Under California state law, local agencies like the City of Los Angeles are required to approve or deny an ADU building permit application within 60 days of receiving a completed application.

The LADBS Standard Plan Program features pre-approved ADU designs. Using these pre-vetted designs significantly speeds up the permitting process because structural details are already verified.

Yes. Units smaller than 750 square feet are typically exempt from paying Development Impact Fees, saving homeowners thousands of dollars in upfront soft costs.

It means neighbors cannot vote against your project. If your plans meet the city’s objective checklist, the city must approve them without public hearings.

Yes. Upon approval, the city will assign a unique address (often with a “1/2” identifier) to ensure mail and emergency service recognition.

No. Per current law, when a garage or carport is converted into an ADU, the owner is not required to provide replacement parking spaces.

Yes. L.A. permits Movable Tiny Houses as legal ADUs provided they are registered with the DMV and meet specific standards, such as skirting to hide wheels.

Multifamily owners can convert non-livable spaces (boiler rooms, storage, attics) into ADUs. You can typically add at least one unit, or up to 25% of the existing unit count.

Yes! Most single-family properties can legally accommodate one detached ADU and one Junior ADU (JADU) inside the existing home, effectively creating a triplex.

A JADU is a unit no more than 500 sq ft, created within the walls of a single-family home. It must have an exterior entrance and an efficiency kitchen.

In Los Angeles, a detached ADU can be as large as 1,200 square feet. However, it must fit within your lot’s floor area ratio (FAR) and coverage limits.

The minimum size for an ADU in L.A. is 150 square feet, which is the “Efficiency Unit” standard defined in the health and safety code.

Standard rules require a minimum of 4-foot side and rear yard setbacks for detached ADUs. Front setbacks are dictated by the primary residence’s zoning.

Detached ADUs are typically limited to 16–18 feet. Height may vary based on transit proximity and the existing primary residence’s height.

Newly constructed, detached ADUs require solar panels. Garage conversions and attached ADUs are generally exempt from this requirement under the Energy Code.

For ADUs permitted before 2025, there is no owner-occupancy requirement. JADUs, however, still require the owner to live in either the main house or the JADU.

AB 1033 allows cities to permit the separate sale of ADUs as independent condos. Local neighborhood ordinances in L.A. are currently evolving to adopt these provisions.

Sprinklers are only mandatory in the ADU if they are required in the primary residence. However, fire access requirements still apply if the unit is far from the street.

Yes. VHFSZ zones require extra fire-hardening standards and may have more rigid vehicle access requirements for emergency services.

While not strictly mandatory, sub-metering is highly recommended if you plan on renting the unit so that tenant usage can be billed accurately.