Denver, CO
Basement waterproofing and foundation repair costs in Denver
Local cost ranges and contractors for every job that keeps water out ofa Denver home, with the soil, water-table, freeze-thaw, and permit data specific to Denver, CO, not a national average.
What each job costs in Denver, CO
Modeled ranges for the five most common basement and foundation jobs in Denver. Pick a job below for its permit notes, guides, and free quotes.
| Service in Denver | Low | Average | High |
|---|---|---|---|
| Basement Waterproofing | $2,500 | $5,150 | $7,750 |
| Foundation Repair | $2,400 | $5,500 | $8,600 |
| Crawl Space Encapsulation | $3,300 | $5,900 | $8,500 |
| French Drain Installation | $1,650 | $4,000 | $6,350 |
| Sump Pump Installation | $700 | $1,550 | $2,350 |
These ranges are estimates modeled from regional Colorado pricing, not quotes from local projects. What you pay depends on square footage, access, and how severe the problem is, so treat this as a starting point and compare real quotes.
Costs & FAQ by service in Denver
Basement Waterproofing in Denver
Average basement waterproofing · avg $5,150
Interior and exterior systems that stop water seepage through foundation walls and floors.
How much does basement waterproofing cost in Denver?+
In Denver, basement waterproofing typically runs $2,500–$7,750, averaging about $5,150. That range is an estimate modeled from regional Colorado pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for basement waterproofing in Denver?+
Denver requires engineer-stamped construction documents and a geotechnical soils report for underpinning, benching, and shoring designs, and foundation details must show foundation drainage and damp proofing or waterproofing. A Sewer Use and Drainage Permit (SUDP) review runs as a separate process from the building permit and carries its own fees. Permits are issued by Community Planning and Development. Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
Is basement waterproofing worth it in Denver?+
With 18" of annual rainfall and about 134 freeze-thaw cycles a year, untreated water intrusion in Denver tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 1–3 days
- Permit
- Usually required
- Local soil
- Elyria (slow-draining)
- Slow-draining ground
- 11 / 16 sampled points
- Freeze-thaw cycles
- 134 / yr
- Local pros
- 12 available
Foundation Repair in Denver
Average foundation repair · avg $5,500
Fixing cracks, bowing walls, and settlement with piers, anchors, and structural reinforcement.
How much does foundation repair cost in Denver?+
In Denver, foundation repair typically runs $2,400–$8,600, averaging about $5,500. That range is an estimate modeled from regional Colorado pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for foundation repair in Denver?+
Denver requires engineer-stamped construction documents and a geotechnical soils report for underpinning, benching, and shoring designs, and foundation details must show foundation drainage and damp proofing or waterproofing. A Sewer Use and Drainage Permit (SUDP) review runs as a separate process from the building permit and carries its own fees. Permits are issued by Community Planning and Development. Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
Is foundation repair worth it in Denver?+
With 18" of annual rainfall and about 134 freeze-thaw cycles a year, untreated water intrusion in Denver tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 2–5 days
- Permit
- Usually required
- Local soil
- Elyria (slow-draining)
- Slow-draining ground
- 11 / 16 sampled points
- Freeze-thaw cycles
- 134 / yr
- Local pros
- 12 available
Crawl Space Encapsulation in Denver
Average crawl space encapsulation · avg $5,900
Sealing and vapor-barriering a crawl space to control moisture, mold, and wood rot.
How much does crawl space encapsulation cost in Denver?+
In Denver, crawl space encapsulation typically runs $3,300–$8,500, averaging about $5,900. That range is an estimate modeled from regional Colorado pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for crawl space encapsulation in Denver?+
Denver requires engineer-stamped construction documents and a geotechnical soils report for underpinning, benching, and shoring designs, and foundation details must show foundation drainage and damp proofing or waterproofing. A Sewer Use and Drainage Permit (SUDP) review runs as a separate process from the building permit and carries its own fees. Permits are issued by Community Planning and Development. Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
Is crawl space encapsulation worth it in Denver?+
With 18" of annual rainfall and about 134 freeze-thaw cycles a year, untreated water intrusion in Denver tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 1–2 days
- Permit
- Usually required
- Local soil
- Elyria (slow-draining)
- Slow-draining ground
- 11 / 16 sampled points
- Freeze-thaw cycles
- 134 / yr
- Local pros
- 12 available
French Drain Installation in Denver
Average french drain installation · avg $4,000
Perimeter drainage that channels groundwater away from the foundation before it gets in.
How much does french drain installation cost in Denver?+
In Denver, french drain installation typically runs $1,650–$6,350, averaging about $4,000. That range is an estimate modeled from regional Colorado pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for french drain installation in Denver?+
Denver requires engineer-stamped construction documents and a geotechnical soils report for underpinning, benching, and shoring designs, and foundation details must show foundation drainage and damp proofing or waterproofing. A Sewer Use and Drainage Permit (SUDP) review runs as a separate process from the building permit and carries its own fees. Permits are issued by Community Planning and Development. Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
Is french drain installation worth it in Denver?+
With 18" of annual rainfall and about 134 freeze-thaw cycles a year, untreated water intrusion in Denver tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 1–2 days
- Permit
- Usually required
- Local soil
- Elyria (slow-draining)
- Slow-draining ground
- 11 / 16 sampled points
- Freeze-thaw cycles
- 134 / yr
- Local pros
- 12 available
Sump Pump Installation in Denver
Average sump pump installation · avg $1,550
Pump systems that evacuate collected water from a basement or crawl space pit.
How much does sump pump installation cost in Denver?+
In Denver, sump pump installation typically runs $700–$2,350, averaging about $1,550. That range is an estimate modeled from regional Colorado pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for sump pump installation in Denver?+
Denver requires engineer-stamped construction documents and a geotechnical soils report for underpinning, benching, and shoring designs, and foundation details must show foundation drainage and damp proofing or waterproofing. A Sewer Use and Drainage Permit (SUDP) review runs as a separate process from the building permit and carries its own fees. Permits are issued by Community Planning and Development. Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
Is sump pump installation worth it in Denver?+
With 18" of annual rainfall and about 134 freeze-thaw cycles a year, untreated water intrusion in Denver tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- Under 1 day
- Permit
- Usually required
- Local soil
- Elyria (slow-draining)
- Slow-draining ground
- 11 / 16 sampled points
- Freeze-thaw cycles
- 134 / yr
- Local pros
- 12 available
What affects the cost in Denver
Climate: ERA5 reanalysis via Open-Meteo
USDA soil maps put Elyria soils across much of Denver, and 11 of the 16 rated sample points fall in hydrologic groups that shed water slowly. Ground like that pushes rain and snowmelt sideways against foundation walls instead of letting it soak away, and roughly 134 freeze-thaw cycles a year work at any crack that lets it in. Soil varies sharply across Denver, so treat this as the pattern across 17 sampled points rather than a description of your lot.
Soil: USDA NRCS SSURGO · Urban land-Elyria-Denver complex, 3 to 5 percent slopes · 17 points sampled
Permits in Denver
Denver requires engineer-stamped construction documents and a geotechnical soils report for underpinning, benching, and shoring designs, and foundation details must show foundation drainage and damp proofing or waterproofing. A Sewer Use and Drainage Permit (SUDP) review runs as a separate process from the building permit and carries its own fees.
Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
Issuing authority: Community Planning and Development · Official fee schedule · Verified 2026-07-16
See how Denver compares: permit fees in 118 US cities →
82% of basement flood claims in Denver County were filed outside the flood zone →
What puts water in a Denver basement
Denver goes through about 134 freeze-thaw cycles in an average year (ERA5 reanalysis). Each cycle expands the water in saturated soil against foundation walls, and repeated over a winter that frost pressure works cracks open and lets seepage in.
And it is not only a floodplain problem: in Denver County, about 82% of basement flood-insurance claims were filed outside the mapped flood zone, and because flood insurance is mostly bought only inside that zone, the real outside-the-zone share is almost certainly higher.
Sources: climate ERA5 reanalysis via Open-Meteo; soil and water table USDA NRCS SSURGO, 17 points sampled. Water-table figures are modeled seasonal highs, not a reading of one lot.
Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
Issuing authority: Community Planning and Development · Verified 2026-07-16
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Denverbasement & foundation FAQ
Why do basements take on water in Denver?+
Denver sees about 18" of rain a year and roughly 134 freeze-thaw cycles, so water in the soil and frost pressure against the wall are the usual causes. Grading, gutters, and drainage that keep water away from the foundation are the first line of defense.
How much does basement waterproofing cost in Denver?+
As a planning range, basement waterproofing in Denver runs about $2,500–$7,750. That figure is modeled from regional Colorado pricing, not a survey of local jobs, and what you actually pay depends on the method, the size of the basement, and how the water is getting in. Compare real quotes.
Do I need a permit for foundation or waterproofing work in Denver?+
Denver requires engineer-stamped construction documents and a geotechnical soils report for underpinning, benching, and shoring designs, and foundation details must show foundation drainage and damp proofing or waterproofing. A Sewer Use and Drainage Permit (SUDP) review runs as a separate process from the building permit and carries its own fees. Permits are issued by Community Planning and Development. Most residential foundation and waterproofing jobs in Denver fall in the $2,000 to $25,000 valuation tier, where the building permit costs $35 for the first $2,000 plus $8 for each additional $1,000 or fraction thereof, and plan review adds another 50% of the permit fee. Smaller jobs are flat rated: $20 for work valued at $1 to $500 and $35 for $501 to $2,000. Above that, the table continues at $220 for the first $25,000 plus $8 per additional $1,000 up to $50,000, $420 for the first $50,000 plus $7 per $1,000 up to $100,000, and $770 for the first $100,000 plus $5.60 per $1,000 up to $500,000. No state surcharge is listed, and paying by credit or debit card adds a 2.5% service fee.
My home isn't in a flood zone, can the basement still flood in Denver?+
Yes. In Denver County, about 82% of basement flood-insurance claims were filed outside the mapped flood zone, and because flood insurance is mostly bought only inside the zone, the true out-of-zone share is almost certainly higher. Basement water is usually a groundwater problem, which the flood map does not measure.