⚠️ This information is for educational purposes. Always verify current regulations with the Fort Collins Planning Department before starting your project.
Fort Collins ADU Regulations at a Glance
Here are the key zoning rules for Accessory Dwelling Units in Fort Collins, Colorado. These regulations apply as of 2026.
| Regulation | Requirement |
|---|---|
| Maximum Size | 1,200 sq ft |
| Property Setbacks | 5 ft rear, 5 ft side |
| Extra Parking Required | Required (1 space) |
| Owner Occupancy | Required |
Additional Local Requirements
- ADU on lots 3,500 sq ft minimum
- Minimum ADU size: 300 sq ft
- One ADU per single-family lot
- Short-term rental of ADU prohibited
- Fort Collins has its own established ADU program
📥 Get the Complete Fort Collins ADU Cheat Sheet
To get the step-by-step permit checklist and the official local contacts, download the Complete Fort Collins ADU Cheat Sheet.
Download the Fort Collins PDF Guide — $12Frequently Asked Questions About ADUs in Fort Collins
Can I build an ADU in Fort Collins?
Yes, Fort Collins allows ADUs under Colorado state law and local zoning ordinances. [ADDITIONAL_FAQ_1]
How big can my ADU be in Fort Collins?
The maximum size for an ADU in Fort Collins is 1,200 square feet, subject to setback and lot coverage requirements.
Do I need a permit for an ADU in Fort Collins?
Yes, all ADUs require a building permit from the Fort Collins Building & Safety Department.
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