Yonkers, NY
Basement waterproofing and foundation repair costs in Yonkers
Local cost ranges and contractors for every job that keeps water out ofa Yonkers home, with the soil, water-table, freeze-thaw, and permit data specific to Yonkers, NY, not a national average.
What each job costs in Yonkers, NY
Modeled ranges for the five most common basement and foundation jobs in Yonkers. Pick a job below for its permit notes, guides, and free quotes.
| Service in Yonkers | Low | Average | High |
|---|---|---|---|
| Basement Waterproofing | $2,600 | $5,850 | $9,100 |
| Foundation Repair | $2,500 | $6,300 | $10,100 |
| Crawl Space Encapsulation | $3,400 | $6,700 | $10,000 |
| French Drain Installation | $1,700 | $4,600 | $7,500 |
| Sump Pump Installation | $750 | $1,750 | $2,750 |
These ranges are estimates modeled from regional New York pricing, not quotes from local projects. What you pay depends on square footage, access, and how severe the problem is, so treat this as a starting point and compare real quotes.
Costs & FAQ by service in Yonkers
Basement Waterproofing in Yonkers
Average basement waterproofing · avg $5,850
Interior and exterior systems that stop water seepage through foundation walls and floors.
How much does basement waterproofing cost in Yonkers?+
In Yonkers, basement waterproofing typically runs $2,600–$9,100, averaging about $5,850. That range is an estimate modeled from regional New York pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for basement waterproofing in Yonkers?+
Structural foundation work and exterior excavation generally require a permit, while interior waterproofing and minor crack sealing often do not. Requirements and fees are set locally, so confirm with your city or county building department before work starts. Permits are issued by City of Yonkers Department of Housing and Buildings (DHB). Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
Is basement waterproofing worth it in Yonkers?+
With 49.9" of annual rainfall and about 69 freeze-thaw cycles a year, untreated water intrusion in Yonkers tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 1–3 days
- Water table rises to
- ~2 ft · above basement floor
- Permit
- Usually required
- Local soil
- Transquaking (slow-draining)
- Slow-draining ground
- 8 / 13 sampled points
- Freeze-thaw cycles
- 69 / yr
- Local pros
- 12 available
Foundation Repair in Yonkers
Average foundation repair · avg $6,300
Fixing cracks, bowing walls, and settlement with piers, anchors, and structural reinforcement.
How much does foundation repair cost in Yonkers?+
In Yonkers, foundation repair typically runs $2,500–$10,100, averaging about $6,300. That range is an estimate modeled from regional New York pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for foundation repair in Yonkers?+
Structural foundation work and exterior excavation generally require a permit, while interior waterproofing and minor crack sealing often do not. Requirements and fees are set locally, so confirm with your city or county building department before work starts. Permits are issued by City of Yonkers Department of Housing and Buildings (DHB). Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
Is foundation repair worth it in Yonkers?+
With 49.9" of annual rainfall and about 69 freeze-thaw cycles a year, untreated water intrusion in Yonkers tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 2–5 days
- Water table rises to
- ~2 ft · above basement floor
- Permit
- Usually required
- Local soil
- Transquaking (slow-draining)
- Slow-draining ground
- 8 / 13 sampled points
- Freeze-thaw cycles
- 69 / yr
- Local pros
- 12 available
Crawl Space Encapsulation in Yonkers
Average crawl space encapsulation · avg $6,700
Sealing and vapor-barriering a crawl space to control moisture, mold, and wood rot.
How much does crawl space encapsulation cost in Yonkers?+
In Yonkers, crawl space encapsulation typically runs $3,400–$10,000, averaging about $6,700. That range is an estimate modeled from regional New York pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for crawl space encapsulation in Yonkers?+
Structural foundation work and exterior excavation generally require a permit, while interior waterproofing and minor crack sealing often do not. Requirements and fees are set locally, so confirm with your city or county building department before work starts. Permits are issued by City of Yonkers Department of Housing and Buildings (DHB). Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
Is crawl space encapsulation worth it in Yonkers?+
With 49.9" of annual rainfall and about 69 freeze-thaw cycles a year, untreated water intrusion in Yonkers tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 1–2 days
- Water table rises to
- ~2 ft · above basement floor
- Permit
- Usually required
- Local soil
- Transquaking (slow-draining)
- Slow-draining ground
- 8 / 13 sampled points
- Freeze-thaw cycles
- 69 / yr
- Local pros
- 12 available
French Drain Installation in Yonkers
Average french drain installation · avg $4,600
Perimeter drainage that channels groundwater away from the foundation before it gets in.
How much does french drain installation cost in Yonkers?+
In Yonkers, french drain installation typically runs $1,700–$7,500, averaging about $4,600. That range is an estimate modeled from regional New York pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for french drain installation in Yonkers?+
Structural foundation work and exterior excavation generally require a permit, while interior waterproofing and minor crack sealing often do not. Requirements and fees are set locally, so confirm with your city or county building department before work starts. Permits are issued by City of Yonkers Department of Housing and Buildings (DHB). Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
Is french drain installation worth it in Yonkers?+
With 49.9" of annual rainfall and about 69 freeze-thaw cycles a year, untreated water intrusion in Yonkers tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- 1–2 days
- Water table rises to
- ~2 ft · above basement floor
- Permit
- Usually required
- Local soil
- Transquaking (slow-draining)
- Slow-draining ground
- 8 / 13 sampled points
- Freeze-thaw cycles
- 69 / yr
- Local pros
- 12 available
Sump Pump Installation in Yonkers
Average sump pump installation · avg $1,750
Pump systems that evacuate collected water from a basement or crawl space pit.
How much does sump pump installation cost in Yonkers?+
In Yonkers, sump pump installation typically runs $750–$2,750, averaging about $1,750. That range is an estimate modeled from regional New York pricing rather than local project data, and the size of the job, access to the foundation, and how far the damage has progressed matter more than any regional average.
Do I need a permit for sump pump installation in Yonkers?+
Structural foundation work and exterior excavation generally require a permit, while interior waterproofing and minor crack sealing often do not. Requirements and fees are set locally, so confirm with your city or county building department before work starts. Permits are issued by City of Yonkers Department of Housing and Buildings (DHB). Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
Is sump pump installation worth it in Yonkers?+
With 49.9" of annual rainfall and about 69 freeze-thaw cycles a year, untreated water intrusion in Yonkers tends to worsen each season, so most homeowners find addressing it early is far cheaper than structural repair later.
- Typical timeline
- Under 1 day
- Water table rises to
- ~2 ft · above basement floor
- Permit
- Usually required
- Local soil
- Transquaking (slow-draining)
- Slow-draining ground
- 8 / 13 sampled points
- Freeze-thaw cycles
- 69 / yr
- Local pros
- 12 available
What affects the cost in Yonkers
Climate: ERA5 reanalysis via Open-Meteo
USDA soil maps put Transquaking soils across much of Yonkers, and 8 of the 13 rated sample points fall in hydrologic groups that shed water slowly. Ground like that pushes rain and snowmelt sideways against foundation walls instead of letting it soak away, and roughly 69 freeze-thaw cycles a year work at any crack that lets it in. Soil varies sharply across Yonkers, so treat this as the pattern across 17 sampled points rather than a description of your lot.
Soil: USDA NRCS SSURGO · Udorthents, wet substratum-Urban land complex · 17 points sampled
Permits in Yonkers
Structural foundation work and exterior excavation generally require a permit, while interior waterproofing and minor crack sealing often do not. Requirements and fees are set locally, so confirm with your city or county building department before work starts.
Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
Issuing authority: City of Yonkers Department of Housing and Buildings (DHB) · Official fee schedule · Verified 2026-07-16
See how Yonkers compares: permit fees in 118 US cities →
41% of basement flood claims in Westchester County were filed outside the flood zone →
What puts water in a Yonkers basement
The ground under Yonkers holds water close to the surface: in a typical year the seasonal-high water table modeled from USDA soil survey rises to within about 2 ft of grade, shallower than the roughly 7 ft depth of a full basement floor. Where groundwater stands above the floor it presses on the slab and the wall-floor joint, the hydrostatic pressure that drives water through basement concrete.
The soil compounds it: 8 of 13 sampled points are slow-draining ground that holds water rather than shedding it.
And it is not only a floodplain problem: in Westchester County, about 41% of basement flood-insurance claims were filed outside the mapped flood zone, and because flood insurance is mostly bought only inside that zone, the real outside-the-zone share is almost certainly higher.
Sources: climate ERA5 reanalysis via Open-Meteo; soil and water table USDA NRCS SSURGO, 17 points sampled. Water-table figures are modeled seasonal highs, not a reading of one lot.
Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
Issuing authority: City of Yonkers Department of Housing and Buildings (DHB) · Verified 2026-07-16
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Yonkersbasement & foundation FAQ
Why do basements take on water in Yonkers?+
The main driver in Yonkers is groundwater. The seasonal-high water table (modeled from USDA soil survey) rises to about 2 ft below grade, shallower than a typical 7 ft basement floor, so at its peak it presses up against the slab and in at the wall-floor joint. Roughly 69 freeze-thaw cycles a year add frost pressure on top of that.
How much does basement waterproofing cost in Yonkers?+
As a planning range, basement waterproofing in Yonkers runs about $2,600–$9,100. That figure is modeled from regional New York pricing, not a survey of local jobs, and what you actually pay depends on the method, the size of the basement, and how the water is getting in. Compare real quotes.
Do I need a permit for foundation or waterproofing work in Yonkers?+
Structural foundation work and exterior excavation generally require a permit, while interior waterproofing and minor crack sealing often do not. Requirements and fees are set locally, so confirm with your city or county building department before work starts. Permits are issued by City of Yonkers Department of Housing and Buildings (DHB). Yonkers prices building permits off the estimated construction cost, rounded up to the nearest $1,000. Under the City of Yonkers DHB Fee Schedule (effective 7/1/2019 and still the posted current schedule as of July 2026), a basement waterproofing or foundation repair job on a 1- or 2-family home is filed as an alteration: $125.00 filing fee plus $15.00 per $1,000 of estimated cost up to $1,000,000, and $12.00 per $1,000 or part thereof above that, with half the total due at filing (nonrefundable) and the balance before the permit is issued. If the work involves excavation, soil removal, or fill, a separate excavation permit fee applies, $1,000.00 flat for volumes up to 20,000 cubic yards or topsoil removal up to 5,000 square feet, rising to $1,500.00 plus $0.25 per additional cubic yard or square foot beyond that, and alterations also carry a $0.01-per-square-foot operating trust fund surcharge computed on under-roof floor space.
My home isn't in a flood zone, can the basement still flood in Yonkers?+
Yes. In Westchester County, about 41% of basement flood-insurance claims were filed outside the mapped flood zone, and because flood insurance is mostly bought only inside the zone, the true out-of-zone share is almost certainly higher. Basement water is usually a groundwater problem, which the flood map does not measure.