ADU · Rockland County

Can you build an ADU in Wesley Hills, NY?

Village of Wesley Hills has 5 districts. All districts prohibit ADUs. Check your address to confirm the district that applies to your parcel:

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What the Wesley Hills code says

The Village of Wesley Hills has no accessory dwelling provision under any name, and § 230-16B deems any use not specifically listed as permitted to be prohibited. That holds in R-50, R-35, R-20, R-15 and NS alike.

Conditions the code attaches:

A lot may hold no more than one main building and its accessory buildings, except nonresidential buildings in districts where such uses are permitted (§ 230-14A), ruling out a backyard cottage.
The only dwelling the use schedule permits in any district is a one-family detached dwelling.
One roomer may be kept in a one-family detached dwelling as an accessory use, by right. It is not a separate dwelling unit, with no separate kitchen or certificate of occupancy.
Confirm with the Building Department at (845) 354-0400.

What the Wesley Hills 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
Residential R-50	1.15 ac	50 / 30 / 50 ft	25 ft	No
Residential R-35	0.8 ac	50 / 25 / 50 ft	25 ft	No
Residential R-20	0.46 ac	40 / 25 / 40 ft	25 ft	No
Residential R-15	0.34 ac	35 / 25 / 35 ft	25 ft	No
Neighborhood Shopping	0.92 ac	75 / 40 / 40 ft	35 ft	No

Residential R-50 - A minimum effective square of a hundred and fifty feet a side must also fit inside the lot, a shape test on top of area and width. Lot width may drop to a hundred feet where the lot fronts a cul-de-sac or a street whose centre line curves at a radius of a hundred feet or less.

Minimum lot frontage of 100 feet is a separate standard, and the Planning Board may reduce it for a lot on a cul-de-sac or a street curving at a radius of a hundred feet or less.
An average-density lot needs at least forty thousand square feet, at least a hundred and twenty-five feet of width and ninety of frontage, with twenty-five-foot side yards and sixty for the pair.
In an average-density subdivision of ten or more lots, a tenth of the lots may go down to thirty-five thousand square feet.
Building coverage is the footprint alone; the impervious surface ratio adds drives, terraces and every other hard surface, and a separate ratio caps front-yard impervious surface at 0.15 in R-50.
The height shown is the maximum building height; a larger maximum exposed building height of forty feet is allowed in the residential districts, measured where the ground falls away.
Not more than a quarter of land under water, in a hundred-year floodplain, in a utility or other easement or right-of-way, or with unexcavated slopes over 25% may count toward the minimum lot area.

Residential R-35 - A minimum effective square of a hundred and twenty-five feet a side must also fit inside the lot, a shape test on top of area and width. Lot width may drop to seventy-five feet on a cul-de-sac or tightly curved street.

Minimum lot frontage of 100 feet is a separate standard, and the Planning Board may reduce it for a lot on a cul-de-sac or a street curving at a radius of a hundred feet or less.
An average-density subdivision lot needs at least thirty thousand square feet and at least a hundred and ten feet of width.
In an average-density subdivision of ten or more lots, a tenth of the lots may go down to twenty-five thousand square feet.
Building coverage is the footprint alone; the impervious surface ratio adds drives, terraces and every other hard surface, and a separate ratio caps front-yard impervious surface at 0.20 in R-35.
The height shown is the maximum building height; a larger maximum exposed building height of forty feet is allowed in the residential districts, measured where the ground falls away.
Not more than a quarter of land under water, in a hundred-year floodplain, in a utility or other easement or right-of-way, or with unexcavated slopes over 25% may count toward the minimum lot area.

Residential R-20 - A minimum effective square of 90 ft a side must fit inside the lot, on top of the area and width. Where the lot carries pavement for a common driveway, the impervious ratio rises from 0.25 to 0.45.

Minimum lot frontage of 90 ft is a separate standard, and the Planning Board may reduce it for a lot on a cul-de-sac or a street curving at a radius of a hundred feet or less.
Building coverage is the footprint alone; the impervious surface ratio counts drives, terraces and every other hard surface with it.
A separate ratio caps impervious surface in the front yard alone, at 0.20 in this district.
The height shown is the maximum building height; a larger maximum exposed building height of 40 ft is allowed in the residential districts, measured where the ground falls away.
Not more than a quarter of land under water, in a hundred-year floodplain, in a utility or other easement or right-of-way, or with unexcavated slopes over 25% may count toward the minimum lot area.

Residential R-15 - A minimum effective square of 90 ft a side must fit inside the lot, which on a 62.5 ft width forces a deep parcel. The Planning Board may reduce the 62.5 ft frontage to 50 ft on a cul-de-sac or tightly curved street.

There is no storey limit here and no front-yard impervious ratio.
Where the lot carries pavement for a common driveway, the impervious ratio rises from 0.25 to 0.45.
Building coverage is the footprint alone; the impervious surface ratio counts drives, terraces and every other hard surface with it.
The height shown is the maximum building height; a larger maximum exposed building height of 40 ft is allowed in the residential districts, measured where the ground falls away.
Not more than a quarter of land under water, in a hundred-year floodplain, in a utility or other easement or right-of-way, or with unexcavated slopes over 25% may count toward the minimum lot area.

Neighborhood Shopping - A minimum effective square of 150 ft a side must fit inside the lot, a shape test on top of the area and width.

Minimum lot frontage of 150 ft is a separate standard, and the Planning Board may reduce it for a lot on a cul-de-sac or a street curving at a radius of a hundred feet or less.
Building coverage is the footprint alone; the 80% impervious surface ratio counts drives, terraces and every other hard surface with it.
Not more than a quarter of land under water, in a hundred-year floodplain, in a utility or other easement or right-of-way, or with unexcavated slopes over 25% may count toward the minimum lot area.

ADUs vs. short-term rentals in Wesley Hills

Short-term-rental status not confirmed for Village of Wesley Hills. Short-term rental rules in the Village of Wesley Hills are not confirmed. Confirm with the Building Department before listing a property. 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 minimum0.34–1.15 ac — an ADU still has to fit the district's lot and setback envelope.
UtilityOrange & Rockland territory.
Zoning codeecode360.com/27842469
Building dept(845) 354-0400

ADU FAQ — Wesley Hills, NY

Are ADUs allowed in Wesley Hills, NY?

Village of Wesley Hills has 5 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department at (845) 354-0400.

Do I need a special permit for an ADU in Wesley Hills?

No. No district in Village of Wesley Hills permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department at (845) 354-0400 before ruling it out.

Can I use an ADU as a short-term rental in Wesley Hills?

Short-term-rental status not confirmed for Village of Wesley Hills. 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.

Run the free ADU check for your parcel →

What an ADU costs to build in Wesley Hills

Permission is one question and budget is another. An 800 sq ft accessory unit here runs roughly $225k–295k 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 Wesley Hills, priced by size.

How we know this

Sections analyzed: § 230-16 (Schedule of Use Regulations) · § 230-14A · § 230-11 · § 230-6
Districts confirmed: 5 of 5 — every mapped district.
Last reviewed: 2026-07-21
Not covered here: Overlay districts, the zoning map, and any conditions attached to an individual parcel. Size limits and owner-occupancy terms sit in the code section above, not in this summary.

More on Wesley Hills: Full zoning for new construction · ADU build cost · House build cost · ADU rules across Rockland County · All Rockland County towns

ADU information for Village of Wesley Hills is compiled from the municipal code (last reviewed 2026-07-21) 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) 354-0400 before relying on any answer. Source: the Offsite / Aldo zoning dataset.