ADU · Greene County
Can you build an ADU in Athens, NY?
Town of Athens has 13 districts. 7 districts allow ADUs, 2 do not, 1 requires a special-use permit. 3 districts have incomplete data - verify with the building department at (518) 945-1052. Check your address to confirm the district that applies to your parcel:
What the Athens 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 |
|---|---|---|---|---|
| Rural Residential District | 1.5 ac | 25 / 40 / 25 ft | 35 ft | As of right |
| Rural District | 3 ac | 50 / 30 / 50 ft | 35 ft | As of right |
| Rural District (Moderate Density) | 1 ac | 25 / 30 / 50 ft | 35 ft | As of right |
| Hamlet District | 0.23 ac | 25 / 20 / 25 ft | 25 ft | As of right |
| Mixed Use Commercial District | 1 ac | 40 / 25 / 50 ft | 35 ft | Special permit |
| Light Industrial District 1 | 2 ac | 100 / 50 / 50 ft | 45 ft | No |
| Light Industrial District 2 | 2 ac | 100 / 50 / 50 ft | 45 ft | No |
| Agriculture District | 1 ac | 75 / 50 / 50 ft | 35 ft | As of right |
| Open Space District | 1 ac | 75 / 50 / 50 ft | 35 ft | As of right |
| Rural Residential / Route 385 Corridor | 3 ac | 75 / 50 / 50 ft | 35 ft | As of right |
| Hudson Lowlands Waterfront District | 5 ac | 75 / 50 / 50 ft | 35 ft | — |
| Greenport Lowlands Waterfront District | 5 ac | 75 / 50 / 50 ft | 35 ft | — |
| Backlands Waterfront District | 5 ac | 75 / 50 / 50 ft | 35 ft | — |
ADUs vs. short-term rentals in Athens
Short-term rentals allowed with local rules for Town of Athens. Town of Athens enacted Chapter 147 (Short-Term Residential Rentals) in 2017, requiring annual registration with the Town Clerk, code-compliance inspections, and a local contact for out-of-county owners; occupancy limited to 2 persons per unit plus 2 per bedroom. 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 minimum0.23–3 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCentral Hudson territory.
- Building dept(518) 945-1052
- Last reviewed2026-08-16
ADU FAQ — Athens, NY
Are ADUs allowed in Athens, NY?
Town of Athens has 13 districts. 7 districts allow ADUs, 2 do not, 1 requires a special-use permit. 3 districts have incomplete data - verify with the building department at (518) 945-1052. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Athens?
It depends on the district: 1 of 13 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 Athens?
Short-term rentals allowed with local rules for Town of Athens. 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 Athens
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 Athens, priced by size.
More on Athens: Full zoning for new construction · ADU build cost · House build cost · All Greene County towns
ADU information for Town of Athens 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) 945-1052 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.