Mulwood ADUs
ADU Builder in Mulwood, Calabasas
Mulwood sits on the eastern side of Calabasas, reached from Valley Circle Boulevard and Mulholland Highway, close to where the city meets Los Angeles. We help Mulwood owners sort out the right ADU and the right permit desk.
Mulwood Is in Calabasas, Not Los Angeles
Mulwood's location near the Woodland Hills line causes real confusion. Mailing addresses, school boundaries and even utility bills can make a parcel feel like part of the San Fernando Valley. For ADU purposes, what counts is the city limit. Mulwood is a City of Calabasas community, so its ADUs go through the Calabasas Planning Division and Building and Safety Division, not the Los Angeles Department of Building and Safety.
That difference changes the rulebook. Los Angeles has its own ADU ordinance and its own hillside provisions. Calabasas applies Municipal Code section 17.12.170 and the standards table in 17.11.170, under the ministerial review that state law requires. We confirm the parcel's jurisdiction from the assessor and city records before drafting anything, because a design built to the wrong code costs a full redesign.
Garage Conversion and Attached ADUs in Mulwood
Single-family homes in Mulwood generally have attached garages, which makes a conversion one of the first options we look at. The slab and roof are already in place, unit-size limits do not apply to converted space, and the City cannot ask you to replace the lost garage spaces. A two-car garage becomes a comfortable studio or compact one-bedroom.
Where the house has a side yard with some width, an attached ADU is another good fit. It shares one wall with the house but has its own entrance, kitchen and bath. On lots that slope toward the back, extending the existing pad sideways usually costs less than building a separate pad down the hill.
Hillside Edges and Fire Rules Around Mulwood
Mulholland Highway runs along hillside terrain, and some Mulwood lots back onto slopes and brush. Check where your parcel falls on the CAL FIRE map that the City published in 2025. A lot rated Very High needs wildland-urban interface construction for any new ADU, along with brush clearance that extends around the new building.
Slope also affects foundations. A detached unit placed toward the back of a sloping lot may need a soils report, deeper footings or a retaining wall. The City's table, quoted by HCD in 2026, keeps detached ADUs to one story and 16 feet, so a two-level unit stepping down the hill is not on the table for a freestanding building under current rules.
Utilities for a Mulwood ADU
Because Mulwood sits close to the boundary, owners sometimes assume LADWP serves them. Inside Calabasas, the water district is Las Virgenes Municipal, which also handles sewer, and the power company is Southern California Edison. We confirm the providers from your bills and plan connections accordingly.
Most Mulwood ADUs share the home's existing water service and sewer lateral. A camera inspection of the lateral and a panel load calculation are standard early steps, since a full second kitchen and a heat pump often push older electrical service to its limit.
ADU Options for Mulwood Homes
Mulwood Garage Conversion ADU
Turning the attached garage into a unit is often the most direct path. The structure exists, parking replacement is not required, and the yard stays as it is.
Attached ADU on the Side Yard
An addition along the side of the house keeps utilities close and builds on level ground. It suits Mulwood lots where the rear yard drops away.
Junior ADU for Family in Mulwood
A bedroom with its own bath and exterior door can be legalized as a JADU, capped at 500 square feet. It is a quick way to give a relative independence under the same roof.
Detached ADU on Flat Rear Yards
Where the backyard is level, a single-story cottage offers the most separation. Even a narrow yard can work, since a unit under 800 square feet may sit 4 feet from the back and side fences.
ADU services in Mulwood
ADU Services in Mulwood
FAQs
Mulwood ADU Questions
Do Los Angeles ADU rules apply in Mulwood?
No. Mulwood is inside the City of Calabasas, so Calabasas ADU rules and state law apply. The City of Los Angeles rules apply just across the line in Woodland Hills.
Who provides water and power for a Mulwood ADU?
Las Virgenes Municipal Water District provides water and sewer, and Southern California Edison provides electricity. Most ADUs connect through the main house's existing services.
How long does a Mulwood ADU permit take?
The City has 15 business days to confirm the application is complete and 60 days after that to decide. Correction rounds and any HOA review add time, so complete plans matter.
Can I build a two-story detached ADU in Mulwood?
Under the City's standards as quoted in 2026, detached ADUs are limited to one story and 16 feet. An attached ADU can go higher under state law. We check the current rule when design starts.
ADU consultation
Start a Mulwood ADU Project
Describe the house, the garage and how the lot slopes. One of us replies by phone or email inside 24 hours of your request.
- Design
- Permits
- Construction