Zoning, building permits and septic rules in the Village of Old Brookville, NY

At a glance

Zoning

Village of Old Brookville adopts its own Chapter 300 Zoning¹

Building permits

Required for Uniform Code work; apply to the village Building Department³²

Certificate of occupancy

Required for work that needed a building permit⁵

Subdivision

Regulated by the village code (Chapter 245)⁶

Septic

Nassau County Department of Health for subdivisions of 5 or more lots; otherwise ask the village Building Department⁴⁷

RV, tiny home, lot size

Not confirmed; ask the Building Department²

Who to call

Contact details are copied from each office’s official page and were checked against it on October 14, 2026.

Does Old Brookville, NY have zoning?

Yes. The Village of Old Brookville adopts its own zoning in Chapter 300 of the village code¹. The chapter establishes zoning districts, residence districts, business districts and a zoning map⁸. Zoning in Nassau County is set by cities, towns and villages, not by the county⁹, and New York counties have no authority to adopt zoning for unincorporated land¹⁰.

We could not confirm the village's rules on RV or trailer occupancy, tiny homes, accessory dwellings, minimum lot size, setbacks or building height, so ask the Building Department before you rely on any of them². Rules differ by district, so have the district for your parcel in hand when you call.

Do you need a building permit in Old Brookville, and who issues it?

Building permits are required in New York for work that must conform to the Uniform Code³, and a certificate of occupancy is required for work that needed a building permit⁵. Inside the Village of Old Brookville, the village Building Department is the office to ask².

We could not confirm the village's own fee schedule, exemptions or inspection steps, so ask the Building Department what your project needs.

How do septic permits work inside Old Brookville?

Nassau County's Department of Health reviews engineering plans for residential developments of 5 or more lots¹¹. For a single home that is not part of a new realty subdivision, or for a renovation, the county tells applicants to contact the local building department for septic system approval requirements⁴. For Old Brookville that means the village Building Department first².

Whether a particular lot is on public sewer or on a septic system is something we could not confirm for the village. Ask the Nassau County Department of Health, Bureau of Environmental Engineering, at 516-227-9692⁷.

Building a home in Old Brookville: the steps, in order

1. Call the village Building Department to confirm the zoning district and what your project needs².
2. Check whether the project is a subdivision, which the village code regulates in Chapter 245⁶.
3. Apply for a building permit through the Building Department².
4. Confirm septic or sewer requirements with the Building Department and the Nassau County Department of Health⁴.
5. Keep work accessible until inspected, then obtain a certificate of occupancy⁵.

What to check before you buy land in Old Brookville

Ask the Building Department which zoning district the parcel is in and what the village requires for a new house, since the district text decides lot size and setbacks⁸. Nassau County's effective property tax rate is 1.5%¹², and the county's median property tax bill is $10,001 a year¹³. Nassau County is densely developed, with about 4,856 people per square mile¹⁴. A parcel next to a county road may also need county Department of Public Works contact for road openings or curb cuts¹⁵. For land outside the village, see the Nassau County page.

Watch-outs

• The village's own rules on RVs, trailers, tiny homes, accessory dwellings, minimum lot size and setbacks are unconfirmed; ask the Building Department before buying or planning around them².
• Search results for Old Brookville building permits often show Town of Hempstead pages; the village is its own permit office, so use the village Building Department².
• Septic approval for a single home inside the village is routed through the local building department, not the county, unless the project is a subdivision of 5 or more lots⁴.

Sources

1. Village of Old Brookville, NY code table of contents (eCode360) (Village of Old Brookville), quoted and re-checked
2. Village of Old Brookville Building Department (oldbrookville.gov)
3. Part 1203 Uniform Code and the Energy Code: Minimum Standards for Administration and Enforcement (New York statewide rule), quoted and re-checked
4. On Site Sewage Disposal, quoted and re-checked
5. Part 1203 Uniform Code and the Energy Code: Minimum Standards for Administration and Enforcement (New York statewide rule), quoted and re-checked
6. Village of Old Brookville, NY code table of contents (eCode360) (Village of Old Brookville), quoted and re-checked
7. Nassau County Department of Health, Bureau of Environmental Engineering (nassaucountyny.gov)
8. Chapter 300 Zoning, Village of Old Brookville (eCode360) (Village of Old Brookville), quoted and re-checked
9. Zoning Review, quoted and re-checked
10. documents.dps.ny.gov (New York statewide rule), quoted and re-checked
11. On Site Sewage Disposal, quoted and re-checked
12. Effective property tax rate: Bolthole Index county data
13. Median property tax bill: Bolthole Index county data
14. Population density: Bolthole Index county data
15. Building and Zoning Permits, quoted and re-checked

Written October 14, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.