Kitchens and Bathrooms for Westlake Village ADUs

Planning an ADU Kitchen for a Small Westlake Unit

Every ADU needs a kitchen, and how much kitchen depends on who will live there. A long-term tenant usually expects a full-size refrigerator, a range, a dishwasher and enough counter to cook real meals. A parent who eats some meals in the main house may be fine with a smaller layout. A junior ADU only requires an efficiency kitchen: a cooking appliance plus counter space for food prep and some storage.

In a unit of 500 to 800 square feet, a single-wall or galley kitchen along one side of the main room keeps the floor open. Adding a peninsula gives prep space and a place to eat without a separate table. Twenty-four inch appliances save space without feeling cramped. We plan cabinet heights and clearances for the person using the kitchen, including someone who may later need to cook seated.

All-Electric ADU Kitchens and Panel Capacity

Many Westlake owners choose all-electric ADUs. An induction cooktop, a heat pump water heater and a ductless heat pump avoid running a new gas line to the unit and keep the systems simple. The tradeoff is electrical load. Induction ranges and water heaters draw significant current, and in older homes they can push the existing service past its capacity.

We run a load calculation during design. Depending on the result, the ADU may be fed from a subpanel, the main service may need an upgrade through Southern California Edison, or the unit may get its own service. Choosing appliances with that in mind, such as a smaller induction cooktop or a lower-draw water heater, can sometimes avoid an upgrade altogether.

ADU Bathroom Layouts That Work Long Term

Most ADU bathrooms are compact three-piece rooms: toilet, vanity and shower. In a unit meant for an aging parent, a curbless shower with a linear drain, a bench, grab bar blocking in the walls and a wider door make the room usable for decades. In a rental, durable tile, a solid vanity top and good ventilation reduce maintenance.

Ventilation is easy to overlook in a small unit. A properly sized exhaust fan, ducted to the outside, keeps moisture out of walls and ceilings. Where the bathroom backs onto the kitchen, we share a plumbing wall to shorten drain and supply runs.

• Curbless or low-threshold showers for accessibility
• Blocking for future grab bars
• Ducted exhaust fans sized for the room
• Plumbing walls shared with the kitchen where possible

Plumbing a Kitchen and Bath Into a Westlake ADU

Drain lines need slope, and the new fixtures have to reach the house sewer lateral or the City main by gravity whenever possible. In a garage conversion, that usually means cutting trenches in the slab. In a detached unit at the back of a sloped lot, it may mean an ejector pump. On the Los Angeles County side, the house lateral is the owner's responsibility up to the City main, so we check its condition before tying in new fixtures.

Hot water is the other decision. A dedicated water heater in the ADU gives the occupant control and avoids long waits for hot water from the main house. Tankless electric units save closet space but draw heavily, while a compact heat pump water heater needs a small closet with airflow. We pick the type that fits both the floor plan and the electrical budget. In Hidden Valley and other properties on wells and septic, fixture choices and water use also feed into the septic sizing review by Ventura County.