Under state law, each single-family home may now construct at least one Accessory Dwelling Unit (ADU). Owner occupied single-family lots may construct one Accessory Dwelling Unit (ADU) and one Junior ADU. Multi-family lots, per every four existing residential units, may construct one Accessory Dwelling Unit (ADU), so long as the existing units were legally established.

Residential parcels will not be subject to any minimum lot size for Accessory Dwelling Units by ordinance or of the underlying zoning district. ~ According To AB68

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

A detached unit less than 800 sq ft, with 4 foot setbacks and no taller than 16 feet shall be subject to only a building permit, no ADU permit.

Setbacks for a detached new construction Accessory Dwelling Unit (ADU) shall be no more than 4 ft. from the rear and side lot lines. No setbacks shall be required for Accessory Dwelling Unit (ADU)s and Junior Accessory Dwelling Units converted from legally eastablished existing space. Attached new construction Accessory Dwelling Unit (ADU)s and conversions from existing space to be expanded must comply with the setbacks of the underlying zone. ~ AB68 & AB881 Update

A detached unit less than 800 sq ft, with 4 foot setbacks and no taller than 16 feet shall be subject to only a building permit, no ADU permit.

Replacement parking shall not apply to lots which convert an existing garage to an Accessory Dwelling Unit (ADU) or JADU. ~ Updated: State Law AB-68

In General, an ADU that is within 1/2 mile of public transportation shall not be required to provide additional parking.

Accessory dwelling units shall not be required to provide fire sprinklers unless they are also required for the primary dwelling. ~ State Standards

Specific design styles and restrictions are not specified under State Standards. Passageways shall not be required in conjunction with the construction of an accessory dwelling unit. ~ State Standards

The maximum height of an ADU is not specified in the state standards. If ADU maximum height is not established locally, the height limitations of the underlying zone shall apply. ~ State Standards

A detached unit less than 800 sq ft, with 4 foot setbacks and no taller than 16 feet shall be subject to only a building permit, no ADU permit.

The municipality shall provide a ministerial review process which is not based on a discretionary approval for an ADU. The process shall take no less than 120 days. Valid applications submitted for ADUs, if not approved or denied within 120 days from submission, shall be considered approved. ~ State Standards

No maximum number of bedrooms is established other than that implied by the maximum size of an ADU allowed. ~ State Standards

Owner-occupancy will not be required for new ADUs (conversion and new construction) built between 2020 and 2025. ~ Updated: State Law SB-13

Connection and utility fees shall be reasonable, and shall not be disproportionately higher than those to develop primary dwellings, so as not to deter the development of ADUs. If a private sewage disposal system is used, such as a septic system, review and approval by a local health officer may be required. ~ State Standards

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