Across 35 permits filed since 2025-04-29, the median is $65,000; half of projects fall between $37,500 and $122,500. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners on Long Island actually reported when they pulled permits.
Recent filings
- INSTALL A 16' X 30' IN-GROUND POOL INCLUDING DRYWELLS, FENCING, AND ALARMS IN ACCORDANCE WITH NYS AND RVC CODES. LOCATION SURVEY REQUIRED PRIOR TO POURING CONCRETE. FINAL SURVEY REQUIRED FOR LETTER OF COMPLETION. REFERENCE EP2026-0211, FGRockville Centre · 2026-09-16$40,000
- INSTALL 18' X 38' INGROUND POOL INCLUDING DRYWELL, FENCING, AND ALARMS INSTALLED IN ACCORDANCE WITH NYS & RVC CODES. FINAL SURVEY REQUIRED FOR LETTER OF COMPLETION.Rockville Centre · 2026-09-04$89,000
- Pool - minor alterations to existing inground poolLawrence · 2026-08-25$10,000
How to read these numbers
Permit valuations are the project cost the applicant reports to the building department. They skew slightly low — nobody rounds up for the permit fee — and scope varies, so the middle-half range is the honest picture: half of all inground pool permits on Long Island came in between $37,500 and $122,500. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
Same project, other places
Inground pool in New JerseyInground pool in New YorkInground pool in Connecticut