a 38" frost depth, untreated water intrusion in Allentown tends to worsen each freeze-thaw season, so most homeowners find addressing it early is far cheaper than structural repair later.