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Thornton, CO

Sump Pump Installation Cost in Thornton

$700 – $2,300

Average sump pump installation cost in Thornton · avg $1,500

  • Updated 2026
  • 12 local pros
  • Based on local project data
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At a glance · Thornton
Typical timeline
Under 1 day
Permit
Usually required · ~$170
Local soil
expansive clay and bentonite
Freeze-thaw cycles
94 / yr
Local pros
12 available

Sump Pump Installation cost in Thornton, CO

Pump systems that evacuate collected water from a basement or crawl space pit. Below is how it compares with related foundation and drainage work in Thornton.

Service in ThorntonLowAverageHigh
Basement Waterproofing$2,400$5,050$7,650
Foundation Repair$2,300$5,400$8,500
Crawl Space Encapsulation$3,100$5,750$8,400
French Drain Installation$1,550$3,950$6,300
Sump Pump InstallationThis page$700$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 Thornton

Annual rainfall
17"
Freeze-thaw cycles / yr
94
Frost depth
33"

Thornton's expansive clay soil swells when it rains and shrinks in dry spells, and that constant movement is the area's leading cause of foundation cracks and wet basements.

Permits in Thornton

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

Issuing authority: City of Thornton Building & Zoning Department · typical fee ~$170

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12 established sump pump installation companies serve the Thornton area. Tell us about your project and compare free quotes, no obligation.

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Sump Pump Installation in Thornton: FAQ

How much does sump pump installation cost in Thornton?+

In Thornton, sump pump installation typically runs $700–$2,300, averaging about $1,500. The expansive clay and bentonite soil and 94 freeze-thaw cycles a year are the biggest local price drivers.

Do I need a permit for sump pump installation in Thornton?+

Structural foundation work and exterior excavation require a permit; interior waterproofing and minor crack sealing usually do not. Permits are handled by City of Thornton Building & Zoning Department, with a typical fee around $170.

Is sump pump installation worth it in Thornton?+

With 17" of annual rainfall and a 33" frost depth, untreated water intrusion in Thornton tends to worsen each freeze-thaw season, so most homeowners find addressing it early is far cheaper than structural repair later.