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Trenton, NJ

French Drain Installation Cost in Trenton

$1,900 – $7,500

Average french drain installation cost in Trenton · avg $4,700

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

French Drain Installation cost in Trenton, NJ

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 Trenton.

Service in TrentonLowAverageHigh
Basement Waterproofing$2,900$6,050$9,150
Foundation Repair$2,800$6,500$10,150
Crawl Space Encapsulation$3,800$6,900$10,000
French Drain InstallationThis page$1,900$4,700$7,500
Sump Pump Installation$800$1,800$2,750

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

What affects the cost in Trenton

Annual rainfall
44"
Freeze-thaw cycles / yr
54
Frost depth
39"

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

Permits in Trenton

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

Issuing authority: City of Trenton Building & Zoning Department · typical fee ~$190

Get matched with french drain installation pros in Trenton

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

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French Drain Installation in Trenton: FAQ

How much does french drain installation cost in Trenton?+

In Trenton, french drain installation typically runs $1,900–$7,500, averaging about $4,700. The clay and coastal-plain soil soil and 54 freeze-thaw cycles a year are the biggest local price drivers.

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

Structural foundation work and exterior excavation require a permit; interior waterproofing and minor crack sealing usually do not. Permits are handled by City of Trenton Building & Zoning Department, with a typical fee around $190.

Is french drain installation worth it in Trenton?+

With 44" of annual rainfall and a 39" frost depth, untreated water intrusion in Trenton tends to worsen each freeze-thaw season, so most homeowners find addressing it early is far cheaper than structural repair later.