Accessory Dwelling Unit (ADU) Regulations in Brighton

Brighton has specific size and design standards to ensure ADUs are well-integrated into neighborhoods:

• Maximum ADU Size: Cannot exceed 50% of the primary home’s living space or 1,200 square feet, whichever is smaller.
• Architectural Compatibility: ADUs must match the design, materials, and character of the main residence.
• Utility Connections: Homeowners must demonstrate adequate water, sewer, and utility services for both the primary residence and ADU.

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Max Size- 1,200 sq/ft or 50% of the primary structures (whichever is less)

Max Height- Cannot exceed the height of the primary structure

To qualify for an ADU in Brighton, your property must meet the following conditions:

• ADUs are only allowed on lots with a detached single-family home or duplex.
• Only one ADU is permitted per lot.
• ADUs can be either detached or attached (such as a converted basement or attic space).
• For agricultural, commercial, or industrial properties, one ADU may be permitted for an on-site caretaker or watchman under specific conditions.

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• HB 24-1152 requires cities to allow ADUs without designated parking, except in these cases:
  ✔ If no parking is currently required for the primary home, parking cannot be required for the ADU.
  ✔ If the lot does not have an existing parking space for the primary home, no additional parking is required.

Driveways must comply with city standards, ensuring safe and functional property access.

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There are no known utility and infrastructure requirements in Brighton

• HB 24-1152 prohibits cities from requiring owner occupancy meaning ADUs can be rented out separately from the primary home.
• ADUs cannot be sold separately from the main home—they must remain part of the same lot.
• Short-term rentals (STRs) are still prohibited, except in Planned Unit Developments (PUDs) where STRs were previously allowed.

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Under HB 24-1152, all ADU approvals must be handled administratively—meaning there are:
✔ No public hearings
✔ No subjective design reviews
✔ No neighborhood approval required

To build an ADU in Brighton, homeowners must obtain zoning approval, building permits, and pass inspections to ensure compliance with city codes.

For non-residential properties, additional requirements apply:

• The ADU must be clearly secondary to the primary business or agricultural use.
• The unit must be occupied by an on-site caretaker or employee.
• The ADU must meet all commercial property development and parking requirements.

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Building an ADU in Brighton requires careful planning, compliance with zoning laws, and expert execution and that’s where Kindred Tiny Homes comes in.

• We handle everything from design and permitting to construction and final approvals.
• We navigate Brighton’s ADU requirements seamlessly, ensuring your project is fully compliant and hassle-free.
• We create high-quality, beautifully designed ADUs that enhance property value and maximize functionality.

If you’re considering building an ADU in Brighton, contact us today for a free consultation, we’ll walk you through your options and help bring your vision to life!

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