Accessory Dwelling Unit (ADU) Regulations in Arvada

• Max Size- 650 sq/ft
• Max Height- Must not exceed height of primary home or 24’

Aurora has established clear guidelines for detached ADUs to ensure they integrate well into existing neighborhoods.

• Detached ADUs: ADUs must be separate structures
• Size Limit: The maximum ADU size is 650 square feet.
• Height Restriction: ADUs cannot exceed 24 feet or be taller than the primary residence.
• Architectural Compatibility: The exterior design and materials must complement the main home; metal facades are not allowed.
• Outdoor Space: A minimum of 360 square feet of private outdoor space must be provided, with at least 10 feet in each dimension.

Aurora permits Accessory Dwelling Units (ADUs) on now allowed on all residential lots that meet specific criteria. To qualify, properties must: 

• Contain one single-family detached home
• Be at least 6,000 square feet in size
• Have only one ADU per lot

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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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There are no known utility and infrastructure requirements in Aurora.

• 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.
• Aurora allows ADUs to be used for both long-term and short-term rentals.

Short-Term Rentals (Airbnb, VRBO, etc.) are permitted

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

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Navigating Aurora’s ADU zoning and permitting requirements can be complex, but we make the process simple. At Kindred Tiny Homes, we:

✔ Ensure your ADU meets all zoning and design standards
✔ Handle permitting, construction, and project management
✔ Create beautiful, high-quality ADUs that seamlessly blend with your property

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

Setbacks & Placement

• ADUs must comply with standard accessory structure setbacks.
• If the ADU is built above an existing garage, the setback can be no less than the garage’s current setback.
• Second-story windows must be positioned to maximize privacy for neighboring properties.