Nassau County Permit Search

Building permits in Nassau County are issued by municipal building departments under the New York State Building Code. Long Island's most populated county with over 1.3 million residents.

Permit records reveal critical information about a property's construction history, planned renovations, and code compliance status. Unpermitted work, expired permits, and open violations create risk for buyers, lenders, and insurers.

RegWatch aggregates building permit data across Nassau County municipalities, providing standardized access to:

• Active permits — currently open building permits and their status
• Historical permits — completed work permits, certificates of occupancy
• Permit types — new construction, alterations, demolition, mechanical/plumbing/electrical
• Contractor information — licensed contractors associated with each permit
• Inspection status — scheduled and completed inspections
• Estimated costs — declared construction costs from permit applications

Whether you're evaluating a property's improvement history, checking for unpermitted work, or monitoring construction activity in a neighborhood, RegWatch delivers the permit data you need.

Search building permits for any Nassau County property instantly. Enter an address to see active permits, construction history, and inspection status. Start free.