Across 169 permits filed since 2025-03-07, the median is $22,500; half of projects fall between $12,000 and $45,000. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in Nassau County, NY actually reported when they pulled permits.
Recent filings
- The construction of interior alterations to the existing third floor to create an ADA accessible bathroom within existing chemistry lab as per architectural plans prepared by Joseph M. Spina R.A. 6/18/26 and engineering plans prepared by BrVillage of Mineola · 2026-09-02$320,000
- The construction of a 19.58 x 56.5 (oa) (1,106 sf) one (1) story addition to an existing two (2) story (type IIB) (fire sprinklered) building to accommodate the use of existing tenant "Piri Piri", interior alterations to existing first flooVillage of Mineola · 2026-09-01$375,000
- Residential Piping & Fixtures - Run piping for first floor three-piece bathroom renovation and basement washer and utility sinkVillage of Garden City · 2026-08-31$7,500
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 bathroom remodel permits in Nassau County, NY came in between $12,000 and $45,000. 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
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