Accessory Dwelling Unit (ADU) Regulations in Broomfield

Max Size- 800 sq/ft or 50% of the primary structure (whichever is smaller)

Max Height- Can’t exceed height of primary residence

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

• Only one ADU is allowed per lot.
• The ADU must be accessory to a single-family home.
• ADUs must meet all setback requirements based on the zoning district.

Broomfield has specific size and occupancy limitations for ADUs:

• Maximum ADU Size:
  
  • ADUs cannot exceed 50% of the primary home’s footprint (excluding garages, porches, or similar areas).
  • The maximum size allowed is 800 square feet, whichever is smaller.

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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.

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• ADUs must connect to the primary home’s water and sewer lines, which saves the homeowners money
• Homeowners should coordinate with utility providers for electrical, gas, internet, and other services.
• If the primary home uses a septic system, homeowners must contact the Health Protection Division to determine whether the system can accommodate an ADU.

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• 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

Building an ADU in Broomfield requires obtaining zoning approval, a building permit, and inspections. The permit application process includes:

1. Submitting a General Permit Application to the Building Department.
2. Providing supporting documents, such as site plans and architectural drawings.
3. Recording a Declaration of Use, which documents the size and location of the ADU and ensures compliance with Broomfield’s municipal code.

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Building an ADU in Broomfield 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 Broomfield’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 Broomfield, contact us today for a free consultation, we’ll walk you through your options and help bring your vision to life!

Design & Aesthetic Requirements

• ADUs must be architecturally consistent with the primary home.
• In developments with specific zoning or site plan requirements, the ADU must follow the same design standards.
• If there are no design standards, at least 50% of the ADU’s exterior must use materials similar to the primary home.

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