Unincorporated Weld County runs on the 2024 International Codes effective June 15, 2026 (2023 NEC for electrical), with local amendments in Chapter 29 of the Weld County Code. A permit application is required for regulated building projects, reroofs included; the county's detailed permit-threshold handouts are served only to browsers, so confirm specifics with Building Inspection.

Code edition	2024 International Building, Residential, Existing Building, Mechanical, Plumbing, Fuel Gas, Energy, Property Maintenance, and Pool/Spa Codes — effective June 15, 2026, county-wide in unincorporated areas. 2023 National Electrical Code remains.
Amendments	Local amendments to all adopted codes live in Chapter 29 of the Weld County Code (on Municode).
Permit	A permit application is required for all regulated building projects; Chapter 29 requires specific declarations from every applicant.

Details to confirm with the county

We couldn't confirm the following from Weld County's official pages. Check these with the county before you rely on them:

• Exact reroof permit-exemption thresholds are published in county PDF handouts that the website serves only to interactive browsers — confirm with Building Inspection, (970) 400-6100.
• Greeley, Evans, and other incorporated cities permit through their own building departments — their rules differ.

Verified July 2026 · Source: Weld County — Building Codes, Design Criteria and Fees