Detached ADU in New York

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.

Timber Design & Build constructs ADUs across Hudson Valley, NY, serving Ulster, Dutchess, Orange & Sullivan counties. Offering detached, attached, garage conversions & over-garage units. Costs range $120–$400/sqft. Rental income pote... read more

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.

NYC's 2024 City of Yes zoning reform introduced ADUs, allowing homeowners to add units in attics, basements, or backyards. Situ Studio contributed a pre-approved 280 sq. ft. detached micro-loft ADU design using Wikihouse's open-source plywood fram... 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.

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.

Two Stories Woodworking LLC, Suffolk NY's trusted ADU builder & remodeling contractor. Specializing in kitchen, bathroom, basement remodels, home additions & accessory dwelling units. 350+ homes transformed with expert craftsmanship & ... read more

OneBuild is a Hudson Valley ADU firm founded in 2025, managing full-scope projects including feasibility, permitting, design, prefab selection, and installation of backyard cottages, in-law suites, and granny flats.

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.

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

Kondor NYC offers ADU design & installation, including attached, detached units & garage conversions. Ideal for in-law suites, rental income or guest houses. Serving NYC homeowners with expert remodeling solutions on time & within budg... read more

Pro Contracting Services offers home additions & room conversions in Buffalo, Amherst, Clarence, Hamburg & beyond. Services include ADUs, in-law suites, sunrooms, second-story additions & room conversions tailored to each property.

ADU Haus NY builds fully permitted accessory dwelling units in New York City. Founded by Elai Azour, they handle design, DOB filings, and installation, ensuring compliance with NYC's City of Yes initiative and Local Laws 126 and 127.

DEN Outdoors offers modern house plans & prefab kits since 2020, including 40+ designs like cabins, A-frames & ADUs. Their 3-step process starts at $999, with building packages from $1,999 or prefab kits from $133K.

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.