ADU · Greene County
Can you build an ADU in Halcott, NY?
Town of Halcott has 1 district. The only district allows ADUs. Check your address to confirm the district that applies to your parcel:
What the Halcott code says
One accessory apartment is permitted by right on any lot that meets the district minimum acreage, either inside the principal building or in a separate accessory structure. There is no owner occupancy requirement, so the unit can be let.
Conditions the code attaches:
- The apartment may be no larger than 50% of the principal structure's square footage, excluding an unfinished basement (§ 4.4.4).
- One accessory apartment per lot (§ 4.4.4a(1)).
- No family or age restriction applies to who may occupy the unit.
- Septic and potable water must meet both New York State and New York City requirements. Halcott sits in the New York City watershed, so those standards drive a second unit here.
- The unit must meet the NYS Uniform Fire Prevention and Building Code.
- On a pre-existing lot below the district minimum acreage, the by-right route is not available. Questions can go to the building department at (845) 586-2074.
What the Halcott code indicates by district
The table below shows how each district treats ADUs, alongside the lot and setback standards that govern a second unit. District boundaries and conditions vary, so treat this as a starting point and confirm the district that applies to your parcel.
| District | Min lot | Setbacks F / S / R | Max height | ADU |
|---|---|---|---|---|
| Town-wide land use district | 5 ac | - / 25 / - ft | 35 ft | As of right |
Town-wide land use district - The side setback drops to 25 feet on a parcel of less than 5 acres. The number of homes a parcel yields is calculated on net acreage, after excluding steep slopes over 20%, open water, and wetlands with a 100 foot buffer.
- Once that development potential has been used through subdivision, no further subdivision is allowed, and a fraction greater than 0.5 rounds up.
- In a clustered or conservation subdivision the Planning Board may vary the lot size, setbacks and layout, and the code publishes no replacement figures.
- The board may require it where the parcel holds floodplain, steep slope over 20% on a quarter of the site, wetlands on a quarter, or active farmland, or where ten or more homes are proposed.
- Spires, silos, chimneys, water tanks and similar structures are exempt from the 35 foot height limit if they cover no more than 10% of the roof area, or 5% of the lot if free standing.
- A building housing horses, farm animals or fowl may stand within 50 feet of a property line where the adjacent land is owned or leased by the farm operation.
- The code publishes no cap on lot coverage.
ADUs vs. short-term rentals in Halcott
No local short-term-rental law on record - which is not the same as permission for Town of Halcott. No local short-term rental law is on the books in Halcott as of June 2026. That is not the same as permission, so confirm with the building department before counting on rental income. These are separate questions from whether you can build an ADU — a unit you're allowed to add isn't automatically one you're allowed to rent nightly, so check both.
Good to know
- Residential lot minimum5 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCentral Hudson territory.
- Zoning codehalcottcenter.com/wp-content/uploads/2012/02/toh_landusecode-may2017.pdf
- Building dept(845) 586-2074
ADU FAQ — Halcott, NY
Are ADUs allowed in Halcott, NY?
Town of Halcott has 1 district. The only district allows ADUs. Check your address with the free ADU checker, or confirm with the building department at (845) 586-2074.
Do I need a special permit for an ADU in Halcott?
No district in Town of Halcott requires a special-use permit for an ADU - 1 district allows ADUs. Site-plan review or a building permit may still apply.
Can I use an ADU as a short-term rental in Halcott?
No local short-term-rental law on record - which is not the same as permission for Town of Halcott. ADU occupancy and short-term-rental rules are separate: an ADU you can build isn't automatically one you can rent nightly. Confirm both before you count on STR income.
What an ADU costs to build in Halcott
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $195k–255k at a standard finish, and the per-square-foot rate comes in above a full house because the kitchen, bath, panel and heating plant cost the same either way. See the full cost to build an ADU in Halcott, priced by size.
How we know this
- Sections analyzed
- Town of Halcott Land Use Law (adopted May 2009, updated May 2017) Table 3.1 Land Use Schedule; § 4.4.4 Accessory apartments; § 4.4.3 Country Inn
- Districts confirmed
- 1 of 1 — every mapped district.
- Last reviewed
- Not covered here
- Overlay districts, the zoning map, and any conditions attached to an individual parcel. Size limits and owner-occupancy terms sit in the code section above, not in this summary.
More on Halcott: Full zoning for new construction · ADU build cost · House build cost · ADU rules across Greene County · All Greene County towns
ADU information for Town of Halcott is compiled from the municipal code (last reviewed 2026-10-05) and provided for decision-support only — not legal or architectural advice. ADU eligibility, size, owner-occupancy and permit conditions vary by district and often carry exceptions; verify with the building department at (845) 586-2074 before relying on any answer. Source: the Offsite / Aldo zoning dataset.