Unincorporated Douglas County permits reroofs under the 2021 International Codes with an unusually explicit posture: the county states it does not require roofing materials or attachment to meet high-wind or severe-climate conditions, except above 7,000 feet where both high-wind nailing and ice barrier become mandatory. Repairs under one square are permit-exempt; wood shakes are banned.

Permit	Minor repairs under one roofing square (100 sq ft) need no permit; replacement and larger repairs do. Each separate structure requires its own permit (exception: one-story detached accessory structures under 200 sq ft).
Elevation splits the rules	Wind rating minimum is 90 mph Class D (ASTM D7158) up to 7,000 feet and 120 mph Class G above; high-wind nailing and ice-barrier underlayment are required only above 7,000 feet.
Materials	One layer only — no overlays. Drip edge required (4"x2" eaves, 2"x1" or D-style rakes). Wood shakes and shingles are not permitted; mapped fire-intensity areas require Class A coverings under the 2025 Colorado Wildfire Resiliency Code.
Inspections	Final inspection for all roofing permits and a drip-edge inspection for asphalt; mid-roof inspection only for tile, slate, stone-coated steel, or batten systems at 25-50% complete.

Details to confirm with the county

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

• Castle Rock, Parker, and Lone Tree permit through their own building departments — their rules differ.

Verified July 2026 · Source: Douglas County — Roofing permits & FAQs