Denver ADU Permit Timeline: How Long Does It Take?

Another top search question: How long does it take to get an ADU permit in Denver? Even with improvements, ADU permitting in Denver requires thoughtful coordination between zoning review, building plan review, and utility approvals. Detached ADUs often involve additional considerations like sewer taps, fire access, and structural review. Historic districts and design overlays add another layer of evaluation. 

The timeline varies based on those structural and zoning reviews as well as design complexity, however most ADU projects move through these steps:

1. Zoning review
2. Structural & Building Plan review
3. Utility approvals
4. Final permit issuance
5. Site Preparation
6. Construction
7. Site Finishes 
8. Certificate of Occupancy

This complexity is another reason you want clarity at the outset of your project. It protects your investment. No vague estimates. No “we’ll figure it out later.” Just a clear scope, realistic timelines, and a mapped-out process from Day One. 

It’s something we demand of ourselves and provide for our clients. And whether you work with Denver Custom ADU or not, it’s something you should demand of your ADU builder.