Do I need a permit for addition or structural alteration in Unincorporated Arapahoe County?
Yes. In Colorado, addition or structural alteration generally requires a permit, and Unincorporated Arapahoe County is no exception.
Adding to or structurally altering a home requires a building permit and full plan review in Colorado jurisdictions; the exact submittal list and adopted code edition are set locally because there is no statewide code. Electrical and plumbing portions of the work fall under Colorado's state Electrical and Plumbing Boards and require their own state permits and inspections in addition to the local building permit.
Documents you may need
- Permit applicationrequired
- Construction drawings (floor plan, elevations, framing/structural)required
- Site plan with setbacks and lot coveragerequired
- Energy compliance and structural/engineering detailsSometimes required
Possible inspections
- Footing/foundation inspection
- Framing inspection
- Rough-in inspections for electrical, plumbing, and mechanical
- Insulation inspection
- Final inspection
Frequently asked questions
- Do I need a permit for addition or structural alteration in Unincorporated Arapahoe County?
- Yes. In Colorado, addition or structural alteration generally requires a permit, and Unincorporated Arapahoe County is no exception. Adding to or structurally altering a home requires a building permit and full plan review in Colorado jurisdictions; the exact submittal list and adopted code edition are set locally because there is no statewide code. Electrical and plumbing portions of the work fall under Colorado's state Electrical and Plumbing Boards and require their own state permits and inspections in addition to the local building permit.
- Who issues the permit in Unincorporated Arapahoe County?
- The local building department for Unincorporated Arapahoe County handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.