914 Basement Remodeling in Armonk & North Castle, NY
Armonk (Town of North Castle) skews newer than the coastal villages: the typical home was built around 1989, though 43% still pre-date 1980. On large wooded lots, drainage and grading often matter more than the basement wall itself. Westchester County requires home improvement contractors to hold a county license, and the county does not show license numbers in its public search, so we list the license expiry we found in the county's online search and note when a number comes from the company's own site. Plumbing and electrical work in a remodel may need separately licensed trades. Your town or village building department sets permit and inspection rules, so ask which permits apply before work starts.
Remodeling companies for Armonk & North Castle
How we pick: we list up to six companies per page. Independent firms come first, then firms based outside Westchester, then franchise or network affiliates. Companies that name the town as served come before those that serve the whole county. Listings are free, not paid, and not an endorsement. Home improvement license status was looked up in the Westchester County consumer license search on Oct 26 to 27, 2026, plumber license status in the county trade license search on Oct 27, 2026, and NYS mold license status in the state Labor Department data set; each profile shows what we found.
Mazzacone Contracting
No rating collected yetInterior and exterior waterproofing, drainage, sump pumps, excavation
Ant's Do It All Construction
No rating collected yetResidential and commercial construction, basement renovations
Benjamin Rose Build & Design
No rating collected yetBasement remodeling and finishing, design-build
Fernandez Home Solutions
No rating collected yetGeneral contracting, basement remodeling, kitchens, baths, masonry
Luigi Building & Remodeling
No rating collected yetHome remodeling and basement construction
Riverview General Contractors
No rating collected yetBasement remodeling and finishing, kitchen and home remodeling, roofing
Housing in Armonk & North Castle
| Place | Typical year built | Built before 1950 | Built before 1980 | Median home value |
|---|---|---|---|---|
| Armonk | 1989 | 13.6% | 43.2% | $1,073,300 |
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (tables B25035, B25034, B25077), retrieved Oct 2026. Estimates carry a margin of error.
Flooding and water in Armonk & North Castle
- Westchester County’s Long Island Sound watershed program lists this municipality in the watershed study areas for “Silvermine, Mill and Mianus Rivers”, “Byram River”, “Bronx River”. [source]
- The town publishes a floodplain development permit application for work in flood hazard areas. [source]
- Flood maps are address-specific. Check your own address on FEMA’s flood map service, and ask any contractor how they treat a high water table on your lot. [source]
Permit notes for Armonk & North Castle
From the municipality’s own pages, retrieved Oct 2026. Rules change, so call the building department before work starts.
- Excavation and related work need a building permit from the Town of North Castle Building Department, 17 Bedford Road, (914) 273-3000 ext. 44. [source]
- A sump pump that ties into drainage, a floor drain or a sewage ejector may need a plumbing permit. [source]
- Excavation, grading and watercourse work can trigger town stormwater review. [source]
What it costs
A modeled estimate for White Plains puts basement finishing at $26 to $84 per square foot, with a planning midpoint near $52 (RenoVetted). For an 800 square foot basement that works out to about $41,872, with comparable bids roughly $20,936 to $66,995. Nationally, HomeGuide cites $30 to $50 per square foot, or $15,000 to $75,000 for 500 to 1,500 square feet. These are modeled and national figures, not Westchester bid data, and we did not find any Westchester contractor price lists. Full cost guide with sources.
Frequently asked questions
How many remodeling companies serve Armonk & North Castle?
We show 6 of 9 companies we found for Armonk & North Castle: 2 name Armonk & North Castle as an area they serve, and the rest serve all of Westchester County. Always confirm a company covers your address.
Does Armonk & North Castle require a permit for this work?
Often yes. See the permit notes on this page, then call the Armonk & North Castle building department before you sign a contract.
Do I need a permit to finish a basement?
HomeGuide says a permit is required before work begins and typically costs $200 to $1,000, though some places charge a percentage of project cost. Rules and fees are set locally, so ask your town or village building department.
Should I fix water problems before finishing?
Yes. A wet basement can ruin new flooring and drywall. RenoVetted's White Plains guide suggests asking about interior drainage, rigid foam against the foundation and a dehumidifier, and lists waterproofing among typical basement finishing costs.
Nearby
Sources
- Westchester County Planning: Long Island Sound Watershed Program (watershed study areas by municipality)
- Town of North Castle: Floodplain Development Permit Application
- FEMA Flood Map Service Center (look up your own address)
- Town of North Castle: Building Applications & Information
- Town of North Castle: Plumbing Permit Application
- Town of North Castle Code, Chapter 267: Stormwater Management
- U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, tables B25034, B25035, B25077 (via Census Reporter)
Get up to 3 quotes in Armonk & North Castle
Tell us about your project and we'll connect you with local pros. Free, no obligation.
Start my free quote request