The same silence runs through local ADU zoning

This is not a quirk of one programme. It is how New York ADU law is being written, and the pattern is consistent enough to be a finding in itself.

Westchester County promotes a model ADU ordinance aimed at respecting “the look and scale of single-dwelling development,” offering “environmentally friendly housing choices with less average space per person,” and “limiting the square footage of the ADU and restricting front facing entrances and outdoor fire stairs.” The county page notes that “Certain Westchester municipalities have signaled support for ADUs in their plans and have adopted zoning regulations that permit ADUs in single family residential areas” — and contains no language at all on private covenants, deed restrictions or associations.³

At the village level the picture is the same. Croton-on-Hudson adopted its ADU legislation — Local Law Introductory No. 21 of 2023 — on January 10, 2024, addressing accessory apartments and permitting accessory cottages in certain areas.⁴ Mount Kisco's ADU page presents draft legislation requiring an ADU to be “a minimum of 400 sq ft” and no larger than “30% of the total useable square footage,” with the owner required “to live on the property, as their primary residence, in either unit” — and no mention of covenants.⁵

North Castle went from no short-term rental regulation to regulation in March 2026 by Local Law No. 2 of 2026, and two months earlier amended its code to permit Level 3 EV charging by Local Law No. 1 of 2026, adopted February 11, 2026.⁶

The legal point, stated carefully

Zoning that permits a use does not authorise it against a private covenant. A village that allows ADUs has removed a public-law obstacle; it has not amended anybody's declaration. That is ordinary New York law and it is not controversial.

What is new is the volume of homeowners who are about to encounter it, and the fact that a state-funded ADU adds a second recorded instrument to the problem. A homeowner who builds an unpermitted-by-covenant ADU has a covenant dispute. A homeowner who builds a state-funded ADU has a covenant dispute plus a recorded ten-year affordability agreement they cannot simply walk away from, plus “declining balance enforcement documents” securing the grant.

What a board in a Plus One county should do now

Tell your members, in writing, before anybody breaks ground. This is the entire recommendation and it costs a letter. A board in Bedford, Cortlandt, Yorktown, Brookhaven, Huntington, Islip, Southampton, Southold or any other participating municipality should assume its members will hear about the money from the county and will not hear about the declaration from anyone.

The letter should say three things plainly: that the community's governing documents restrict second dwelling units and separate rentals (if they do — check first); that a county or state permit or grant does not change that; and that an owner considering an ADU should speak to the board before applying, not after.

Then check what your declaration actually says. Older New York declarations frequently restrict “single-family use” or “one dwelling per lot” without contemplating an accessory unit at all, and some are ambiguous. That matters, because New York courts construe restrictive covenants strictly against the party enforcing them, resolve ambiguity to limit rather than extend the restriction, and adopt the less restrictive of two available readings. A board that assumes its documents forbid an ADU may be wrong.

And decide, deliberately, whether you want to forbid it. The state is offering members of your community up to six figures to build housing. A board whose answer is a flat no should have reached that position on purpose, with the members, rather than by default through an enforcement letter. Our New York ADUs and modifications page covers the framework, and our architectural review page covers the approval route if the answer is a qualified yes.

One honest limit on this reporting

We could not read the codified municipal chapters. The host that carries most New York municipal codes refused every request from this environment, so nothing in this article quotes a codified village or town ordinance. Adoption dates, subject matter, programme terms and the regulatory-agreement language above all come from the state, county and municipal pages we did open. A board relying on a specific local ADU standard — a size cap, a setback, an owner-occupancy requirement, a fee — should pull its own municipality's chapter rather than any summary.

Separately, a search-result summary reported a 2026 New York City ADU round reopening March 18 and closing June 12, 2026, with up to $395,000 available as a grant plus loan, and a state gap-financing solicitation of up to $3 million for programme lenders. We did not open those documents and are not reporting those figures as verified.