Bolthole Index

Nassau County, New York

Building permits, zoning and septic rules in Nassau County, New York

27Index Score / 100
#57 of 62 in New York

In Nassau County, New York, building permits are issued by the city, town or village that governs the parcel, not by a single county office.12 Zoning is also set locally, with the Nassau County Planning Commission reviewing referred zoning actions and county subdivision approval covering unincorporated areas.34 Septic and sewage approvals stay with the Nassau County Department of Health, which has jurisdiction over septic systems for developments of 5 lots or more; for a single home, ask the local building department how to proceed.5

At a glance

Building permit
Required for work subject to the Uniform Code; apply through the city, town or village with jurisdiction12
Zoning
Set and administered locally; Nassau County reviews certain zoning referrals3
Septic approval
County Health handles onsite sewage and developments of 5 or more lots; ask the local building department about individual-home approvals67
Certificate of occupancy
Required for permitted work and a change in general occupancy classification8
County subdivision review
Applies in unincorporated areas and to subdivisions within 300 feet of a municipal boundary49
County sewer permit fee
$120 permit fee plus a $399 inspection fee10
Groundwater-protection density
Covered individual-system development is limited to 1 dwelling per 40,000 square feet11

Who to call

Building permits

Town of Hempstead Department of Buildings

Building, plumbing, electrical and housing code administration and enforcement for property under Town of Hempstead jurisdiction; residents can submit permits and request inspections through the online portal

(516) 538-8500

tohbuildingquestions@hempsteadny.gov

One Washington Street, 2nd Floor, Hempstead, NY 11550

Online permits →

Septic permits

Nassau County Department of Health, Bureau of Environmental Engineering

Reviews and approves on-site sewage disposal system plans, issues SPDES permits before discharge, requires abandonment of septic systems where public sewer is available, and reviews realty-subdivision engineering plans for 5 or more lots

516-227-9692

Also useful

Nassau County Department of Health (Special Groundwater Protection Area rules)

Administers Article X of the Nassau County Public Health Ordinance, which limits residential density and non-residential sewage discharge and bars industrial wastewater discharge in the county's Special Groundwater Protection Areas

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

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Do you need a building permit in Nassau County, New York?

Yes. The New York State Uniform Code sets minimum construction standards throughout Nassau County, and building permits are required for work that must conform to that code, subject to permitted exceptions121. The city, town or village with jurisdiction administers the permit, so there is no single application office for every Nassau County parcel2. Permit holders must leave required work accessible and exposed until the municipality inspects and accepts it13. Permitted work requires a certificate of occupancy or compliance, as does a change in a building's general occupancy classification14.

Who issues building permits in Nassau County?

Building permits in Nassau County come from the city, town or village that governs the parcel; if the municipality is absent from the county's online list, call that municipality directly2. For property under Town of Hempstead jurisdiction, contact the Town of Hempstead Department of Buildings at One Washington Street, 2nd Floor, Hempstead, NY 11550, call (516) 538-8500 or email tohbuildingquestions@hempsteadny.gov15. The Hempstead office administers and enforces building, plumbing, electrical and housing codes15. Hempstead residents can submit applications, track them, request inspections and print permits through the town portal16. For construction on a county-owned road, contact both the municipality and Nassau County Department of Public Works2.

Does Nassau County, New York have zoning?

Zoning is a local power: cities, towns and villages make the zoning decisions that control individual parcels in Nassau County, while the Nassau County Planning Commission reviews specified zoning actions referred by those local governments3. Zoning districts regulate land use, building bulk and development intensity, so a parcel's municipality and district determine the practical answer on use and dimensions17. The Town of Hempstead publishes its Building Zone Ordinance online for land under town jurisdiction18. We could not confirm one countywide minimum lot size, setback, lot-coverage limit, building-height limit or minimum dwelling size. Ask the city, town or village zoning office for the current district map and schedule before relying on a listing description.

How do septic permits work in Nassau County?

Nassau County Health administers onsite sewage disposal and requires a county SPDES permit before sanitary waste is discharged into the ground after approved construction619. County Health reviews water-supply, sewage-disposal and drainage plans for residential realty subdivisions of 5 or more lots before construction; individual homes outside a new subdivision and existing-home renovations should ask the local building department about septic approval requirements7. Commercial onsite systems designed for 1,000 gallons per day or more need county plan approval before construction or modification20. Covered development in a Special Groundwater Protection Area is limited to 1 dwelling per 40,000 square feet for qualifying individual-system projects, and industrial wastewater discharge is prohibited there1121. Only 11.5% of county soils are rated without severe limitations for a conventional drain field22.

Can you live in an RV or tiny home in Nassau County?

We could not confirm one countywide rule allowing long-term RV occupancy, temporary camping or tiny-home occupancy. Because zoning actions and districts are local, ask the parcel's city, town or village whether the proposed unit is treated as a dwelling, manufactured home, recreational vehicle or accessory structure and which use and dimensional rules apply317. A tiny home or manufactured home also needs a local building permit when its construction is subject to the state Uniform Code23. New York provides a narrow installer path for a person who will own and occupy a manufactured home, but the certified-installer requirement does not establish a general owner-builder exemption24.

Building a home in Nassau County: the steps, in order

  1. Identify the city, town or village with jurisdiction because that local government supplies building-permit information and controls parcel-level zoning23.
  1. Ask for the parcel's zoning district, allowed use and dimensional schedule17.
  1. Confirm whether the project uses public sewer or an onsite system; ask the local building department about an individual home's approval path and Nassau County Health about onsite disposal and qualifying realty subdivisions2526.
  1. Check whether subdivision review applies: Nassau County approves subdivisions in unincorporated areas and reviews subdivision applications within 300 feet of a municipal boundary279.
  1. Submit the local building-permit application and arrange each required inspection113.
  1. Coordinate with Nassau County Public Works if construction affects a county-owned road2.
  1. Obtain the required certificate of occupancy or compliance before using permitted work8.

What should you check before buying land in Nassau County?

Confirm municipal jurisdiction, zoning district, legal access, flood exposure, water service and sewage disposal before closing. Nassau County subdivision jurisdiction covers the unincorporated portions of Hempstead, North Hempstead and Oyster Bay, and county review also reaches proposed subdivisions within 300 feet of a municipal boundary2829. The published initial subdivision-plan review fee is $7,000 plus $300 per lot, so subdivision feasibility should be priced early30. Conventional septic suitability also deserves early study because only 11.5% of county soils are rated without severe limitations for a conventional drain field22. Typical home value is about $859,544 and the median property-tax bill is about $10,001 per year3132.

Watch-outs

  • The Hempstead contact listed here applies only where the Town of Hempstead has jurisdiction; use the parcel's city, town or village office elsewhere in Nassau County2.
  • A subdivision within 300 feet of a municipal boundary receives Nassau County Planning Commission review even when the property is not in an unincorporated area33.
  • We could not confirm countywide rules for RV occupancy, tiny homes, minimum dwelling size or setbacks; zoning varies locally, so ask the parcel's city, town or village zoning office3.
  • Local building permits do not cover septic: Nassau County Department of Health handles onsite sewage approvals even where a town or village issues the building permit.56

Sources

  1. Division of Building Standards and Codes Frequently Asked Questions, quoted and re-checked
  2. Building and Zoning Permits, quoted and re-checked
  3. Zoning Review, quoted and re-checked
  4. Planning Commission, quoted and re-checked
  5. On Site Sewage Disposal, quoted and re-checked
  6. On-Site Sewage Disposal System and SPDES Permit, quoted and re-checked
  7. On Site Sewage Disposal | Nassau County, NY, quoted and re-checked
  8. Division of Building Standards and Codes Frequently Asked Questions, quoted and re-checked
  9. Environmental Review, quoted and re-checked
  10. Permits & Fees, quoted and re-checked
  11. Nassau County Public Health Ordinance Article X: Groundwater Protection; Regulation of Sewage and Industrial Wastewater, quoted and re-checked
  12. Legal Memorandum LG03: NYS Uniform Fire Prevention and Building Code: What Elected and Other Government Officials Need to Know, quoted and re-checked
  13. Legal Memorandum LG03: NYS Uniform Fire Prevention and Building Code: What Elected and Other Government Officials Need to Know, quoted and re-checked
  14. Legal Memorandum LG03: NYS Uniform Fire Prevention and Building Code: What Elected and Other Government Officials Need to Know, quoted and re-checked
  15. Town of Hempstead Department of Buildings (hempsteadny.gov)
  16. Online Permit Center, quoted and re-checked
  17. Zoning Review, quoted and re-checked
  18. Building Zone Ordinance, quoted and re-checked
  19. On-Site Sewage Disposal System and SPDES Permit, quoted and re-checked
  20. On-Site Sewage Disposal System and SPDES Permit, quoted and re-checked
  21. Nassau County Public Health Ordinance Article X: Groundwater Protection; Regulation of Sewage and Industrial Wastewater, quoted and re-checked
  22. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  23. Legal Memorandum LG03: NYS Uniform Fire Prevention and Building Code: What Elected and Other Government Officials Need to Know, quoted and re-checked
  24. dos.ny.gov, quoted and re-checked
  25. On Site Sewage Disposal, quoted and re-checked
  26. On Site Sewage Disposal, quoted and re-checked
  27. Planning Commission, quoted and re-checked
  28. Planning Commission, quoted and re-checked
  29. Environmental Review, quoted and re-checked
  30. Permits & Fees, quoted and re-checked
  31. Typical home value (Zillow): Bolthole Index county data
  32. Median property tax bill: Bolthole Index county data
  33. Environmental Review, quoted and re-checked

Written October 9, 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.

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Compared with neighboring counties

Like all 6 of its neighbors, Nassau County requires a building permit for a home.

RuleNassau CountyQueens CountyBronx CountyNew York CountyKings CountyWestchester CountyRichmond County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Dept. of HealthNot publishedNYC Dept. of Env. ProtectionNYC Dept. of Env. ProtectionNYC Dept. of Env. ProtectionCounty Dept. of HealthNYS Dept. of Health

County locator

Nassau County in New York

27
County map
Nassau County highlighted among the New York counties · colored by Index score

How Nassau County scores

Seclusion8100% ev.
Self-Sufficiency5094% ev.
Admin Boringness4490% ev.
Durability85100% ev.
Property Autonomy33100% ev.
Carry Cost14100% ev.

Evidence strength: 97%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$860kTypical home
1.5%Property tax
$62,463Land / acre
45.6"Annual rain
3.5% of yrsSevere drought
1.3 / yr (+1.2)Mid-century 100°F days
13.8 daysMid-century dry spell
2.85" (+8%)Mid-century 1-day rain
1.33×Wildfire change factor
100%Forward climate coverage
$2,634Home insurance / yr
0.6% / yrInsurance growth
0.38%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
3,161,571People within 30 min
22,147,798People within 2 hr
3,291,106Radius comparison (15 mi)
4,855.9People / sq mi
1.9%Federal land
95.5%Land at 15% slope or less
11.5%Soils rated "not limited" for septic (strict USDA rating)
8,135 acWorkable land screen
23.7 tonsBiomass / forest ac
54.1°FAvg temp

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Cities and towns in Nassau County

Inside a city, town or township here, that government usually sets zoning and may issue its own building permits; the county’s rules above cover land outside them.

Not yet researched: Village of Bayville · Village of Brookville · Village of Cove Neck · Village of East Hills · Village of East Williston · Village of Flower Hill · Glen Cove · Village of Great Neck Plaza · Town of Hempstead · Village of Hempstead · Village of Island Park · Village of Lattingtown · Village of Lawrence · Long Beach · Village of Lynbrook · Village of Massapequa Park · Village of Mineola · Village of Muttontown · Village of New Hyde Park · Town of North Hempstead · Town of Oyster Bay · Village of Oyster Bay Cove · Village of Plandome · Village of Port Washington North · Village of Rockville Centre · Village of Roslyn Harbor · Village of Sands Point · Village of South Floral Park · Village of Stewart Manor · Village of Williston Park

Answers from the rulebook for Nassau County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Nassau County rules

  • Local zoningVaries (with conditions)

    The aggregate zoning system across Nassau County's cities, towns, villages, and unincorporated areas; the countywide conclusion aggregates independently administered local zoning systems.

    • Zoning rules vary by municipality and district.
    • The Nassau County Planning Commission reviews zoning actions referred by local governments and generally makes recommendations to the referring body.
    • For unincorporated portions of the Towns of Hempstead, North Hempstead, and Oyster Bay, Nassau County has jurisdiction over subdivision review; this does not establish a single countywide zoning ordinance.
    • The Town of Hempstead Building Zone Ordinance contains local zoning requirements; its listed 2007 amendments became effective September 1, 2007, and applications without a permit and substantial construction by that date are subject to the new regulations.
    “any city, town, or village located in Nassau County must, before taking final action on specific proposed zoning changes [...] refer the proposed change”
    One more reviewed finding on this topic
    • Varies (with conditions) — Aggregate local zoning across Nassau County municipalities.
      “As mentioned above, any city, town, or village located in Nassau County must, before taking final action on specific proposed zoning changes (explained below), refer the proposed change to the Planning Commission for review. The Commission reviews non-residential projects and substantial residential subdivisions. The Planning Commission then makes a recommendation to the referring body on how to proceed.”
  • Zoning districtsPartial

    Publication and referral of local zoning districts and zoning actions in Nassau County

    • The county source defines zoning districts and describes county referral review, but local zoning maps and ordinances remain municipal.
    • The Planning Commission reviews referred actions and makes recommendations rather than administering every local zoning district.
    “Zoning can be defined generally as the division of a municipality’s land into districts, and the establishment of regulations controlling the use, bulk and intensity of what may be placed on the land within each district.”
  • Who permits septicCounty (with conditions)

    On-site sewage disposal systems and sanitary-waste discharges in Nassau County, including commercial facilities with an on-site system having a design flow of 1,000 gallons per day or more.

    • Engineering plans submitted to the Nassau County Department of Health must be designed by a New York State licensed Professional Engineer.
    • An Owner’s Letter, Consultant’s Letter, SQRA Form, and payment of plan-review fees are required as part of the application package.
    • Department approval is required before construction or modification of an on-site sewage disposal system for a commercial facility with a design flow of 1,000 gallons per day or more, as determined by the Department.
    • After satisfactory completion of approved construction, a SPDES permit must be obtained from the Nassau County Department of Health before sanitary waste is discharged into the ground.

    commercial on-site system design flow threshold: >= 1000 gallons per day (The page states this threshold for commercial facilities.)

    “The plans must be approved by this Department prior to the construction or modification of an on-site sewage disposal system for any commercial facility with a design flow of 1,000 gallons per day or more, as determined by the Department. [...] Upon satisfactory completion of approved construction, a State Pollutant Discharge Elimination System (SPDES) permit must be obtained from this Department prior to the discharge of sanitary waste into the ground.”
    5 more reviewed findings on this topic
    • County (with conditions) — New residential subdivisions, residential developments, and non-residential developments located wholly or partially within Nassau County Special Groundwater Protection Areas and using individual sewerage systems.
      “Individual sewerage systems may be approved as the method of sewage disposal for new single family residential subdivisions and new single family residential developments located wholly or partially within a Special Groundwater Protection Area provided the following conditions are met: a. the number of dwelling units may not exceed one (1) per 40,000 square feet of net area, and b. the subdivision or development, or any portion thereof, is not located within the service area of an existing public sewer system, and c. the subdivision or development is located in an area where subsoil and/or groundwater conditions are conducive to the proper functioning of individual sewerage systems, as determined by the approving authority.”
    • County — Industrial wastewater discharges within Nassau County Special Groundwater Protection Areas.
      “Finally, the discharge within these special areas of any industrial wastewater, whether or not it has received treatment, is prohibited.”
    • County (with conditions) — Nassau County Department of Health administration of onsite sewage disposal and related development review.
      “The Nassau County Department of Health has delegated authority from the State Department of Health and the Department of Environmental Conservation to approve plans for the water supply, sewage disposal and drainage aspects of these developments before construction may begin.”
    • County — On-site sewage disposal systems and SPDES permits administered by the Nassau County Department of Health Bureau of Environmental Engineering.
      “The plans must be approved by this Department prior to the construction or modification of an on-site sewage disposal system for any commercial facility with a design flow of 1,000 gallons per day or more, as determined by the Department.”
    • Mixed (with conditions) — On-site sewage disposal systems and related plan approvals in Nassau County
      “The Health Department has jurisdiction over septic systems for developments (realty subdivisions) of 5 lots or more. If your home is not part of a new realty subdivision or if you are renovating your existing home, you should contact your local building department for any septic system approval requirements.”
  • Septic permitRequired

    Commercial facilities and sanitary discharges to ground in non-sewered areas

    • For commercial facilities with design flow of 1,000 gallons per day or more, county plan approval is required before construction or modification.
    • After satisfactory completion of approved construction, a SPDES permit must be obtained before discharge of sanitary waste into the ground.
    • Commercial establishments may also need a Bureau of Environmental Sanitation food-protection permit.

    design flow threshold: >= 1000 gallons per day (commercial facility plan-approval threshold)

    “The plans must be approved by this Department prior to the construction or modification of an on-site sewage disposal system for any commercial facility with a design flow of 1,000 gallons per day or more, as determined by the Department. [...] Upon satisfactory completion of approved construction, a State Pollutant Discharge Elimination System (SPDES) permit must be obtained from this Department prior to the discharge of sanitary waste into the ground.”
    One more reviewed finding on this topic
    • Required — Discharge of sanitary waste into the ground from an on-site sewage disposal system.
      “Upon satisfactory completion of approved construction, a State Pollutant Discharge Elimination System (SPDES) permit must be obtained from this Department prior to the discharge of sanitary waste into the ground.”
  • Subdividing landRegulated (with conditions)

    Residential realty subdivisions of five or more lots in Nassau County, including developments requiring approval of water-supply, sewage-disposal, or drainage plans.

    • A realty subdivision is a development of 5 or more lots being developed for residential purposes.
    • The Nassau County Department of Health has delegated authority from the State Department of Health and the Department of Environmental Conservation to approve plans for the water supply, sewage disposal, and drainage aspects before construction may begin.
    • The Health Department has jurisdiction over septic systems for developments of 5 lots or more.
    • If a home is not part of a new realty subdivision, or if an existing home is being renovated, the applicant should contact the local building department for septic-system approval requirements.
    • The County's published initial subdivision-plan-review fee is $7,000 plus $300 per lot; resubmission review is $700.

    minimum residential lots for realty subdivision: >= 5 lots (The Health Department states that non-realty-subdivision homes and existing-home renovations should be handled through the local building department for septic approval requirements.) · initial subdivision plan review fee: 7000 USD (Additional $300 per lot.) · additional initial subdivision plan review fee: 300 USD per lot · subdivision plan review resubmission fee: 700 USD

    “A realty subdivision is a development of 5 or more lots that are being developed for residential purposes. The Nassau County Department of Health has delegated authority from the State Department of Health and the Department of Environmental Conservation to approve plans for the water supply, sewage disposal and drainage aspects of these developments before construction may begin.”
    11 more reviewed findings on this topic
    • Regulated (with conditions) — Residential realty subdivisions of five or more lots.
      “A realty subdivision is a development of 5 or more lots that are being developed for residential purposes. The Nassau County Department of Health has delegated authority from the State Department of Health and the Department of Environmental Conservation to approve plans for the water supply, sewage disposal and drainage aspects of these developments before construction may begin.”
    • Regulated (with conditions) — Subdivision of land in unincorporated portions of the Towns of Hempstead, North Hempstead, and Oyster Bay.
      “Nassau County has jurisdiction over the subdivision of land within the unincorporated portions of the Towns of Hempstead, North Hempstead and Oyster Bay.”
    • Regulated (with conditions) — Subdivision of land within Nassau County's unincorporated areas.
      “The Nassau County Planning Commission is mandated by law to approve subdivision of land within the unincorporated areas of the County and offer recommendations to municipalities on zoning referrals. The Planning Department staff processes and reviews subdivision applications and zoning referrals, and makes recommendations to the Planning Commission.”
    • Regulated (with conditions) — Subdivision properties located within an incorporated city or village and subdivisions on property within 300 feet of a municipal boundary in Nassau County.
      “The Planning Commission reviews all subdivision applications in the County's unincorporated areas and all applications for subdivisions on properties that fall within 300 feet of a municipal boundary.”
    • Regulated (with conditions) — Subdivision of land in the unincorporated portions of the Towns of Hempstead, North Hempstead, and Oyster Bay.
      “Nassau County has jurisdiction over the subdivision of land within the unincorporated portions of the Towns of Hempstead, North Hempstead and Oyster Bay.”
    • Regulated (with conditions) — Subdivision applications for properties in the County's unincorporated areas and properties within 300 feet of a municipal boundary.
      “The Planning Commission reviews all subdivision applications in the County's unincorporated areas and all applications for subdivisions on properties that fall within 300 feet of a municipal boundary.”
    • Regulated (with conditions) — Residential realty subdivisions of five or more lots in Nassau County, for the water supply, sewage disposal, and drainage aspects of the development.
      “A realty subdivision is a development of 5 or more lots that are being developed for residential purposes. The Nassau County Department of Health has delegated authority from the State Department of Health and the Department of Environmental Conservation to approve plans for the water supply, sewage disposal and drainage aspects of these developments before construction may begin.”
    • Regulated (with conditions) — Subdivision applications for properties in Nassau County that fall within 300 feet of a municipal boundary, including the county Planning Commission's review jurisdiction.
      “The Planning Commission reviews all subdivision applications in the County's unincorporated areas and all applications for subdivisions on properties that fall within 300 feet of a municipal boundary.”
    • Regulated (with conditions) — Subdivision of land within Nassau County unincorporated areas
      “The Nassau County Planning Commission is mandated by law to approve subdivision of land within the unincorporated areas of the County and offer recommendations to municipalities on zoning referrals.”
    • Regulated (with conditions) — Subdivision of land within unincorporated areas of Nassau County.
      “The Nassau County Planning Commission is mandated by law to approve subdivision of land within the unincorporated areas of the County”
    • Regulated (with conditions) — Subdivision of land within the unincorporated areas of Nassau County, including the unincorporated portions of the Towns of Hempstead, North Hempstead, and Oyster Bay.
      “The Nassau County Planning Commission is mandated by law to approve subdivision of land within the unincorporated areas of the County and offer recommendations to municipalities on zoning referrals.”
  • Driveway accessLimited

    Driveway curb cuts or road openings affecting Nassau County roads

    • County DPW must be contacted for road openings and curb cuts involving county roads.
    • Municipal requirements may also apply.
    • This claim does not establish a permit requirement for every private driveway.
    “When considering construction on Nassau County-owned roads, it is essential to contact both the municipality within which the property lies and the Nassau County Department of Public Works (DPW).”
  • Permit feesPublished

    Nassau County Department of Public Works permits and subdivision-plan review

    • Fees are for the listed county permit types and do not establish municipal building-permit fees.
    • Additional fees or deposits may apply where stated.

    subdivision plan review initial: 7000 USD (additional $300 per lot) · subdivision plan review resubmission: 700 USD · sewer permit: 120 USD · sewer permit inspection: 399 USD · residential road opening permit: 735 USD (fee includes deposit) · commercial road opening permit: 1470 USD (fee includes deposit)

    “Subdivision Plan Review (Initial review; additional $300 per lot) | $7,000.00 + $300.00 per lot”
    One more reviewed finding on this topic
    • Published — Nassau County Department of Public Works permits and reviews.
      “Sewer Permit | $120.00 Sewer Permit Inspection | $399.00 [...] Subdivision Plan Review (Initial review; additional $300 per lot) | $7,000.00 + $300.00 per lot”
  • Permit processPartial

    County and municipal permit processes identified on Nassau County’s building and zoning permit page.

    • Local building permits are provided by the applicable city, town, or village.
    • For construction on county-owned roads, the municipality and Nassau County Department of Public Works should both be contacted.
    • The page identifies sewer use, road opening, curb-cut, wastewater hauling, water permits, and county-road building permit coordination as county-related matters.
    “When considering construction on Nassau County-owned roads, it is essential to contact both the municipality within which the property lies and the Nassau County Department of Public Works (DPW). [...] The below cities, towns, and villages offer local building permit information online.”
  • County-wide zoningPresent

    Zoning in Nassau County is administered at the town/village level (there is no county-wide zoning); e.g., the Town of Hempstead Building Zone Ordinance.

    Town of Hempstead - Building Zone Ordinance ↗Scouted from the county site, not yet independently re-checked

New York rules that apply here

  • Building permitRequired

    Work that must conform to the New York State Uniform Code or Energy Code throughout New York State except New York City, where the city has its own construction code; local authorities having jurisdiction administer and enforce the state requirements within their boundaries.

    • A local authority having jurisdiction may expressly exempt one or more listed categories of work from the building-permit requirement.
    • Permitted exemption categories include one-story detached tool or storage sheds, playhouses, or similar structures associated with one- or two-family dwellings or townhouses not exceeding 144 square feet gross floor area; temporary sets and scenery; certain window awnings; partitions or movable cases less than 5 feet 9 inches high; painting, wallpapering, tiling, carpeting, or similar finish work; listed portable equipment or appliances; certain equipment replacements; and repairs that do not affect fire and life safety.
    • A permit exemption does not authorize work violating the Uniform Code or Energy Code.
    • Beginning December 31, 2025, regulated parties submitting building permit applications must comply with the 2025 NYS Uniform Code, subject to the stated transition option before that date.

    maximum gross floor area for listed detached accessory structures: <= 144 square feet (Only for one-story detached structures associated with one- or two-family dwellings or townhouses and used for tool/storage sheds, playhouses, or similar uses.) · height threshold for listed partitions or movable cases: < 5 feet 9 inches

    “Each authority having jurisdiction shall include in its code enforcement program provisions requiring building permits to be required for work that must conform to either or both of the Codes.”
    3 more reviewed findings on this topic
  • Owner-builder exemptionConditional

    Owner-performed home-improvement work at an owner’s primary residence in New York, as to a New York State home-improvement-contractor license.

    • New York State does not license home-improvement contractors.
    • A county or local municipality may license home-improvement contractors or particular home-improvement trades.
    • The Department of State identifies New York City; Suffolk, Nassau, Westchester, Putnam, and Rockland Counties; and the City of Buffalo as examples of local jurisdictions requiring a home-improvement-contractor license.
    • This finding concerns home-improvement-contractor licensing only; it does not establish an exemption from locally administered building permits, inspections, or licenses for particular trades.
    “Check your local government licensing requirements: New York State does not license home improvement contractors. However, some counties and local municipalities do, including New York City, Suffolk, Nassau, Westchester, Putnam, and Rockland counties, and the City of Buffalo.”
    One more reviewed finding on this topic
    • Available (with conditions) — An owner intending to own and occupy a manufactured home may apply to become its certified installer.
      “19 NYCRR Part 1210 requires a certified installer to be on site while any manufactured home is being installed. “A person who intends to own and occupy a manufactured home may apply for certification as the installer of such manufactured home” pursuant to the requirements contained within Part 1210. Should a homeowner choose to complete a required component of the installation, that work shall be supervised and certified by an installer holding certification issued pursuant to part 1210.”
  • Building code adoptedAdopted

    The New York State Uniform Fire Prevention and Building Code for construction statewide outside New York City, including residential construction in towns and other local governments.

    • The Uniform Code took effect January 1, 1984.
    • New York City was permitted to retain its own code.
    • Cities, towns, and villages outside New York City do not need to adopt the Uniform Code affirmatively; it is automatically in effect.
    • A local government cannot exclude itself from all or any part of the Uniform Code.
    • Building permits must be required for work that must conform to the Uniform Code, subject to permitted exceptions.

    effective date: 1984-01-01

    “The Uniform Code is applicable in every part of the State (except the City of New York, which was permitted to retain its own code).”
    2 more reviewed findings on this topic
    • Adopted — The New York State Uniform Fire Prevention and Building Code in Nassau County, outside New York City.
      “The code, called the New York State Uniform Fire Prevention and Building Code (the “Uniform Code”), took effect January 1, 1984 and prescribes minimum standards for both fire prevention and building construction. The Uniform Code is applicable in every part of the State (except the City of New York, which was permitted to retain its own code).”
    • Adopted — New York State Uniform Fire Prevention and Building Code in Nassau County
      “The Uniform Code, which took effect on January 1, 1984, prescribes the minimum standards for building construction in New York. It is applicable in every part of the State with the exception of New York City, which is currently permitted to retain its own code.”
  • InspectionsRequired

    Construction work for which a building permit has been issued and which is subject to the Uniform Code or Energy Code, administered by the applicable local authority having jurisdiction throughout New York State except New York City.

    • Inspections may be performed in person or remotely when the authority determines the remote inspection can be performed to the same level and quality and provides sufficient information; otherwise an in-person inspection is required.
    • Where applicable, inspections include the worksite before permit issuance, footing and foundation, concrete slab preparation, framing, structural/electrical/plumbing/mechanical/fire-protection systems, fire-resistant construction and penetrations, heating appliances/chimneys/flues/gas vents, Energy Code compliance elements, manufactured buildings or homes, and a final inspection.
    • Permit work must remain accessible and exposed until inspected and accepted; the permit holder must notify the authority when work is ready for inspection.
    • The state minimum standards do not require regular periodic inspections of owner-occupied one- and two-family dwellings or agricultural buildings used directly and solely for agricultural purposes, but this does not limit inspections invited by the owner or required where conditions threaten or present a public-health, safety, or welfare hazard.

    maximum interval for periodic fire-safety and property-maintenance inspections of multiple dwellings and nonresidential occupancies: <= 3 years (This periodic-inspection interval does not apply as a requirement to owner-occupied one- and two-family dwellings or qualifying agricultural buildings.)

    “Each authority having jurisdiction shall include in its code enforcement program provisions requiring the authority having jurisdiction, or an individual or entity contracted by the authority having jurisdiction and satisfying the requirements set forth in section 1203.2 (e)(2), to perform construction inspections required by the Codes including those listed in this paragraph, either in-person or remotely.”
    2 more reviewed findings on this topic
  • Certificate of occupancyRequired

    Work subject to a building permit and the Uniform Code or Energy Code, and structures or portions converted from one use or occupancy classification or subclassification to another, throughout New York State except New York City.

    • Permission to use or occupy covered buildings or portions is granted only by issuance of a certificate of occupancy or certificate of compliance, except as provided for temporary certificates of occupancy.
    • Before issuance, the authority must inspect and determine compliance with applicable Codes and, where applicable, review structural-observation statements, special-inspection reports, flood-hazard certifications, Energy Code test results, and manufactured-building or manufactured-home seals, insignias, and data plates.
    • A temporary certificate may be issued before completion for a specified period and specified portions, subject to safe occupancy, operational fire and life-safety components, required means of egress, and completion of remaining work.

    temporary certificate period: specified period (The permit holder must undertake to bring the structure into full compliance with the Codes.)

    “The code enforcement program shall provide that, except as provided in section 1203.3 (d)(4), permission to use or occupy a building or structure, or portion thereof, for which a building permit was previously issued, or which has been converted from one use or occupancy classification or subclassification to another, shall be granted only by issuance of a certificate of occupancy or a certificate of compliance.”
    3 more reviewed findings on this topic
  • Septic inspectionLimited

    Post-construction certification for residential alternative onsite wastewater treatment systems under Appendix 75-A.

    • A design professional must supervise construction.
    • The design professional must certify after construction that supervision occurred and that construction conforms to approved plans.
    • The cited passage establishes certification, not a general periodic inspection schedule for routine operation.
    “a design professional shall provide [...] a certification”
  • Off-grid sanitationAllowed (with conditions)

    Use of an individual onsite wastewater treatment system where a municipal or communal wastewater system is unavailable.

    • The system must comply with statewide Appendix 75-A minimum standards.
    • Alternative systems require prior review and approval by the State or county health department official having jurisdiction.
    • Design must be prepared by or under the supervision of a design professional.
    “when a municipal or communal system is not available”
  • Mandatory utility hookupConditional

    Residential realty subdivisions, including subdivisions of fewer than 50 lots.

    • Community water and/or sewers may be required when public services are available, groundwater quality or quantity is poor, or site conditions are unacceptable for onsite wastewater treatment systems.
    • The source addresses subdivision approval and does not establish a universal statewide connection mandate for every individual residential parcel.
    “Yes, if there is good reason such as: public services are available”
  • Agricultural exemptionConditional

    Farm operations located within a New York agricultural district, including associated land, on-farm buildings, equipment, manure processing and handling facilities, and qualifying agricultural practices.

    • The protection applies only to farm operations in an agricultural district.
    • Local governments must exercise their planning and land-use authority consistently with Article 25-AA of the Agriculture and Markets Law.
    • Local governments may not unreasonably restrict or regulate the covered farm operation unless public health or safety is threatened.
    • Only farm operations are protected; the Department evaluates whether the regulated activity encompasses a farm operation.
    • The reasonableness analysis considers whether the restriction is unreasonable on its face and as applied to the particular situation, and depends on the totality of the circumstances.
    • A farmer, municipality, or other eligible requester may seek a Department opinion concerning the effect of a proposed or existing local law or ordinance.
    • If the Department determines that a local law or ordinance is unreasonably restrictive, it may seek remediation and the Commissioner may issue an order to comply or bring an enforcement action.
    “Local governments, when exercising their powers to enact and administer comprehensive plans and local laws, ordinances, rules or regulations, shall exercise these powers in such manner as may realize the policy and goals set forth in this article, and shall not unreasonably restrict or regulate farm operations within agricultural districts in contravention of the purposes of this article unless it can be shown that the public health or safety is threatened.”
    2 more reviewed findings on this topic
    • Conditional — Farm operations within New York agricultural districts seeking protection from unreasonable local planning, zoning, land-use, or permitting restrictions.
      “shall not unreasonably restrict or regulate farm operations within agricultural districts in contravention of the purposes of this article unless it can be shown that the public health or safety is threatened.”
    • Available (with conditions) — Agricultural uses and agricultural-use structures within the Adirondack Park Agency jurisdiction, including relevant Freshwater Wetlands Act and Wild, Scenic and Recreational Rivers System Act permitting contexts.
      ““Agricultural uses” and “agricultural use structures” are generally exempted from permitting requirements under New York State’s Adirondack Park Agency Act”
  • Building in a floodplainRequired

    Development in FEMA-mapped Special Flood Hazard Areas in New York State, with local administration by the municipality having jurisdiction.

    • Local communities participating in the National Flood Insurance Program regulate development in Special Flood Hazard Areas.
    • Private development is subject to local floodplain development permits.
    • Development funded and undertaken by the State or Federal government is an exception to the local-permit rule and is regulated by the responsible agency, subject to technical assistance by NYSDEC and FEMA.
    • Each participating community has a designated floodplain administrator, usually the building inspector or code enforcement official.
    • The local laws apply to development undertaken by any county, city, town, village, school district, or public improvement district within the community.
    • The source states that any new structure or structure substantially improved or substantially damaged is subject to floodplain development regulations, with substantial improvement or damage exceeding 50% of the structure’s market value.

    substantial improvement or damage threshold: > 50 percent of structure market value

    “Private development is subject to local floodplain development permits.”
  • Campground & park staysLimited

    Temporary camping at New York State Department of Environmental Conservation campgrounds statewide.

    • All campers must register and obtain a camping permit.
    • Check-in is from 2:00 p.m. to 9:00 p.m.; campers must register and occupy the campsite by 9:00 p.m. on the first reservation night or the campsite may be re-rented and fees may be forfeited.
    • Campers must vacate by 11:00 a.m. on the final day.
    • Camping permits are limited to 14 nights but may be renewed depending on site availability.
    • From July 1 through Labor Day, only 14 cumulative nights of camping can be obtained at any campground.
    • Campsite occupancy is limited to 6 persons, two tents or one hard-wheeled equipment and one tent, and two vehicles; occupancy varies for Family campsites.
    • Violation of any campground rule is grounds for eviction; an evicted person is not entitled to a refund or to return for one week.

    maximum permit duration: <= 14 nights (May be renewed depending upon availability of sites.) · seasonal cumulative camping limit: <= 14 nights (From July 1 through Labor Day, at any campground.) · campsite occupancy: <= 6 persons (Occupancy varies for Family campsites.)

    “All campers must obtain a camping permit. Campers may check in from 2:00 p.m. to 9:00 p.m. but must register and occupy their campsite by 9:00 p.m. on the first night of their reservation or the campsite will be subject to re-rental and fees may be forfeited. Campers must vacate their campsite no later than 11:00 a.m. on the final day. Camping permits will not be issued for more than 14 nights but may be renewed depending upon availability of sites. From July 1 through Labor Day only 14 cumulative nights of camping can be obtained at any campground.”
  • county building authorityLimited

    County administration and enforcement of the Uniform Code and Energy Code within a local government, including unincorporated town areas, when the local government has opted out or when the Secretary of State designates the county.

    • Every local government ordinarily administers and enforces the Uniform Code and Energy Code.
    • A local government may opt out by local law enacted before July 1; the opt-out becomes effective January 1 of the following year.
    • After a local-government opt-out, the county administers and enforces the codes within that local government.
    • The county may itself enact a local law opting out; if both local government and county opt out, the Secretary of State administers and enforces the codes.
    • Counties may charge fees to defray administration and enforcement costs.
    • A responsible county must establish a code-enforcement program by local law, ordinance, or other appropriate regulation.

    local-government opt-out deadline: < July 1 · successor enforcement date: January 1 (the January 1 next succeeding the effective date of the local law)

    “The secretary may designate the county in which such local government is located to administer and enforce the uniform code in such local government.”
    One more reviewed finding on this topic
    • Limited — New York counties' administration and enforcement of the Uniform Fire Prevention and Building Code, and county adoption of higher or more restrictive construction standards affecting residential construction.
      “In such event the county in which said local government is situated shall administer and enforce such codes within such local government [...] unless the county shall have enacted a local law providing that it will not enforce such codes within that county.”
  • county zoning authorityNone

    New York counties' authority to adopt Euclidean zoning regulations for unincorporated land.

    • New York State law authorizes zoning power for cities, towns, and villages, not counties.
    • Counties retain other land-use-related powers under separate statutes and municipal home rule provisions, but those powers are not general county zoning authority.
    “No enabling legislation had been adopted that delegates zoning power to counties.”

Inside cities and towns in Nassau County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

  • Zoning districtsPublished

    The Town of Hempstead Building Zone Ordinance and its zoning districts.

    • The Town page states that the online version is maintained by General Code Publishers.
    • Town zoning requirements changed for one- and two-family dwellings effective September 1, 2007.
    • Applications without a building permit and substantial construction by September 1, 2007 are subject to the new regulations; existing-construction maintenance applications and permits obtained after that date are also subject to the new regulations.

    effective date of zoning requirement changes: 2007-09-01

    “The online version of the Town of Hempstead Building Zone Ordinance is maintained by General Code Publishers.”
  • Permit processPartial

    Town of Hempstead building permit and inspection process.

    • This claim is town-specific and does not establish a countywide process.
    • Applicants may submit permits, monitor application status, request inspections, review previous permits, message town staff, and print permits through the online portal.
    “Residents of Hempstead Town may submit permits through the interactive portal”
    One more reviewed finding on this topic
    • Published (with conditions) — Permit submission and inspection-request process in the Town of Hempstead.
      “Residents of Hempstead Town may submit permits through the interactive portal, monitor the status of their applications, request inspections, review their previous permits, message town staff with any inquiries and print their permits from the comfort of their own home.”

Set by your town or city, not the county

In New York, zoning is adopted by each town or city, so Nassau County has no county-wide answer on these. Find your town or city in the list of places on this page, or call its clerk or zoning administrator.

  • Minimum dwelling size
  • Minimum lot size
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Short-term rentals

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Well permit — Private well permit requirements.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Water rights & wells in Nassau County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from New York’s water agency.

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

Household wellExempt — no permit or water right

Statewide, private residential wells need no state withdrawal permit. On Long Island (Nassau and Suffolk) county health departments require a local permit to construct a private well plus water-quality certification.

Limit: state withdrawal permit only for systems >=100,000 gpd; domestic wells exempt

NY Environmental Conservation Law 15-1501 ↗
  • Nassau-Suffolk Sole Source Aquifer

    Nassau and Suffolk sit entirely over an EPA-designated Sole Source Aquifer (1978) supplying all local drinking water. A new private well requires a county Department of Health Services permit and water-quality certification, and parts face saltwater intrusion and over-pumping.

    Suffolk County Dept of Health Services — Private Well Water Standards ↗
  • Long Island Special Groundwater Protection Areas (nine SGPAs)localized of county

    Nine statutorily designated deep-recharge zones (2 in Nassau, 7 in Suffolk) governed by a special groundwater-protection management plan; new development and wells within an SGPA face heightened land-use review to preserve deep-flow recharge.

    NY Environmental Conservation Law 55-0113 ↗

Regulated-riparian state (large uses permitted). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the New York state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Nassau County, New York

Is Nassau County a good place to live off-grid or homestead?

Nassau County scores 27/100 on the Bolthole Index, a weak county profile. Its strengths: a durable current and mid-century hazard profile. Watch-outs: little seclusion — roughly 3,161,571 people within a 30-minute drive and higher long-term carry cost.

Do you need a building permit in Nassau County, New York?

Nassau County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Nassau County Department of Health, Bureau of Environmental Engineering. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Nassau County, New York?

Land in Nassau County runs about $62,463 per acre, based on the latest county data.

What is the water situation in Nassau County?

Nassau County gets about 45.6" of rain a year, with severe drought in roughly 3.5% of years. On water rights, Nassau County lies in the Nassau-Suffolk Sole Source Aquifer — Nassau and Suffolk sit entirely over an EPA-designated Sole Source Aquifer (1978) supplying all local drinking water. A new private well requires a county Department of Health Services permit and water-quality certification, and parts face saltwater intrusion and over-pumping..

How remote is Nassau County?

A representative private-land location has about 3,161,571 people within a 30-minute drive and 22,147,798 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Nassau compares in New York

Compare side-by-side →See all 62 New York counties ranked →