ADU · Monroe County
Can you build an ADU in Webster, NY?
Town of Webster has 6 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:
What the Webster 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 |
|---|---|---|---|---|
| R-1 Single-Family Residential District | 0.8035 ac | 75 / 20 / 60 ft | 30 ft | No |
| R-2 Single-Family Residential District | 0.6428 ac | 60 / 15 / 55 ft | 30 ft | No |
| R-3 Single-Family Residential District | 0.5051 ac | 50 / 15 / 50 ft | 30 ft | No |
| LL Large-Lot Single-Family Residential District | 3 ac | 75 / 15 / 60 ft | 30 ft | No |
| MHR Medium-High Residential District (single-family detached) | 0.2583 ac | 35 / 10 / 35 ft | 30 ft | No |
| LMR Low-Medium Residential District (single-family detached) | 0.3099 ac | 35 / 10 / 50 ft | 30 ft | No |
ADUs vs. short-term rentals in Webster
Short-term rentals prohibited for Town of Webster. Short-term rentals are BANNED. § 350-82A of Zoning Chapter 350, added 2010, applies to rentals of all and any dwellings including single-family, and states in terms that TRANSIENT RENTALS ARE SPECIFICALLY PROHIBITED. § 350-3 defines a TRANSIENT RENTAL as the rental of a dwelling unit for a period of less than 28 continuous days. Do not underwrite short-term rental income on a Town of Webster property; note the Village of Webster is a separate jurisdiction and also prohibits them. 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 Webster at (585) 872-7036 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 minimum0.2583–3 ac — an ADU still has to fit the district's lot and setback envelope.
- UtilityRG&E territory.
- Building dept(585) 872-7036
- Last reviewed2026-08-10
ADU FAQ — Webster, NY
Are ADUs allowed in Webster, NY?
Town of Webster has 6 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (585) 872-7036.
Do I need a special permit for an ADU in Webster?
No. No district in Town of Webster permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (585) 872-7036 before ruling it out.
Can I use an ADU as a short-term rental in Webster?
Short-term rentals prohibited for Town of Webster. 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 Webster
Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $200k–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 Webster, priced by size.
More on Webster: Full zoning for new construction · ADU build cost · House build cost · All Monroe County towns
ADU information for Town of Webster is compiled from the municipal code (last reviewed 2026-08-10) 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 (585) 872-7036 before relying on any answer. Source: Offsite / Aldo zoning dataset, municipalData.js.