Annexation is the legal process allowing property located in an unincorporated area of Adams County to become part of Commerce City. The property must be “contiguous to” (next to and touching) existing Commerce City boundary lines to qualify for annexation. The property is considered within the boundary of the city limits once annexation is complete. After annexation, a property also becomes subject to the city's municipal code and other local regulations.

In general, the proposed property must be within the Commerce City Urban Growth Boundary and comply with the Commerce City Comprehensive Plan. At least one-sixth of the perimeter of the area proposed to be annexed must be contiguous with the existing city limits.

Learn more about annexing a property into Commerce City 

Additional annexation forms:

• Pre-Annexation Agreement
• Annexation Information Sheet
• Annexation Petition
• Annexation Impact Report Requirements
• Development Review Application (Must be submitted along with annexation documents)

Most annexations take 4 to 6 months to complete, but this time frame can vary with unique circumstances. A property must be zoned within 90 days of its annexation. Depending on the location of the property, the applicant may also need to join one of the city’s General Improvement Districts (GIDs). If applicable, city staff will help to explain the process and associated fees with this concurrent request.