Boulder Zoning & Land Use Guide
Last updated: Verified:
Key Zoning Facts
Regulatory Layers That Apply in Boulder
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA Flood Zones: Applicable
- View FEMA Flood Map
County — Boulder County
- Role: Property records, tax assessment, unincorporated area planning
City / Municipal
The city's zoning ordinance, building codes, and local permits form the primary layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- HOA / CC&Rs common: Yes
- Check HOA CC&Rs for additional restrictions.
Primary Zoning Districts
| District Code | Name | Min Lot | Max Height | Front Setback | Side Setback | Rear Setback | FAR |
|---|---|---|---|---|---|---|---|
| RL-1 | Residential - Low 1 | 30,000 sq ft | 35 ft | 25 ft | 10 ft | 25 ft | — |
| RL-2 | Residential - Low 2 | 7,000 sq ft | 35 ft | 20 ft | 5 ft | 15 ft | — |
| BMS | Business - Main Street | None | 35-55 ft | 0 ft | 0 ft | 10 ft | — |
ADU Rules in Boulder
ADUs:Allowed
- Max Size
- 1,000 sq ft
- Max Height
- 22 ft
- Rear Setback
- 5 ft
- Side Setback
- 5 ft
- Parking
- No additional parking required
- Owner Occupancy
- Required for either primary or ADU
- Permit Timeline
- 6-10 weeks
Official Sources
Frequently Asked Questions
Frequently Asked Questions
Can I build an ADU in Boulder?
Yes. Boulder allows ADUs in residential zones, with local regulations supplementing Colorado HB 24-1152. Boulder has permitted ADUs for many years, and its regulations address size, height, and design compatibility.
How do I find the zoning for my property in Boulder?
Use the City of Boulder's online zoning tool through the Planning & Development Services website, or call (303) 441-1880.
What zones allow multi-family housing in Boulder?
Multi-family housing is allowed in Residential Medium (RM) and Residential High (RH) districts, as well as Mixed Use and Business districts.
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Zoning codes and building regulations change frequently. Always verify current requirements with your local planning department and building authority before making any decisions.