How much does basement waterproofing cost?
Waterproofing stops a wet or leaking basement. Interior sealing is cheapest; an interior drainage system with a sump is mid-range; full exterior excavation and membrane is the most involved.
| Typical range | $2,000 – $12,000 |
| Most common | $5,000 |
| Priced | average basement |
| DIY-friendly? | No — best left to a licensed pro |
What changes the price of basement waterproofing
- Interior sealing vs. drainage system vs. exterior excavation
- Linear feet treated
- Adding or upgrading a sump pump
- Severity of water intrusion
Estimate your cost
Adjust the quality and scope, or compare with other projects.
Full typical range for this project. Adjust the quality/scope for a tighter estimate. The only way to know your real price is to get quotes from local contractors.
- ›Interior sealing vs. drainage system vs. exterior excavation
- ›Linear feet treated
- ›Adding or upgrading a sump pump
- ›Severity of water intrusion
National ballpark ranges for the US. Not a quote — actual prices vary by region, home and contractor.
Basement waterproofing cost — frequently asked questions
How much does basement waterproofing cost?
Basement waterproofing runs about $2,000–$12,000, around $5,000 typical. Simple interior sealing is cheapest; interior drainage with a sump is mid-range; exterior excavation costs the most.
Related project costs
This is general US cost information, not a quote. Actual prices depend on your region, home, materials and contractor — always get quotes from licensed local pros before you commit.