Torrance Rewrote Its ADU Rules In 2025.
In September 2024, the California Department of Housing and Community Development formally found that Torrance's 2022 ADU ordinance failed to comply with state ADU law on several points, including limiting single-family lots to one ADU and imposing extra JADU design standards. The city responded with Ordinance No. 3954, adopted in August 2025, which rebuilt Section 92.2.10 of the Torrance Municipal Code around Government Code Sections 66310 through 66339.
The practical upshot for homeowners is good: ADUs and JADUs are now permitted on any residentially zoned or mixed-use lot with an existing or proposed dwelling, review is ministerial with no public hearing, and an ADU does not count against your lot's allowable density. One standing restriction to know up front: ADUs and JADUs in Torrance cannot be rented for periods under 30 days, so short-term rental income is off the table.
Size, Setbacks, And Height Limits.
Under Torrance's local standards, an attached or detached ADU can be up to 1,000 square feet, and a JADU tops out at 500 square feet. State law also guarantees a streamlined path for one detached new-construction ADU of up to 800 square feet with 4-foot side and rear setbacks and at least 16 feet of height, which the ordinance approves ministerially regardless of other local limits. Detached ADUs built to the full local standard need a 15-foot front yard setback and 6 feet of separation between buildings, while conversions of existing structures are exempt from setback requirements.
Heights are more generous than many neighboring cities: citywide, a detached ADU can reach 18 feet for one story or 23 feet for two stories, and an attached ADU can go to 25 feet for two stories. In the Hillside Overlay and Coastal Zone, detached units are held to 16 feet unless state law allows more. One Torrance quirk to plan around: the code also caps interior height at 12 feet for a one-story unit, and design standards prohibit roof decks, new balconies, and decks more than 2 feet above grade. Not sure how your lot measures up? Check your lot and we will map the rules onto your actual parcel.
How Many Units Your Lot Allows.
On a single-family lot, Torrance permits one ADU plus one JADU. The state-mandated combinations are written directly into the ordinance: you can convert existing space in your home or an accessory building into an ADU, add a JADU inside the house, and still qualify for the 800-square-foot detached new-construction unit path, all approved without discretionary review.
Multifamily properties get real capacity. Owners can convert up to 25 percent of existing unit count into ADUs from non-livable space like storage rooms, garages, and basements (minimum of one), and can also add detached ADUs: up to two on a lot with a proposed multifamily building, or up to eight on a lot with an existing one, capped at the number of existing units, at up to 800 square feet each. If you own apartments or manage a portfolio in the South Bay, see how Abodu handles multifamily ADU projects at scale.
Permits, Parking, And Local Quirks.
ADU applications in Torrance are processed as building permits through the Community Development Department, and the ordinance commits the city to completing plan review, permit processing, and a full corrections list within the 60-day timeframe required by state law. The city's Planning Division ADU page is the official starting point, and the Building and Safety Division also runs a pre-approved ADU plans program.
Parking is one space per ADU, which can be uncovered or tandem on your driveway, and it is waived entirely if you are within a half mile walking distance of public transit, converting existing space, in a historic district, or near a car-share vehicle, among other exemptions. Local details worth knowing: only one curb cut per street frontage is allowed, a demolition permit for a detached garage being replaced by an ADU must be issued at the same time as the ADU permit, and properties in the Coastal Zone must file a Coastal Commission permit approval with the building permit application. Abodu's team handles all of this paperwork as part of every project, which is a big reason homeowners rate the experience so highly.
What It Actually Costs.
Custom site-built ADUs in California routinely exceed $250,000 before change orders, and that number has a habit of growing once contractors hit surprises in the yard. Abodu works differently: transparent published pricing: homes from $234,800 plus a published installation price, an expected all-in from $298,800, covering design, permits, factory build, delivery, and installation, so the number you sign is the number you pay.
Because your Abodu is built in a factory while Torrance reviews your permit on the state's 60-day clock, the timeline compresses dramatically compared to a stick-built project. See how the process works.