The City and County of Denver requires a roofing permit once work touches more than 10% of the roof or 200 square feet (two squares) — and always for a full replacement, any material. Denver publishes a roofing guide and checklist, requires licensed and insured contractors, and lets owners choose city inspection or an approved independent third-party inspector.

When a permit is required	Work on more than 10% of the roof or more than 200 square feet — and every full replacement regardless of size or material.
Inspection options	City inspection through Denver Building Inspection, or an approved independent third-party roofing inspector under the city's ADMIN 130.2B policy.
Energy code on reroofs	Denver's roofing guide requires reroof insulation either above the sheathing (R-30ci) or below it (R-38 flat / R-49 attic) — a cost line many out-of-town bids miss.
Contractor rules	Contractors must be licensed and insured with the city; asbestos rules (CDPHE) can require a certified inspection before tear-off on older roofs.

Details to confirm with the county

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

• Current Denver Building Code amendment cycle details — confirm the in-force edition with CPD when specifying code-driven upgrades.

Verified July 2026 · Source: Denver CPD — Roofing Guide & Checklist (2024) / ADMIN 130.2B third-party inspection policy