Backyard project permits in Denver, CO
Denver splits most backyard projects into a building permit and a separate zoning permit, and the zoning rules change with the neighborhood context (Suburban S-, Urban Edge E-, Urban U-).
Rules last checked by a person on October 19, 2026. Guidance only; confirm with Denver before you build.
| Typical project | Permit? |
|---|---|
| Shed10 by 12 ft shed, 10 ft tall, no power | No: no permit as described |
| Deck160 sq ft freestanding deck, 24 in high | Yes: Zoning permit |
| Fence6 ft wood fence in the back yard | Yes: Zoning permit |
| Garage24 by 20 ft detached garage with lights | Yes: Zoning permit, Building permit, Sewer use and drainage permit (SUDP), Electrical permit |
| ADU650 sq ft detached backyard cottage | Yes: Zoning permit, Building permit, Sewer use and drainage permit (SUDP) |
Check your exact lot
Permit office
Denver Building and Fire Code; Denver Zoning Code (2010, republished Feb 2025) and Former Chapter 59.
- Denver e-permits (Accela)
- Single-family and duplex projects
- Denver zoning map
- Denver Zoning Code
- Phone: 311 (720-913-1311)