ADU · Saratoga County

Can you build an ADU in Ballston Spa, NY?

Village of Ballston Spa 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 Ballston Spa code says

An accessory dwelling unit has no route to approval in any Ballston Spa district. A second unit comes only as a principal use, such as a two-family dwelling, which is permitted by right in R-2 only.

Conditions the code attaches:

A multiple-family dwelling is permitted by right in R-2 and available by special permit in the CBD and C districts.
A dwelling apartment over a business office is permitted by right in R-2, CBD and C.
In R-2 the lot must be at least 15,000 sq ft plus 2,500 sq ft for each additional dwelling unit.
In R-1 only a one-family dwelling is available.
Confirm with the Village Building Inspector, who enforces the zoning chapter.

What the Ballston Spa 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 Residential	0.23 ac	25 / 12 / 25 ft	36 ft	No
R-2 Residential	0.34 ac	25 / 15 / 25 ft	40 ft	No
CBD Central Business	0.11 ac	0 / 0 / 0 ft	50 ft	No
C Commercial	0.11 ac	25 / 0 / 0 ft	30 ft	No
M/CEE Industrial and Cultural-Economic Enhancement	0.11 ac	0 / 0 / 0 ft	50 ft	No

R-1 Residential - At least 30% of the lot must be landscaped, a floor that is separate from the 20% building coverage cap. The figures shown answer only for a one-family dwelling: every special permit use in R-1 must meet the R-2 standards for that use.

Under those R-2 standards a church needs 30,000 sq ft and 100 ft of width, and a mobile home park 80,000 sq ft on 200 ft.
Height binds in both stories and feet, so a design under 36 ft but over 2 1/2 stories fails.
The building coverage cap is subject to the sanitary disposal and off-street parking regulations, which can pull it down.

R-2 Residential - The lot minimum grows with the number of units: 15,000 sq ft plus 2,500 sq ft for each additional dwelling unit, so a four-unit building needs 22,500 sq ft. At least 30% of the lot must be landscaped, separate from the building coverage cap.

A mobile home park or cemetery takes the largest lot in the village, 80,000 sq ft on 200 ft of width, with the height cut to 30 ft; coverage stays at 30% and the yards at 25/15/25.
The figures shown are for dwellings. A library, museum, boarding house or bed-and-breakfast needs 15,000 sq ft and may reach 45 ft.
Lot area for other uses, in sq ft: at least 30,000 for a church, funeral home or school (a school at 20% coverage), and at least 80,000 for a mobile home park or cemetery.
Height binds in both stories and feet, so a design must stay within each limit.
The building coverage cap is subject to the sanitary disposal and off-street parking regulations, which can pull it down.

CBD Central Business - The 100% building coverage cap is subject to the sanitary disposal and off-street parking regulations, which can pull it down. No landscape coverage is required here.

Height binds in both stories and feet, so a design must stay within each limit.

C Commercial - The 75% building coverage cap is subject to the sanitary disposal and off-street parking regulations, which can pull it down. Height binds in both stories and feet, so a design must stay within each limit.

M/CEE Industrial and Cultural-Economic Enhancement - There is no minimum lot width, so a parcel of any shape may be built on, up to the 50% building coverage cap. That cap is subject to the sanitary disposal and off-street parking regulations, which can pull it down.

No landscape coverage is required here.
Height binds in both stories and feet, so a design must stay within each limit.

ADUs vs. short-term rentals in Ballston Spa

No local short-term-rental law on record - which is not the same as permission for Village of Ballston Spa. The Village of Ballston Spa has no local short-term rental law, and that is not the same as permission. Confirm in writing with the Village before counting on short-stay income. 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 minimum0.23–0.34 ac — an ADU still has to fit the district's lot and setback envelope.
UtilityNational Grid territory.
Zoning codeecode360.com/9056692

ADU FAQ — Ballston Spa, NY

Are ADUs allowed in Ballston Spa, NY?

Village of Ballston Spa has 5 districts. All districts prohibit ADUs. Check your address with the free ADU checker, or confirm with the building department.

Do I need a special permit for an ADU in Ballston Spa?

No. No district in Village of Ballston Spa permits an ADU, so there is no permit to apply for. Codes change, so verify with the building department before ruling it out.

Can I use an ADU as a short-term rental in Ballston Spa?

No local short-term-rental law on record - which is not the same as permission for Village of Ballston Spa. 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.

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What an ADU costs to build in Ballston Spa

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 Ballston Spa, priced by size.

How we know this

Sections analyzed: Ch. 205 Schedule A district use and dimensional schedule; residential and apartment-over-office rows
Districts confirmed: 5 of 5 — every mapped district.
Last reviewed: 2026-08-01
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 Ballston Spa: Full zoning for new construction · ADU build cost · House build cost · ADU rules across Saratoga County · All Saratoga County towns

ADU information for Village of Ballston Spa is compiled from the municipal code (last reviewed 2026-08-01) 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 municipality before relying on any answer. Source: the Offsite / Aldo zoning dataset.