Fees, valuation & enforcement
Permit fees are a project input. Enforcement exposure is a project risk. Use the official schedule where available, then confirm valuation, trade permits, plan review, and inspection charges with the Authority Having Jurisdiction.
Official fee pathway
The final charge may depend on declared construction value, occupancy classification, square footage, plan review, state surcharges, trade permits, technology fees, and inspection activity. Do not use a neighboring city’s fee table as a substitute for this jurisdiction.
Fee desk contact
Nassau County Planning Commission: 516-571-5844; DPW: 516-571-6900
Ask the counter to confirm current charges before submitting a project with multiple trades or a change of use.
Financial exposure
Plan for building, mechanical, plumbing, electrical, fire, energy, zoning, septic, right-of-way, or other reviews that the project scope triggers. The lowest initial permit fee is not always the lowest project cost.
Enforcement exposure
When work begins without authorization, the agency may halt the site, require corrective plans, impose additional fees, withhold inspection release, or require concealed work to be exposed for review.
Closeout exposure
A missing final inspection or certificate can complicate occupancy, refinancing, sale, insurance, and utility connection. Preserve the approved plans and signed inspection record through closeout.
Professional field note
Even when a cosmetic or minor project does not require a building permit, zoning, floodplain, shoreline, historic, utility, fire, or right-of-way controls may still apply. Confirm the full jurisdictional picture before work starts.
Source trail
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
This record is marked Municipal Fallback. Confirm whether a city, state agency, or other local authority controls the parcel before filing.
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact Nassau County Planning Commission: 516-571-5844; DPW: 516-571-6900.
N/A; municipal review timing varies. Nassau County’s §239-f building-permit review is generally reported to the municipality within 10 working days when applicable.
Contact the city, town, or village building department listed by Nassau County for the property’s location. For demolition, obtain the County Health Department rodent-free certificate before disturbing the site; for County roads or utilities, coordinate with Nassau County DPW.
Nassau County’s official pages state that the County does not issue ordinary building permits; authority rests with the towns, villages, and cities. The applicable municipality administers the 2025 New York State Uniform Fire Prevention and Building Code and 2025 Energy Conservation Construction Code, effective December 31, 2025, plus local laws. Nassau County may review County-road, sewer, subdivision, fire-marshal, or other specialized permits. No countywide private-building exemption list was identified. The local building authority determines exemptions for ordinary repairs, cosmetic work, agricultural structures, sheds, fences, and finish work. Demolition generally requires a local permit plus a Nassau County Health Department rodent-free certificate.
Why permit costs vary
Building departments commonly calculate charges from valuation, occupancy, floor area, project type, plan review effort, trade scope, state surcharges, and inspection activity. A remodel that appears small on paper may still trigger structural, energy, fire, or utility review. Ask the permit counter which disciplines apply before you finalize the construction budget.
The same discipline applies to enforcement. Correcting unpermitted work after finishes are installed can require demolition, revised plans, additional inspections, and schedule disruption. Authorization is usually the less expensive project-management decision.