ADU Rules in Denver, CO — 2026 Guide
Check if your Denver property qualifies for an ADU in 20 seconds
Denver ADU Rules at a Glance
Denver is considered ADU-friendly. Here are the key regulations.
- Denver legalized ADUs citywide in 2024 — all single-family zones now allow them.
- ADUs up to 1,000 sqft permitted with no owner-occupancy requirement.
- Detached ADUs can be up to 24 ft tall (two stories).
- Short-term rentals of ADUs are subject to Denver STR licensing.
What ReadyPermit Checks for Denver Properties
Enter any Denver address and get an instant ADU feasibility analysis covering:
Zoning Compliance
Verify your Denver lot is zoned for ADU construction under current CO and local rules.
Setbacks & Coverage
Check required setbacks, lot coverage limits, and height restrictions for your specific parcel.
ADU Size Limits
Calculate the maximum ADU square footage allowed based on your lot size and primary dwelling.
Permit Requirements
Understand what permits and approvals Denver requires before you can break ground.
Flood & Hazard Zones
Identify if your property falls in a flood zone, fire zone, or other hazard overlay.
Lot & Parcel Data
Pull parcel boundaries, lot dimensions, and existing structures from county records.
Check Your Denver Property Free
Enter your address below. In under 20 seconds you will know if your Denver lot qualifies for an ADU — no phone calls, no waiting.
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