West Hills ADU Construction and Plan Check
West Hills ADU construction, from a single-story cottage to a unit over a garage: what LADBS plan check reads for each of the four ADU types.
Stacking an ADU over a new garage in West Hills sends the LADBS reviewer straight to the height figures and the stair. A two-story detached unit has to fit the height the city allows at its setbacks, and the stair has to land inside the lot. Keeping to one story, attaching to the house, converting the garage or carving out a JADU each raise a different set of questions, and we prepare the set for the one you choose.
What plan check reads for each type
For a detached unit, the reviewer checks the distance to the side and rear lines, which state law caps at 4 feet for new construction, along with the separation from the main house. For an attached unit, its size against the main house and the fire separation at the shared wall come first. With a garage conversion, the old structure's permit record and its ability to carry a new use get the attention. A JADU is reviewed for the separate entry, the efficiency kitchen and the door that closes it off from the rest of the house.
Utilities in the set
The reviewer also wants to see how power, water and sewer reach the unit. Our drawings trace the feeder from the main panel, the sewer tie-in and the water branch, all sized from a load calculation and a camera check of the house sewer. A unit with an upper floor also shows its stair and landing clearances. Once plan check signs off, LADBS issues the permit, and inspections run through the build from footings to finish. The city's final approval marks the moment the West Hills ADU can be occupied.
ADU Construction in West Hills: common questions
A lot with depth behind the house can hold a detached unit, single or two-story. If the garage tests sound, converting it is a direct path. An attached unit works where a rear wall faces open yard, and a JADU takes over a room the house already has. Each gets sketched on your parcel before you settle on one.
West Hills sits within the City of Los Angeles, and LADBS checks its ADU plans. We lead the submission with a site plan showing setbacks and the main house, and add a structural sheet when the unit goes to two stories. Each correction gets a written response until the permit issues.
California took that decision away from cities: a garage turned into an ADU owes no replacement parking, and Los Angeles applies the rule. The garage still has to meet code once converted, so we look at its permits, slab and framing before the plans go in.
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