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 spac... read more
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.
read more
Quality Renovations provides expert Kitchen and Bathroom Remodeling, home additions, and full renovation services with dependable craftsmanship.
read more
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.
read more
Unit Two Development is a Queens-based ADU builder helping NYC homeowners add backyard cottages, garage conversions, basement apartments & interior units. They guide clients from feasibility to construction with expert ADU specialists.
read more
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.
read more
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 more
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.
read more
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.
read more
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 updat... read more
Adé Real Estate is an ADU contractor serving Jersey City, Newark & New York. They offer zoning checks, permit-ready designs, turn-key builds & financing guidance. ADUs can generate $2,000–$3,500+/month rental income & add $150K–$2... read more
Tiny House Titans is a Northeast ADU contractor founded in 2025, offering turn-key services from zoning to final inspection. Units range 200–1,000+ sq ft at $250–$400/sq ft, covering detached ADUs, garage conversions, and JADUs.
read more
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 ... read more
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, a... read more
New York City presents a uniquely challenging landscape for ADU contractors. With some of the most stringent zoning laws, landmark preservation requirements, and building codes in the entire United States, constructing an Accessory Dwelling Unit (ADU) in New York, NY demands specialized expertise. The city's dense urban fabric, aging housing stock, and mix of co-ops, condos, and multi-family brownstones create a one-of-a-kind environment that only experienced ADU builders in New York City can successfully navigate.
New York City's zoning resolution governs where and how ADUs can be built. The city has been gradually expanding ADU-friendly policies, particularly through programs like the NYC Basement Apartment Conversion Pilot Program, which allows homeowners in specific boroughs — including Brooklyn, Queens, and Staten Island — to legally convert basement and cellar units into safe, habitable ADUs. Key regulatory considerations include:
Hiring the right ADU contractor in New York City is critical to a successful project. The best contractors will have direct experience working with the NYC Department of Buildings (DOB), pulling permits, filing plans with a licensed architect or engineer, and passing all required inspections. Look for contractors who are:
Building an ADU in New York City is a significant investment, with costs typically ranging from $150,000 to $400,000 or more depending on the scope, location, and type of unit. However, given NYC's extremely high rental demand and property values, a well-constructed ADU can generate substantial rental income and significantly increase property value. New York City ADU contractors who understand both the technical and financial dimensions of these projects are invaluable partners for homeowners looking to maximize their real estate investment.