To move forward with a home addition in Denver, you must navigate several permit types simultaneously through the city’s E-permits system. The process ensures your project is both safe and compliant with local regulations.

The primary permits and requirements include:

• Zoning Review: This is your first priority. The city must determine if your lot can support your plans by checking height limits for second-story additions or setback requirements for ground-level expansions.
• Residential Building Permit: This requires a complete application package, including detailed site plans and stamped structural drawings from a licensed structural engineer. These drawings verify that your existing foundation can safely support the new loads.
• Sewer Use and Drainage Permits: These are required to ensure the addition integrates correctly with the city’s infrastructure.
• Universal Recycling and Composting Ordinance: If your addition exceeds 500 square feet, you must comply with these specific city standards.

Given that Denver is known for expansive clay soils, we also recommend securing a geotechnical report early in the process. This helps assess soil stability and drainage patterns before you finalize construction drawings, potentially saving you from costly redesigns later. The typical review timeline for these applications is four to eight weeks.

All information is for general informational purposes and may be updated without notice. Consult a licensed structural engineer or qualified professional for definitive diagnosis and design recommendations.

• Denver Home Addition Permit Requirements: The Complete 2026 Guide