“Lior is very personable and has many decades of construction experience. We appreciated his sincere evaluation of our project.”
Ann AnterasianHouzz · April 2019
ADU construction · West Hills, CA
ADU Contractor in West Hills, CA
Detached, attached, garage-conversion and junior ADUs for West Hills homes between Roscoe Boulevard and the Simi Hills — designed, permitted through LADBS, and built by a licensed general contractor based minutes away in Woodland Hills. Hillstar Construction Inc, CSLB #972213.
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CSLB LicensedLicense #972213
5.0 on Houzz17 verified reviews
Family-OwnedServing Los Angeles since 2010
24-Hour ResponseFree in-home estimate
West Hills PermitsLADBS · City of Los Angeles
Why Hillstar
What a West Hills ADU Gets From Hillstar
West Hills is a primarily single-family neighborhood at the western edge of the San Fernando Valley, with the Simi Hills on its south and southwest. The flat blocks favor conversions and detached units; the hill-edge parcels need a more careful plan.
Minutes From Our Base
Hillstar Construction Inc is based on Ventura Boulevard in Woodland Hills, next door to West Hills. Site visits, deliveries and inspection days stay predictable on a project this close.
Attached-Garage Conversions
Many West Hills homes carry an attached garage. Converting one means fire-rated separation from the house, new electrical and plumbing routing, and insulation to current energy standards — scope we name before we quote.
Hill-Edge Planning
Parcels against the Simi Hills can fall inside the City’s hillside rules and mapped fire hazard severity zones. We confirm both on the official maps at the first visit and design to what applies.
LADBS Process, Owned
West Hills sits in the City of Los Angeles, so the ADU permit is an LADBS permit. We prepare the plans, submit them, answer plan-check corrections and meet every inspection.
Designed for Your Use
Rental income potential, a home for a parent or an adult child, or a separate workspace — we design the unit around the use, from layout to finish level.
One Contract, Licensed Trades
Hillstar Construction Inc holds the prime contract. Our crew does the foundation, framing, drywall and finish work; electrical, plumbing and HVAC go to appropriately licensed specialty contractors we oversee.
Our process
A West Hills ADU in Four Steps
From the first walk of the yard to the final LADBS inspection.
1
Walk the Lot
We measure the yard, look at the garage, panel and sewer line, and check where the parcel sits relative to the hillside and fire-zone maps.
2
Design & LADBS Submittal
Plans, structural engineering and Title 24 energy documentation, then the LADBS submittal. Our team typically files Valley plans at LADBS’s Van Nuys office, as a matter of our own practice.
3
Build
Foundation, framing, drywall and finishes by our crew; electrical, plumbing and HVAC by appropriately licensed specialty contractors we oversee. We schedule and meet every inspection.
4
Hand Over
Final inspection, walkthrough, punch list and Hillstar Construction Inc’s written workmanship warranty.
Local conditions
Permits, Lots & What’s Specific to West Hills
The City’s community plan describes West Hills as a primarily single-family neighborhood bounded by Roscoe Boulevard to the north, Topanga Canyon Boulevard on the east, the Ventura Freeway to the south and the Simi Hills on the south and southwest. Here is what that geography means for an ADU.
Permit jurisdiction
West Hills is a community of the City of Los Angeles, so an ADU permit here is an LADBS permit — plan check, electrical, plumbing, mechanical and final inspection. LADBS describes an ADU as a small, separate living space on the same property as a single-family home that can be attached to the main house or a separate structure such as a converted garage or backyard cottage, and it runs a Standard Plan Program that shortens plan check for pre-approved ADU designs. We confirm at the site visit whether a standard plan or a custom design fits your lot.
Lot & housing patterns
The flat blocks between Roscoe Boulevard and the freeway are single-family homes, most with an attached or detached garage and a usable rear yard. That gives two realistic paths: a detached unit in the yard, or a conversion of the existing garage. State ADU law caps required side and rear setbacks at four feet for a new unit and requires no setback for an existing garage or accessory structure converted in place, and it does not let the City require replacement parking when a garage is converted for an ADU.
Overlays you may see here
Toward the Simi Hills, a parcel can sit inside the City’s designated Hillside Areas, where the LA Baseline Hillside Ordinance adds height, grading, cut-and-fill and export-dirt standards to exterior-footprint work, and inside a mapped Very High Fire Hazard Severity Zone, where ignition-resistant construction standards apply to new construction and to alterations, additions and relocated buildings alike. Both are parcel-specific, so we confirm them on the official maps at the first site visit rather than assuming from a neighbor’s street.
Our work
Hillstar ADU Work
Real Hillstar Construction Inc projects, finished and in progress. Photographs are from Hillstar jobsites in the Los Angeles area; the finish level and design on your West Hills lot are set with you at the consultation.
Reviews
Homeowners on Working With Hillstar
Verified Houzz reviews from Hillstar Construction Inc clients.
“Hillstar was great! We did a garage conversion and Lior was the best. He helped us plan every detail.”
Jeffrey RhodesHouzz · 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 ChristineHouzz · February 2019
5.0 · 17 verified reviews on Houzz
FAQ
West Hills ADU — FAQ
Lot fit, attached garages, the LADBS process, the hill edge, solar, and renting.
Does my West Hills lot qualify for an ADU?
Most single-family lots do. State law requires an ADU permit application to be considered ministerially, without discretionary review or a hearing, and the permitting agency must approve or deny a complete application within 60 days when there is an existing home on the lot. What changes lot to lot is which type fits, and we confirm that at the first site visit.
Can I convert an attached garage in West Hills?
Usually, yes. Because the conversion stays inside the existing footprint, state law requires no setback for it and the City cannot require you to replace the parking you lose. An attached garage does need fire-rated separation between the new living space and the main house, plus electrical, plumbing and HVAC routing through or around the connection, and insulation brought up to current energy standards. We scope all of that at the site visit.
Who issues the permit for a West Hills ADU?
The Los Angeles Department of Building and Safety. West Hills is in the City of Los Angeles, so the permit is an LADBS permit. Hillstar Construction Inc prepares the submittal, responds to plan-check corrections and coordinates the inspections, and our team typically files Valley plans at LADBS’s Van Nuys office as a matter of our own practice.
My lot backs onto the hills. Does that change the project?
It can. A parcel inside the City’s designated Hillside Areas takes the LA Baseline Hillside Ordinance’s height, grading and export-dirt standards, and a parcel inside a mapped Very High Fire Hazard Severity Zone takes ignition-resistant construction standards. Neither stops an ADU; both make it an engineered project with more review, and we plan for that from the first visit after checking the official maps for your address.
Will my West Hills ADU need solar panels?
LADBS states that detached ADUs built from scratch must have solar panels. A garage conversion inside the existing footprint is a different permit category, so we confirm which energy requirements apply to your specific project during design rather than assuming.
Can I rent out a West Hills ADU?
State law does not allow a local agency to impose an owner-occupant requirement on an ADU, although a local agency may require that the unit be rented for terms of 30 days or longer. Junior ADUs are different: owner-occupancy is required when the JADU shares sanitation facilities with the main house. We walk through the rules for your unit type at the consultation.
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About Hillstar
A licensed Los Angeles general contractor.
Hillstar Construction Inc is a family-owned, licensed general contractor (CSLB #972213) serving Los Angeles since 2010, led by founder Lior Mazor, who brings over 40 years of hands-on construction experience. Licensed since 2012. WC Insured. The owner attends every estimate and stays involved through the build.
Plan a West Hills ADU With Us
Free in-home feasibility visit — lot walk, garage check, map check, and a written recommendation.