ADU · Putnam County
Can you build an ADU in Carmel, NY?
Town of Carmel has 12 districts. 10 districts prohibit ADUs, 2 allow them. Check your address to confirm the district that applies to your parcel:
What the Carmel 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 |
|---|---|---|---|---|
| Conservation (min lot width 200 ft, lot depth 200 ft; 2 1/2 stories. Accessory buildings set back 75 ft front, 35 ft side, 25 ft rear. Single-family dwellings here are a SPECIAL PERMIT use, not permitted by right) | 2.75 ac | 75 / 50 / 50 ft | 35 ft | No |
| Low Density Residential (min lot width 200 ft, lot depth 200 ft; 2 1/2 stories. Accessory buildings set back 75 ft front, 35 ft side, 25 ft rear. Accessory dwelling units and short-term rentals are both listed accessory uses here) | 2.75 ac | 75 / 50 / 50 ft | 35 ft | As of right |
| Medium Density Residential (min lot width 100 ft, lot depth 150 ft; 2 1/2 stories. Accessory buildings set back 40 ft front, 20 ft side, 20 ft rear. Accessory dwelling units and short-term rentals are both listed accessory uses here) | 0.92 ac | 40 / 25 / 40 ft | 35 ft | As of right |
| Senior/Multifamily Residential (min lot width 200 ft, lot depth 200 ft; 2 1/2 stories. Accessory buildings set back 75 ft front, 35 ft side, 25 ft rear) | 2.75 ac | 75 / 50 / 50 ft | 35 ft | No |
| Hospital Residential (min lot width 200 ft, lot depth 200 ft; 2 1/2 stories. Accessory buildings set back 75 ft front, 35 ft side, 25 ft rear) | 2.75 ac | 75 / 50 / 50 ft | 35 ft | No |
| Manufactured Home Park (min lot width 200 ft, lot depth 200 ft; 2 1/2 stories. NOTHING is permitted by right in this district — manufactured housing itself is a special permit use under § 156-36.19) | 2.75 ac | 75 / 50 / 50 ft | 35 ft | No |
| Hamlet Mixed Use Center (min lot width 75 ft, lot depth 80 ft; 3 stories, which the Planning Board may raise to 3 1/2 stories and 40 ft where the design conceals at-grade parking and screens utilities within the upper story. NO front setback is required as a baseline, though the Planning Board may require one; the side yard is 10 ft, or zero for an attached building. Short-term rentals are a listed accessory use here) | 0.23 ac | 0 / 10 / 25 ft | 35 ft | No |
| Neighborhood Business (min lot width 75 ft, lot depth 80 ft; 3 stories, which the Planning Board may raise to 3 1/2 stories and 40 ft on the same conditions as HMC. Accessory buildings set back 25 ft front, 10 ft side, 10 ft rear) | 0.23 ac | 25 / 15 / 25 ft | 35 ft | No |
| Corridor Business (min lot width 150 ft, lot depth 100 ft; 2 1/2 stories. Accessory buildings set back 40 ft front, 20 ft side, 20 ft rear) | 0.92 ac | 40 / 25 / 40 ft | 35 ft | No |
| Town Commercial (min lot width 150 ft, lot depth 100 ft; 2 1/2 stories. Accessory buildings set back 40 ft front, 20 ft side, 20 ft rear) | 0.92 ac | 40 / 25 / 40 ft | 35 ft | No |
| Planned Recreation Destination (min lot width 200 ft, lot depth 200 ft; 2 1/2 stories. Note the name — this is a recreation/hospitality district built around bars, restaurants, hotels and craft beverage establishments, NOT a planned residential development) | 2.75 ac | 75 / 50 / 50 ft | 35 ft | No |
| Business Park (min lot width 200 ft, lot depth 200 ft; 4 stories — the tallest district in town. Accessory buildings set back 50 ft front, 25 ft side, 25 ft rear) | 2.75 ac | 50 / 40 / 40 ft | 50 ft | No |
ADUs vs. short-term rentals in Carmel
Short-term rentals allowed with local rules for Town of Carmel. Short-term rental is a defined and regulated use in the Town of Carmel. Under § 156-36.4 an STR REQUIRES a special use permit AND site plan approval from the Planning Board. Standards: not more than four bedrooms may be used for rental, no more than two people per bedroom, every rented bedroom must meet the NYS Building and Fire Code with compliant smoke alarms, and a floor plan identifying the guest bedrooms must be filed with the application. Short-term rental appears as a listed accessory use in the LDR, MDR and HMC districts only. Separately, since 2025 New York State requires every short-term-rental host to register the unit with the State through the county registry, regardless of what the municipality allows. 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 minimum0.23–2.75 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityNYSEG territory.
- Building dept(845) 628-1500
- Last reviewed2026-07-22
ADU FAQ — Carmel, NY
Are ADUs allowed in Carmel, NY?
Town of Carmel has 12 districts. 10 districts prohibit ADUs, 2 allow them. Check your address with the free ADU checker, or confirm with the building department at (845) 628-1500.
Do I need a special permit for an ADU in Carmel?
No district in Town of Carmel requires a special-use permit for an ADU - 10 districts prohibit ADUs, 2 allow them. Site-plan review or a building permit may still apply.
Can I use an ADU as a short-term rental in Carmel?
Short-term rentals allowed with local rules for Town of Carmel. 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 Carmel
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $215k–285k 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 Carmel, priced by size.
More on Carmel: Full zoning for new construction · ADU build cost · House build cost · All Putnam County towns
ADU information for Town of Carmel is compiled from the municipal code (last reviewed 2026-07-22) 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) 628-1500 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.