Cost to waterproof a basement in San Antonio, TX (2026)
The cost to waterproof a basement in San Antonio, TX averages about $5,700, though real quotes vary from $2,900 to $11,500 depending on the specifics of your home. Prices here sit close to the national average.
What drives the cost
- Interior vs. exterior method
- Linear feet of foundation
- Sump pump and drainage needs
- Severity of water intrusion
What's typically included
- Interior drainage or sealing
- Sump pump if needed
- Vapor barrier
- Labor and cleanup
Where the money typically goes
As a rough rule of thumb for outdoor and specialty projects, quotes tend to break down like this — actual splits vary by contractor and scope:
How to get the best price in San Antonio
Get 2–3 itemized quotes from licensed, insured local pros and compare the same scope and materials. Ask about off-season timing and bundling related work. The lowest bid isn't always the best value — check reviews, licensing and warranty.
Local factors in San Antonio, TX
San Antonio's limestone-heavy soil (part of the Edwards Plateau/Hill Country geology) behaves differently from the clay soils common elsewhere in Texas, and can affect foundation work and drainage planning. The region's hail exposure has also pushed many insurers toward incentivizing or requiring impact-resistant roofing.
Frequently asked questions
How much does it cost to waterproof a basement in San Antonio, TX?
In San Antonio, TX, it typically costs $2,900 to $11,500, with an average of about $5,700. Your exact price depends on interior vs. exterior method and linear feet of foundation.
What affects the price the most?
The biggest cost drivers are: Interior vs. exterior method; Linear feet of foundation; Sump pump and drainage needs; Severity of water intrusion. Getting 2–3 itemized quotes is the best way to see how these apply to your specific project.
What's usually included?
A standard quote to waterproof a basement generally includes: Interior drainage or sealing; Sump pump if needed; Vapor barrier; Labor and cleanup. Always confirm what's in (and out of) scope before signing.
How can I save money?
Get multiple quotes, ask about off-season scheduling, bundle related work, and make sure you're comparing the same scope and materials. The cheapest bid isn't always the best value — check licensing, insurance and reviews.
Are these prices exact?
No — they're estimated local ranges for planning, derived from national averages adjusted for San Antonio, TX costs. For an exact number, get a free in-person quote from a local pro.