Expert ADU builder offering detached ADUs, garage conversions & backyard cottages. Structured process: feasibility, permits, construction & final walkthrough. Boost property value, enable multigenerational living & create flexible spaces.
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Licensed ADU contractor and construction management firm for NYC homeowners. We handle eligibility, permitting, and the full build across Queens, Brooklyn, Staten Island, and the Bronx.
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GTG Custom Home Builders specializes in ADU construction in Central New Jersey. They build detached ADUs, garage conversions & in-law suites, navigating local zoning & permits to expand your property's living space.
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Huts offers full-service ADU design and build, handling zoning, permits, and construction. Their flexible designs suit in-law suites, rentals, or guest stays. Transparent pricing, cost control, and financing guidance help property owners maximize value.
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ADU Remodeling New York offers full-service interior & exterior home renovation, including kitchen remodeling, bathroom remodeling, and flooring installation. Serving residential clients with expert design-to-completion project management.
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New Hampton Construction builds custom ADUs on Long Island, including in-law suites, guest houses, rental units & home offices. Projects range from $100K–$300K+, take 4–8 months, and may qualify for Plus One ADU Program grants.
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Quality Renovations provides expert Kitchen and Bathroom Remodeling, home additions, and full renovation services with dependable craftsmanship.
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Liamar is a New Jersey contractor building custom garages, ADUs, and accessory structures in Monmouth, Mercer, Ocean, and Burlington counties. Services include permits, foundations, electrical, plumbing, and HVAC — fully code-compliant.
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SLK Buildings offers end-to-end ADU financing support in NYC, helping homeowners access HPD grants, HELOCs, construction loans, and cash-out refinancing to fund garage conversions, basement ADUs, and backyard additions.
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Cascella and Sons Construction Corp builds home additions and ADUs on Long Island. As a design-build firm, they manage design and construction under one roof, offering garage conversions, in-law suites, and detached ADUs tailored to Cape, Ranch, and Colonial-style homes.
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Haven ADUs is a Brooklyn-based design and project management firm specializing in accessory dwelling units (ADUs). They guide property owners through feasibility, design, permitting, and construction, serving as a single point of contact throughout.
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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.
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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+.
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ADU Advisory is a NYC-based organization led by former Buildings Commissioner Robert LiMandri, helping property owners plan, permit, fund, and build accessory dwelling units (ADUs) across all five boroughs under City of YES regulations.
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Trusted Connecticut ADU builder offering custom, modular & prefab accessory dwelling units. Energy-efficient designs, full permitting support & streamlined build process. Expert navigation of CT zoning laws including Public Act 21-29.
read moreBrooklyn is one of the most densely populated urban areas in the United States, with over 2.7 million residents packed into approximately 71 square miles. This unique characteristic makes Accessory Dwelling Units (ADUs) an increasingly popular solution for homeowners looking to maximize their property's potential. Whether you're looking to create a basement apartment, a garage conversion, or a backyard cottage, finding experienced ADU contractors in Brooklyn, NY is essential to navigating the borough's complex building landscape.
Brooklyn falls under New York City's Department of Buildings (DOB) jurisdiction, which means ADU projects must comply with the NYC Zoning Resolution and the New York City Building Code. Most residential areas in Brooklyn are zoned R1 through R10, and the type of ADU you can build largely depends on your specific zoning district. In 2022, New York State passed legislation making it easier to legalize basement and cellar apartments, which is particularly relevant for Brooklyn's large stock of brownstones and row houses. Skilled Brooklyn ADU contractors must be well-versed in these evolving regulations to ensure your project receives proper permits and approvals.
Given Brooklyn's unique housing stock, the most common ADU types in the borough include:
Hiring the right ADU contractor in Brooklyn can make or break your project. The best contractors will have extensive experience working within New York City's rigorous permitting process and a strong understanding of local building codes. Look for contractors who are:
Due to Brooklyn's high cost of living and labor market, ADU construction costs in the borough tend to be higher than national averages. Homeowners can typically expect to spend between $150,000 and $400,000 depending on the ADU type, size, and scope of work. However, a well-built ADU in Brooklyn can generate significant rental income, often ranging from $2,000 to $4,500 per month, making it a worthwhile long-term investment. Partnering with a reputable Brooklyn ADU contractor ensures your project is completed efficiently, legally, and to the highest standards.