Basement Waterproofing Cost in Denver (2026)
Average cost in Denver
$2,100 – $12,500
$4 – $11 per sq ft
In Denver, the average is $4,965 and most projects cost between $2,100 and $12,500, or about $4 – $11 per sq ft. Prices are before tax and based on 8 sources.
Cost Breakdown
ItemizedSkilled waterproofing technicians ($95-$165/hr)
45%
Membranes, sealants, and drainage pipes
30%
Heavy machinery for exterior work
15%
Unit and basin installation
7%
Denver Community Planning & Development fees
3%
Sales Tax at 2.9%
📋What's Included
ScopeTypically Includes
- Interior drain tile system
- Sump pump installation
- Vapor barrier
- Crack injection sealing
- Labor
Typically Excludes
- Exterior excavation waterproofing
- Foundation repair
- Mold remediation
- Dehumidifier
- Landscaping restoration
Based on interior waterproofing for a standard 800-1,000 sq ft basement.
🧮Estimate your project
LiveYour estimate in Denver
Likely range $2,234 – $10,923
- Labor45%$2,234
- Materials30%$1,490
- Equipment & Excavation15%$745
- Sump Pump System7%$348
- Permits & Inspections3%$149
Interior sealant
$4,965
Interior drainage / weeping tile
$7,944
Exterior excavation
$11,916
Calibrated to 8 researched sources for Denver. Before tax. Real quotes vary with site conditions.
📈Price Momentum
Year-over-year~1 year ago
$4,740
Today
$4,965
Basement Waterproofing in Denver is ↑ 4.8% compared to roughly a year ago — about $225 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Waterproofing Contractors in Denver
Verified providersLiftech Concrete Stabilization Systems
12870 W Alameda Pkwy, Lakewood, CO 80228, USA
1,172 reviews
Thrasher Foundation & Concrete Repair
9652 Hanover Ct W, Henderson, CO 80640, USA
896 reviews
Colorado Structural Repair
3195 S Zuni St, Englewood, CO 80110, USA
260 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Denver's expansive clay soils expand when wet and shrink when dry, putting significant hydrostatic pressure on foundations. This often requires more robust drainage solutions like interior French drains, which typically cost between $4,000 and $15,000 depending on the basement's perimeter.
Interior waterproofing, which manages water after it enters, averages around $3,000 in Denver. Exterior waterproofing, which involves full excavation to prevent water entry, is significantly more expensive, averaging $7,000 to $12,000 due to high labor and equipment costs.
The average cost for a professional sump pump installation in Denver is approximately $1,100, with a typical range of $858 to $1,204. Adding a battery backup system, highly recommended for Colorado's spring storm season, can add $1,500 to $3,500 to the total.
Yes, any work involving foundation alteration or new drainage systems requires a permit from the City of Denver. Fees are based on project value but generally range from $150 to $500 for standard residential waterproofing jobs.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 1 months ago. Updates run weekly. All costs in USD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.