ADU · Columbia County
Can you build an ADU in Gallatin, NY?
Town of Gallatin has 4 districts. 3 districts allow ADUs with a special-use permit, 1 does not. Check your address to confirm the district that applies to your parcel:
What the Gallatin 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 |
|---|---|---|---|---|
| Hamlet | 1 ac | 50 / 25 / 50 ft | 35 ft | No |
| Residential Agricultural (2-Acre) | 2 ac | 75 / 50 / 100 ft | 35 ft | Special permit |
| Low Density Residential (3-Acre) | 3 ac | 75 / 50 / 100 ft | 35 ft | Special permit |
| Residential Agricultural (3-Acre) | 3 ac | 75 / 50 / 100 ft | 35 ft | Special permit |
Hamlet, Residential Agricultural (2-Acre), Low Density Residential (3-Acre), Residential Agricultural (3-Acre) — The schedule column is "Min Lot Area per DU or Establishment" — the figure is the land each dwelling unit or establishment requires, not a per-lot minimum. THE LOT MINIMUM IS MEASURED ON NET LAND. § 4.5.A.3 provides that wherever "lot area", "minimum lot area" or "minimum lot size" appears in this law it means net acreage after excluding the FEMA 100-year floodplain, State and Army Corps wetlands (though not the 100 ft wetland buffer), land covered by open water or perennial streams, and land of 25% slope or greater. A parcel that measures three acres on the deed may hold no conforming lot at all. The Planning Board may also fix building envelopes and require map notes, and disturbance of slopes over 20% must be avoided so far as practicable (§ 4.5.A.4). TWO SINGLE-FAMILY DWELLINGS MAY SHARE ONE LOT, without subdivision approval, provided the lot is at least TWICE the minimum area for one and each building independently meets the bulk regulations and could stand on a conforming subdivided lot (§ 4.2.B). This is two detached houses on one lot, not a two-family dwelling, and the vocabulary has no term for it, so no variant is recorded — the doubling is stated here instead. Minimum lot FRONTAGE is 250 ft in every district, a separate requirement from the lot width above. A minimum DRIVEWAY setback also applies — 10 ft in H and 15 ft elsewhere — and has no field. On a through lot the front-yard requirement must be met on BOTH streets (§ 4.3.B.1).
ADUs vs. short-term rentals in Gallatin
No local short-term-rental law on record - which is not the same as permission for Town of Gallatin. No local STR ordinance found as of Jun 2026. Columbia County occupancy tax applies. 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 minimum1–3 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNYSEG territory.
- Zoning codegallatinny.gov/wp-content/uploads/2015/11/Gallatin-Zoning-Law.pdf
- Building dept(518) 398-7571
- Last reviewed2026-08-16
ADU FAQ — Gallatin, NY
Are ADUs allowed in Gallatin, NY?
Town of Gallatin has 4 districts. 3 districts allow ADUs with a special-use permit, 1 does not. Check your address with the free ADU checker, or confirm with the building department at (518) 398-7571.
Do I need a special permit for an ADU in Gallatin?
It depends on the district: 3 of 4 require a special-use permit, the rest do not. Check the district that applies to your parcel before you design.
Can I use an ADU as a short-term rental in Gallatin?
No local short-term-rental law on record - which is not the same as permission for Town of Gallatin. 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 Gallatin
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $195k–260k 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 Gallatin, priced by size.
More on Gallatin: Full zoning for new construction · ADU build cost · House build cost · All Columbia County towns
ADU information for Town of Gallatin is compiled from the municipal code (last reviewed 2026-08-16) 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 (518) 398-7571 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.