ADU builder
Westlake Village.

ADU permitting in Westlake Village depends on whether the address falls on the LA County or Ventura County side. Foundations, garage slab reinforcement, and utility trenching have to account for lake-adjacent soils, planned communities, and hillside estate pads. Plan check runs through City of Westlake Village and LA County Building and Safety, depending on your address, with Title 24 energy compliance and structural review on every permitted unit. Garage conversions often move faster than detached new-builds because the shell exists; hillside lots, tight side yards, and long utility runs can still add foundation and MEP cost. Most ADU construction in Westlake Village lands in the $115,000-$330,000 range — garage conversions from $105k–$170k, detached units from $220k–$340k. Permit fees, utility connections, soils reports, and design are quoted separately by line item. Finish level, fire sprinklers, and separate utility meters are the usual cost drivers after site conditions. North Ranch, Three Springs, and guard-gated communities often require HOA approval. We coordinate HOA/ARC packets — exterior materials, parking replacement, access plans — in parallel with city submittals when they apply. We already build in your backyard. Here's what we handle for Westlake Village homeowners.

We build pools and ADUs on the same lots across Southern California. When both are planned together, shared excavation, grading, and utility trenching often saves 10–15% versus separate projects.