Build Your ADU in Los Angeles
Design, permits, and full build — one licensed LA team. Most projects complete in 3–6 months. Free on-site consultation, 24-hour response.
Every Type of ADU
The right ADU depends on your lot size, setbacks, and how you plan to use the space. We build all four common configurations.
Detached ADU
A standalone unit in the backyard, fully separate from the main home. Most flexible when lot space allows.
Attached ADU
An addition that shares a wall with the existing house, usually off the side or rear of the main structure.
Garage Conversion
Turn an existing attached or detached garage into a livable unit — typically the most cost-effective path.
Above-Garage ADU
A second-story unit added on top of an existing garage. A strong option when the lot footprint is tight.
Your ADU Build in 4 Steps
A straight path from first site visit to final inspection.
Free Consultation
We visit your lot, review setbacks, utilities, and access, and talk through what's realistic for your property.
Design & Permits
Architectural plans and engineering, then full submission to the city — through plan check to approval.
Full Build
Foundation, framing, MEP, drywall, kitchen, bathroom, finishes — our in-house crew stays on your job.
Final Inspection
We coordinate the final city inspections and sign-off, then walk the finished ADU with you.
Why Homeowners Choose Hillstar
LA Permits, Handled
Plan submission through final inspection. We coordinate with city inspectors — you don't touch the paperwork.
Design + Build, One Team
Architectural plans, engineering, and construction under one roof. No handoffs, no lost details.
Core Trades In-House
Foundation, framing, electrical, plumbing, HVAC, drywall, and finish — our own crew, not subcontracted.
3–6 Months On Site
Most ADU builds complete in 3 to 6 months once construction begins. Clear schedule from day one.
What Homeowners Say
Real 5-star Houzz reviews from Hillstar ADU and guest-house clients.
"Hillstar was great! We did a garage conversion and Lior was the best. He helped us plan every detail."
— Jeffrey Rhodes, January 2019"Lior was such a pleasure to work with for our guest house remodel. He was so easy to get in touch with, incredibly responsive and finished the job early."
— Amy Christine, February 2019"Lior and his team were extremely courteous, prompt, and worked hard to make sure every element was exactly what we were looking for."
— Ian, October 2022★★★★★ 5.0 · 17 reviews on Houzz
ADU Questions, Answered
How long does an ADU project take in Los Angeles?
Timelines vary by project and by how quickly permits move through the city. Most ADU builds we work on complete in about 3 to 6 months once construction begins. We provide a clear schedule at the consultation so you know what to expect at each phase.
Do you handle permits and inspections?
Yes. We handle the full Los Angeles permit process from plan submission through final inspection, and we coordinate directly with city inspectors at every stage. Homeowners don't have to deal with any of the paperwork or back-and-forth with the city.
What types of ADUs can I build on my property?
That depends on your lot size, setbacks, and existing structures. Detached, attached, garage conversion, and above-garage ADUs are all common options in Los Angeles, and we walk through which ones are realistic for your specific property during the first site visit.
What neighborhoods do you serve for ADU construction?
We work with homeowners across the greater Los Angeles area, with a focus on the San Fernando Valley and the Westside. That includes Woodland Hills, Encino, Sherman Oaks, Tarzana, Studio City, Beverly Hills, Bel Air, and West Hollywood, among others. If you're nearby and not sure whether we cover your area, give us a call.
Ready to Start Your ADU?
Free on-site consultation and estimate. Licensed & insured · CSLB #972213.