Global Announcement Text

Berkeley, California: ADU Regulations

Date Updated:

11.24.2020

Zoning:

All residential, except in ES-R, M, MM, MU-U, U and on a lot with frontage on a roadway with less than 26’ in pavement width in the Hillside Overlay (H)

Types of ADUs allowed:

Junior ADU
Single-family ADU: Conversion, Detached, Attached
Multifamily ADU: Conversion, Detached

Stories:

Must comply with district height/story requirements

Lot size:

No minimum requirements.

ADU size:

Junior: 500 SF
Conversion: 850 SF for studio and 1 bedroom, 1,000 for 2+ bedrooms
Detached: 1,200 SF
Attached: No more than 50% of FA of existing or proposed primary unit

Lot coverage:

Must comply with the open space requirements of underlying district. ADUs created without massing modification to existing legal accessory structures or buildings (no change in building footprint or roof height) are not subject to open space and lot coverage requirements.

Bedroom:

No minimum requirements.

Storage:

No minimum requirements.

Kitchen:

Junior: Efficiency kitchen required
Single/Multifamily: Full kitchen required.

Bathroom:

Must provide separate sanitation facilities.
Note: Drainage and sewer connections should be assessed on a project by project basis.

Parking:

If ADU creation removes off-street parking for primary dwelling unit, replacement parking is required. No additional off-street parking is required for ADUs.

Setbacks:

4' rear and side yard setbacks required for detached
Note: Fire Department regulations should be assessed on a project by project basis.

Height:

16' max

Location:

ADUs are not allowed in front yard setback.

Rear Yard Coverage:

Must comply with the open space requirements of underlying district. ADUs created without massing modification to existing legal accessory structures or buildings (no change in building footprint or roof height) are not subject to open space and lot coverage requirement.

Design review:

No design review is necessary for an ADU permit.

Note: Historic Neighborhoods or Districts should be assessed on a project by project basis.

Owner Occupancy:

Through 2025, property owner is not required to occupy either the primary dwelling unit or the ADU. JADU requires owner occupancy.

Entryways:

Junior ADUs and Single Family ADUs require exterior entrance. Multifamily ADUs require an independent entrance.

Utility Connections:

ADUs are not considered new residential uses for the purposed utility connection fees or capacity charges.

Source Code:

Important Note: Rules and regulations are updated and changed frequently. It’s one of our jobs to be up to speed and navigate those regulations. Let us know if our website isn’t up to date or if you have any information that could help. Cheers!