Across 172 permits filed since 2025-01-28, the median is $10,000; half of projects fall between $3,000 and $70,000. 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 Erie County, NY actually reported when they pulled permits.
Recent filings
- *** AKA 1522 Jefferson *** Install 3' x 27.5' walkway extension at rear. Install concrete extension around transformer pad. Repair in-kind ~ 6 sidewalk blocks. Buffalo · 2026-07-27$7,700
- Expansion of building: four stories, elevators, restrooms, and lounges. New service for fire alarm extension, lights, and power.Buffalo · 2026-07-23$3,720,000
- Provide labor and materials to replace the existing 100-amp SEU (Service Entrance Unit) cable serving the electrical system. Scope includes removal of the existing service cable, installation of new properly sized 100-amp SEU cable, securinBuffalo · 2026-07-15$3,000
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 Erie County, NY came in between $3,000 and $70,000. 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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