914 Basement Waterproofing Cost in Westchester, NY
Short answer
A modeled estimate for White Plains puts a typical interior drain system for about 120 linear feet of wall near $7,100, with most bids between roughly $3,000 and $12,200 (RenoVetted). Exterior drainage is modeled at $4,600 to $18,200 and full exterior waterproofing at $5,700 to $22,800 for the same 120 feet. These are modeled figures, not Westchester bid data, and larger or harder-to-access homes can cost more. We did not find any Westchester contractor price lists.
Published cost ranges
| Item | Range | Source |
|---|---|---|
| Typical interior drain system, 120 ft of wall (low / typical / high) | $3,041 / $7,095 / $12,163 | RenoVetted |
| Per linear foot, White Plains (low / typical / high) | $32 / $74 / $127 | RenoVetted |
| Interior sealant, 120 ft (modeled range) | $760 to $3,041 | RenoVetted |
| Interior French drain, 120 ft (modeled range) | $3,041 to $12,163 | RenoVetted |
| Exterior drainage, 120 ft (modeled range) | $4,561 to $18,244 | RenoVetted |
| Full exterior waterproofing, 120 ft (modeled range) | $5,701 to $22,805 | RenoVetted |
| Minor foundation crack repairs and basic waterproofing, White Plains | $2,400 to $4,700 | HomeBlue |
These are published estimates retrieved October 2026, not quotes from 914 Basement. Your price depends on your house.
Modeled sources combine national cost data with a local labor factor (about 9% above the national average for White Plains and Yonkers); they are not surveys of Westchester bids. Actual quotes for Westchester homes, especially large houses, finished basements and hard-to-access sites, may be higher. Get written quotes.
What drives the price
- Linear feet of wall that need drainage
- Foundation type: stone and brick walls in older homes often need repointing first
- Interior vs. exterior approach, and excavation access around landscaping, patios and tight lots
- Finished space that must be removed and restored
- Pump model, backup and discharge routing
- Fixing gutters, downspouts and grading first, which often costs far less than a drain system
Frequently asked questions
Why do quotes vary so much?
Companies propose different scopes. Compare linear footage, the drainage method, pump model and warranty, not just the total.
Is the cheapest quote OK?
It can be, if the scope is the same. Westchester County's consumer protection office advises being wary of an extremely low bid and not automatically choosing the low bidder.
Should I fix gutters and grading first?
Often yes. Downspout extensions and regrading usually cost far less than drain systems and can reduce water at the foundation.
Sources
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