ADU · Westchester County
Can you build an ADU in Eastchester, NY?
Town of Eastchester has 19 districts. 17 of 19 districts prohibit ADUs. 2 districts have incomplete data - verify with the building department at (914) 771-3317. Check your address to confirm the district that applies to your parcel:
What the Eastchester 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 |
|---|---|---|---|---|
| One Family Residence | 0.2296 ac | — | 20 ft | No |
| One Family Residence | 0.3444 ac | — | 20 ft | No |
| One Family Residence | 0.4591 ac | — | 20 ft | No |
| One Family Residence | 0.1148 ac | — | 20 ft | No |
| One Family Residence | 0.1377 ac | — | 20 ft | No |
| One Family Residence | 0.1722 ac | — | 20 ft | No |
| Two Family Cluster Residence | 0.0689 ac | — | 20 ft | No |
| Multi Family Residence | — | — | — | No |
| Multi-Family Residence | 0.0344 ac | — | 25 ft | No |
| One Family Cluster Residence | 0.0344 ac | — | 25 ft | No |
| Multi-Family Residence | 0.008 ac | — | 65 ft | No |
| Multi-Family Residence | 0.0161 ac | — | 45 ft | No |
| Residential Transition | 0.0138 ac | — | 35 ft | No |
| Designed Shopping Center | — | — | 50 ft | No |
| General Business | — | — | 35 ft | No |
| Open Retail Business | — | — | 35 ft | No |
| Retail Business | — | — | 45 ft | No |
| Park | — | — | — | — |
| Unzoned | — | — | — | — |
ADUs vs. short-term rentals in Eastchester
No local short-term-rental law on record - which is not the same as permission for Town of Eastchester. No local short-term-rental law found as of 2026-08-26. The Town Zoning Law is a scanned document and was read by OCR end to end (222 pages); it contains no short-term-rental, transient-rental or rental-registration provision. IT DOES CLOSE THE OBVIOUS RESIDENTIAL ROUTE: the definition of HOME OCCUPATION expressly excludes 'tourist homes' from the uses that may be carried on as a secondary use of a dwelling, and the definition of HOME PROFESSIONAL OFFICE excludes them again — so operating transient lodging as an accessory to living there is not available. Transient lodging is otherwise contemplated only as a HOTEL, defined as a building of rooms without individual kitchens occupied by transient guests, which carries a five-acre minimum and 1,500 square feet of land per guest room. Absence of a found STR law is not permission. New York State's 2025 short-term rental registry (Ch. 99 of the Laws of 2025) separately requires every host statewide to register the unit regardless of local law. Confirm with Town of Eastchester at (914) 771-3317 before listing. 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 minimum0.008–0.4591 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityCon Edison territory.
- Building dept(914) 771-3317
- Last reviewed2026-06-08
ADU FAQ — Eastchester, NY
Are ADUs allowed in Eastchester, NY?
Town of Eastchester has 19 districts. 17 of 19 districts prohibit ADUs. 2 districts have incomplete data - verify with the building department at (914) 771-3317. Check your address with the free ADU checker.
Do I need a special permit for an ADU in Eastchester?
17 of 19 districts prohibit ADUs, so no permit applies in those. 2 districts have incomplete data - verify with the building department at (914) 771-3317.
Can I use an ADU as a short-term rental in Eastchester?
No local short-term-rental law on record - which is not the same as permission for Town of Eastchester. 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 Eastchester
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $235k–310k 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 Eastchester, priced by size.
More on Eastchester: Full zoning for new construction · ADU build cost · House build cost · All Westchester County towns
ADU information for Town of Eastchester is compiled from the municipal code (last reviewed 2026-06-08) 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 (914) 771-3317 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.