Solar Panel Rules in Denver, CO (2026)
Solar panel installation rules, mandate status, HOA restrictions, and permit process for Denver, CO.
Denver, CO does not currently have a solar installation mandate. Solar panels are a permitted use on residential and commercial properties subject to standard building permit requirements. Property owners in Denver must obtain a permit before installing solar panels. HOA restrictions on solar are limited by state law. Denver offers permit review for residential solar installations. Below you will find the current solar mandate status, HOA rules, permit process, and any historic district restrictions that apply to solar installations in Denver.
Solar Mandate Status
No Solar Mandate in Denver: Denver does not currently have a solar installation mandate for new or existing construction. Installing solar is voluntary and subject to permit requirements. Federal Investment Tax Credit (ITC) may apply — consult a tax professional for current incentive information. Colorado does not have a statewide solar mandate for new construction. Denver has ambitious climate goals — Denver Green Building Ordinance (2022) requires green building standards for new commercial and multifamily over 25,000 sqft but not single-family residential. Federal ITC (Investment Tax Credit) provides 30% credit. Xcel Energy rebates may also be available for residential solar. Colorado state income tax credit provides additional incentive.
HOA Restrictions
HOA Restrictions on Solar in Denver: Colorado Revised Statutes Section 38-30-168 prohibits HOAs from unreasonably restricting solar energy systems. HOAs may require reasonable placement and aesthetic standards but cannot prohibit solar panels that comply with local building codes. This statute applies to all Colorado HOAs and has been in effect since 2008.
Permit Process
Permit Process in Denver: Denver CPD issues solar permits. Standard residential solar systems qualify for expedited review, typically 1-3 weeks. Permit required before installation. Electrical permit required in addition to solar permit. Submit via Denver's online permit portal. Xcel Energy interconnection agreement required for grid-tied systems (Xcel serves most of Denver). Denver's high elevation and 300+ annual sunny days produce excellent solar yield.
Historic District Considerations
Historic District Considerations in Denver: Properties in Denver's historic districts or designated landmarks require Design Review for solar installations visible from public right-of-way. Contact Denver CPD Historic Preservation office for pre-application consultation. Many Denver historic homes can accommodate rear-facing or ground-mounted solar panels without visible impact. Design review process: https://www.denvergov.org/Government/Agencies-Departments-Offices/Community-Planning-and-Development/Historic-Preservation If your property is located in a historic district, contact the Denver Community Planning and Development (CPD) before designing your solar system — placement restrictions may affect system output.
Frequently Asked Questions
Can I build an ADU in Denver?
Yes. Colorado HB 24-1175 (2024) requires Denver to allow at least one ADU per single-family lot by-right. Denver had an ADU ordinance in place before state law and has continued to expand ADU allowances. You can build a detached ADU up to 1,000 sqft in most single-family zones. No owner-occupancy requirement. Building permit from Denver CPD required. Colorado does not have the California JADU concept.
What is Colorado HB 24-1175 and how does it affect Denver?
Colorado HB 24-1175 (effective August 7, 2024) requires all Colorado municipalities with population over 1,000 to allow at least one ADU per single-family residential lot by-right. It removes minimum lot size requirements targeting ADU prohibition, limits parking requirements for ADUs, and creates state enforcement. For Denver, it reinforces and expands existing ADU allowances that were already in place through the city's own ordinance.
Do I need a permit for a home business in Denver?
Yes. A Denver Business License and Home Occupation Permit (approximately $50) are required to operate a business from your Denver home. You may have up to 2 customer visits per day, no non-resident employees, and no external evidence of business. The Colorado Cottage Food Act allows home-based food production (baked goods, jams, etc.) with CDPHE registration and no revenue cap. Note Denver's altitude (5,280 ft) can affect some food production processes.
Can I do short-term rentals on Airbnb in Denver?
Yes, with a Denver Short-Term Rental License ($100/year). The property must be your primary residence. Airbnb automatically collects and remits Denver and Colorado lodging taxes (approximately 10.75% combined). Display your license number on your listing. Operating without a license carries fines of up to $999 per violation. Only one STR license per person — Denver enforces this strictly.
What are the setbacks in Denver's U-SU-A zone?
In Denver's U-SU-A zone (Urban Single-Unit A, one of the most common single-family zones), the front setback is 20 feet, side setbacks are 5 feet on each side, and the rear setback is 20 feet. Maximum lot coverage is 45% and maximum height is 35 feet (3 stories). Use Denver's online zoning map or contact Denver CPD to confirm your specific parcel's zone designation and applicable standards.
Is solar required on new homes in Denver?
No. Colorado does not have a statewide new-construction solar mandate like California. Solar is strongly encouraged — Denver's 300+ annual sunny days create excellent solar production, and Xcel Energy offers net metering. The federal Investment Tax Credit (ITC) provides a 30% credit. Colorado also has a state income tax credit for residential solar. Denver's Green Building Ordinance applies to large commercial/multifamily buildings over 25,000 sqft but not single-family homes.
How do I look up the zoning for my Denver property?
Use Denver's online zoning map at https://www.denvergov.org/Government/Agencies-Departments-Offices/Community-Planning-and-Development/Denver-Zoning-Code/Zoning-Map. Enter your address to find your Denver Zoning Code zone designation. You can also contact Denver CPD Development Services at (720) 865-2705 or visit the Webb Municipal Building at 201 W. Colfax Ave, Denver. The Denver interactive zoning map shows zone districts, overlay zones, floodplains, and historic districts.
Source: Denver Building Department — Solar Panel Permits. Last verified April 5, 2026. View source