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Berkeley ADUs

Everything about building Accessory Dwelling Units in Berkeley, CA

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PLANNING OFFICE The city planning office is not open to the public at this time, but is accepting ADU permit questions and applications.

The city government of Berkeley has updated its local zoning codes to comply with the State ADU mandate.
The California Building Code (CBC) 2019 is adopted.
Relevant state bill updates for SB13, AB68, AB881, AB670 are shown in green below.

Last Updated 04/05/20



hintsights

City Hint: The city permitted a total of 80 ADU project(s) in the past year of 2018, which makes it above average for ADU production compared to other cities statewide.


Number of ADUs allowed:

According to state law, all single-family homes are allowed at least one Accessory Dwelling Unit. Additionally, single-family lots which are owner-occupied may create one Accessory Dwelling Unit and one Junior Accessort Dwelling Unit (JADU). Also, multi-family lots may now add one ADU per every four existing residential units, so long as they were legally established.

As of January 1st, 2020

Types of ADUs allowed:

Detached ADU, Attached ADU, Junior ADU are approved. ADUs may be new construction or converted from existing space. JADUs must be converted from existing space.

Lot size:

ADU projects on single family or multi-family residential lots will not be subject to the minimum lot size of the underlying local zoning code or by special ordinance. ~ AB68 & AB881 Update

As of January 1st, 2020

ADU size:

Single-family and multi-family Parcels will be permitted to construct up to 850 sq. ft. for a one bedroom ADU or up to 1,000 sq. ft. for a two bedroom ADU, regardless of the underlying zoning standards of the property. A Junior Accessort Dwelling Unit (JADU) up to 500 sq. ft. is permitted. The minimum size of any living unit (including ADUs and Junior Accessort Dwelling Unit (JADU)s) is 150 sq. ft. according to Califronia Residential Code. ~ According To AB68

As of January 1st, 2020

Setbacks:

The maximum required setback for a detached new construction Accessory Dwelling Unit shall be no more than 4 ft. from the rear and side property lines. Setbacks will not be required for Accessory Dwelling Units and Junior ADUs converted from existing space that was legally eastablished. Attached Accessory Dwelling Units and conversions from existing space to be expanded will be required to comply with the setbacks of the underlying zone. ~ AB68 & AB881 Update

As of January 1st, 2020

Parking:

Replacement parking shall not apply to parcels which convert an existing garage to an ADU or Junior Accessort Dwelling Unit (JADU). ~ AB68 & AB881 Update

As of January 1st, 2020

Fire Safety:

1. An ADU can only be allowed if the fire flow and water pressure to meet the minimum fire safety standards.
2. may be allowed on lots on streets that do not meet minimum fire safety standards.

Shape, materials and style:

Accessory structure should resemble primary dwelling in shape, style and materials used (walls, doors, windows and rooftop materials).

Height:

ADUs are allowed to be one 1 story.

Design review:

No design review is needed in permitting process.

Number of Bedrooms:

Not specified by State Standards.

Ownership

Owner-occupancy will not be required for new Accessory Dwelling Units (conversion and new construction) built between 2020 and 2025. ~ SB13

As of January 1st, 2020

Utility Connections

shall not be considered new residential uses for the purposed of calculating utility connection fees or capacity charges.

Permit Fees

SB13 Update: As of January 1st, 2020, local impact fees for ADUs will be reduced substantially statewide.

Entry

ADU entrance cannot be on front of primary dwelling unit and must be separate from primary dwelling unit entrance.

Allowed Zones

*** Beginning in 2020, according to state law, all residential zoning districts, including single-family and multi-family, are allowed to build Accessory Dwelling Units. ***

R‐1, R‐1A, R‐2, R‐2A, R‐3, R‐4, R‐5, R‐S, R‐SMU

As of January 1st, 2020

Open Space

New Comply with the coverage requirement of the district.
Existing* N/A

Lot Coverage

New Comply with the coverage requirement of the district.
Existing* N/A

Street Width

Street width must be greater than 26’. If greater than 20’ but less than 26’, then may be approved by an Administrative Use Permit (AUP).

Existing

* “Existing” applies to ADUs created from existing, legal dwellings, accessory structures or buildings with no change to building massing (building footprint and roof height do not change).

SB13 Update: Amnesty program to permit unpermitted units will be administered statewide, allowing non-health and safety code violations to be deferred.

Residential Building Code:

The California Building Code (CBC) 2019 is adopted.

Berkeley City Planning Offices
Permitting

Berkeley Planning & Zoning Office

2118 Milvia St., Berkeley, CA Berkeley, CA 94704

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APPRECIATION ESTIMATE

* upon completion of ADU

CONSTRUCTION COST ESTIMATE

* based on local average price per sqft

RENTAL ESTIMATE

* estimated by location

MORTGAGE ESTIMATE

* 30 years / 5% interest rate / 20% down payment

SELECT ADU SIZE & TYPE

Size: 500 sqft

BASED ON LOCAL AVERAGE PROPERTY DATA & VALUE

Appreciation Estimate = (Base Value: $) / (Home's Living Space: sqft) * (ADU's Living Space: sqft)

Rental Estimate = (Rent Per Sqft: $4.57) * (ADU's Living Space: sqft)




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USE ADU SERVICES
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Use our ADU Property & Design Reports as a starting point to plan your ADU project. Our experts will do the legwork with your city or county planning office and design custom ADU concepts for your property and your needs.

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Getting your designs ready for city permitting and construction can speed up your ADU project and reduce unforseen costs later on in the process.

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