Basement Waterproofing Cost in Houston (2026)
Average cost in Houston
$3,500 – $8,000
$4 – $13 per sq ft
In Houston, the average is $5,490 and most projects cost between $3,500 and $8,000, or about $4 – $13 per sq ft. Prices are before tax and based on 6 sources.
Cost Breakdown
ItemizedExcavation and professional installation
45%
Sealants, membranes, and drainage pipes
30%
Unit and backup battery installation
15%
City of Houston building permits
5%
Debris removal and site restoration
5%
Sales Tax at 6.25%
📋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 Houston
Likely range $3,500 – $8,000
- Labor45%$2,471
- Materials30%$1,647
- Sump Pump System15%$824
- Permits & Inspections5%$275
- Disposal & Cleanup5%$275
Interior sealant
$5,490
Interior drainage / weeping tile
$8,784
Exterior excavation
$13,176
Calibrated to 6 researched sources for Houston. Before tax. Real quotes vary with site conditions.
📈Price Momentum
Year-over-year~1 year ago
$5,274
Today
$5,490
Basement Waterproofing in Houston is ↑ 4.1% compared to roughly a year ago — about $216 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 Houston
Verified providersCutting Edge Foundation Repair
2850 S Sam Houston Pkwy E, Houston, TX 77047, USA
243 reviews
Hinojosa Waterproofing, LLC.
6125 W Gulf Bank Rd, Houston, TX 77088, USA
47 reviews
R.L.NELSON Foundation Solutions - Commercial
8522 Coolidge St, Houston, TX 77012, USA
37 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
Waterproofing in Houston costs roughly 25% more than the national average. This is due to the rarity of basements in Texas, which limits the number of specialized contractors, and the high demand for flood-prevention services in a hurricane-prone climate.
Houston's expansive clay soil puts significant hydrostatic pressure on foundations. Addressing this often requires more robust exterior membranes and drainage solutions, which can push costs toward the high end of the $3.75–$12.50 per sq ft range.
Interior waterproofing, which manages water already inside, averages around $3,750. Exterior waterproofing, which involves excavation to prevent water entry, is a more permanent solution but averages significantly higher at approximately $8,750.
A professional sump pump installation in Houston typically ranges from $800 to $3,000. Given the city's propensity for flash flooding, most experts recommend a submersible pump with a battery backup, which usually falls in the $1,200 to $2,500 range.
📊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: 3 weeks 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.
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