Basement Remodeling in Harrison, NY

Harrison is a mid-century town: the typical home was built around 1962 and 68% pre-date 1980, with a median value just over $1 million. Several brooks and rivers run through it. 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 Harrison

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.

Housing in Harrison

PlaceTypical year builtBuilt before 1950Built before 1980Median home value
Harrison196226.1%67.7%$1,010,700

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 Harrison

Permit notes for Harrison

From the municipality’s own pages, retrieved Oct 2026. Rules change, so call the building department before work starts.

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 Harrison?

We show 6 of 8 companies we found for Harrison: 2 name Harrison as an area they serve, and the rest serve all of Westchester County. Always confirm a company covers your address.

Does Harrison require a permit for this work?

Often yes. See the permit notes on this page, then call the Harrison 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

  1. Westchester County Planning: Long Island Sound Watershed Program (watershed study areas by municipality)
  2. Town/Village of Harrison Code, Chapter 146: Flood Damage Prevention
  3. FEMA Flood Map Service Center (look up your own address)
  4. Town/Village of Harrison: Building Department
  5. U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, tables B25034, B25035, B25077 (via Census Reporter)

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