Across 31 permits filed since 2025-03-10, the median is $18,000; half of projects fall between $10,000 and $42,500. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in White Plains, NY actually reported when they pulled permits.
Recent filings
- Wiring of addition including bathroom and mudroom. (2025-00886-BLDG)White Plains · 2026-08-13$9,000
- Widen and replace driveway, front porch platform extension and resurface walkway with new brick pavers.White Plains · 2026-06-02$13,800
- Wire electrical in second floor addition comprised of a bedroom and bathroom.White Plains · 2026-05-18$8,000
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 home addition permits in White Plains, NY came in between $10,000 and $42,500. 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
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