Second Key NYC

Second Key NYC is a licensed general contractor specializing in ADU construction across Staten Island, Queens, Brooklyn & the Bronx. Services include design, permitting & builds from $300–$350/sqft, completed in 3–6 months.

Home Quality Remodeling

40 East Midland Avenue, Paramus, NJ 07652 18.7 miles

Licensed Eco-Friendly

Home Quality Remodeling offers full-service ADU construction in New Jersey, including detached ADUs, garage conversions, in-law suites, and granny flats. They handle design, permitting, and building to boost property value and add flexible living space.

SpecLand Group

240-19 Jamaica Avenue, Bellerose, NY 11426 10.6 miles

Licensed

At SpecLand, we bring expertise and innovation to home renovations, with a focus on maximizing both functionality and value in New York’s unique urban landscape. Whether you’re looking to expand your home, create rental opportunities, or update your living space, our team is dedicated to delivering high-quality, customized solutions that meet your specific needs.

Expert Designers

77-16 164th Street, New York, NY 11366 6.6 miles

Expert Designers is an NYC-based ADU architect firm helping homeowners convert garages, basements, and backyards into legal accessory dwelling units. Services include design, permit filing, and construction support under NYC's City of Yes zoning updates.

Alec's Construction

1 South Ocean Avenue, Patchogue, NY 11772 47.9 miles

Alec's Construction builds ADUs on Long Island, including garage conversions, basement units & detached cottages. Serving Suffolk County, they handle permits, design & construction. Costs range from $50K–$300K+.

Other cities in New York

What you need to know

Searching for top Basement Conversion ADU Contractors in New York, New York? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).

Working with a qualified Basement Conversion ADU Contractor in New York ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Basement Conversion professionals can guide you through every step.

New York homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Basement Conversion experts featured here bring local expertise and proven experience to help make your project a success.

Browse our listings to find the best Basement Conversion ADU Contractors in New York, New York, and get started today.

Basement Conversion near New York, NY