Across 71 permits filed since 2025-01-25, the median is $115,000; half of projects fall between $48,000 and $239,192. 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 Queens County, NY actually reported when they pulled permits.
Recent filings
- RENOVATION OF EXISTING 2 FAMILY, 2 STORY & BASEMENT RESIDENTIAL BUILDING. NO CHANGE IN USE, EGRESS, OR OCCUPANCY.Queens · 2026-06-10$270,766
- HEREWITH FILING ALTERATION SUBSEQUENT TO APPLICATION # Q01355899-I1 FOR PLUMBING WORK IN BASEMENT, FIRST, SECOND FLOORS AS PER PLANS FILED.Queens · 2026-05-29$105,000
- HEREWITH FILE ALTERATION IN ORDER TO CONVERT A ONE FAMILY DWELLING TO A TWO FAMILY DWELLING AND TO DO A REAR EXTENSION TO 2 STORY AND BASEMENT BUILDING, TO ADDRESS VIOLATION NUMBERS 39174603M; 39174604Y AND TO OBTAIN A NEW CERTIFICATE OF OCQueens · 2026-05-28$398,000
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 basement finishing permits in Queens County, NY came in between $48,000 and $239,192. 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
Basement finishing in New YorkBasement finishing in ConnecticutBasement finishing on Long Island