Aldo

Accessory dwelling units

Can you build an ADU in New York? Rules by town.

Whether you can add an accessory dwelling unit (ADU) — an in-law suite, a converted garage, a backyard cottage — is decided lot by lot, by your zoning district. We map the code for 367 towns and cities across 15 New York counties. Find your town below, or check a specific address:

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Albany County

Columbia County

Delaware County

Dutchess County

Erie County

Greene County

Monroe County

Orange County

Putnam County

Rensselaer County

Rockland County

Saratoga County

Sullivan County

Ulster County

Westchester County

ADU information is compiled from municipal codes and provided for decision-support only — not legal or architectural advice. Eligibility, size, owner-occupancy and permit conditions vary by district and often carry exceptions; verify with the municipality before relying on any answer.

Building outside these counties?

Aldo covers 10 Hudson Valley & Capital Region counties today. Tell us your market — we'll build the zoning + feasibility data for it.