Designing, permitting, and building detached ADUs, garage conversions, and Junior ADUs for Beverly Hills Flats, Trousdale Estates, and hillside estate lots. Beverly Hills Building & Safety permits handled in-house. CSLB License #972213.
Hillstar Construction is a licensed Beverly Hills ADU contractor. We've built detached ADUs, garage-conversion ADUs, above-garage units, and Junior ADUs (JADUs) across the Westside, with a focus on the specific realities a Beverly Hills project brings: the city's own Building & Safety permitting path, Hillside Area R1 standards on parcels north of Sunset, stricter construction-hour and noise rules than LA City, and Chapter 7A fire-zone compliance on the hillside lots where it applies.
Every project starts with a discreet on-site consultation, a clear written scope, and a straight answer about what your lot can actually support — delivered in the quiet, coordinated way a Beverly Hills project calls for.
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Beverly Hills ADUs are not LA City ADUs with a different return address. They touch the city's own zoning rules, Hillside Area R1 standards, stricter construction-hour and noise limits, dumpster and right-of-way permits, and — on the hillside parcels north of Sunset — Chapter 7A Wildland-Urban Interface standards. A contractor who defaults to the LA City playbook loses weeks at plan check when Beverly Hills rules apply differently.
Just as important: Beverly Hills projects demand a quiet, coordinated build. Neighbors are close, streets are visible, and a crew that shows up at 6:45 a.m. or parks the dumpster in the wrong place generates calls to Code Enforcement that stop the job. We run Beverly Hills projects the way the neighborhood expects — tight schedule, controlled staging, coordinated notification — and we hold the line on quality and finish standard the street will see.
When a detached ADU isn't the right answer for the lot — because of buildable envelope, hillside grading, or estate-planning considerations — a home addition or scoped whole-home remodel is sometimes the cleaner path.
ADU rules are set by California state law plus the City of Beverly Hills Municipal Code. The baseline rules below apply to virtually every Beverly Hills lot. The specific envelope on your property depends on zoning, Hillside Area R1 status, fire-zone classification, and existing structures — which is what the first site visit covers.
State law requires Beverly Hills to allow a detached ADU of at least 850 square feet for a studio or one-bedroom, or at least 1,000 square feet for two or more bedrooms. Larger envelopes are generally achievable on the larger Flats lots and on suitable hillside parcels, up to state-allowed maximums. The realistic size on your specific property is confirmed at the first site visit and at plan submittal.
State law limits required side and rear setbacks to no more than four feet for a new detached or attached ADU. No setback is required where you convert an existing garage to an ADU in its existing footprint.
Beverly Hills issues ADU permits through the City of Beverly Hills Community Development Department, Building & Safety Division — not LADBS. State law requires the city to determine application completeness within 15 business days and to approve or deny a complete ADU application within 60 days. We handle the Beverly Hills submittal, plan-check corrections, and required reviews end to end. The Los Angeles area permit guide explains the broader regional permit flow.
Sloped parcels north of Sunset Boulevard, including Trousdale Estates and adjacent hillside lots, are subject to Beverly Hills Hillside Area R1 standards — adding grading, height, and design provisions on top of the standard ADU rules. Hillside ADUs take longer to design and permit but remain buildable on most qualifying lots.
Where a Beverly Hills parcel falls within a Very High Fire Hazard Severity Zone — common on hillside parcels north of Sunset — the ADU must be built to Chapter 7A of the California Building Code: ignition-resistant siding and soffits, dual-pane tempered or multi-pane glazing, ember-resistant vents, a Class A roof assembly, and defensible-space compliance. These are code, not upgrades.
Beverly Hills enforces tighter construction-hour limits and noise rules than LA City. Dumpster placement, street staging, and portable-toilet siting require city permits, and after-hours work is enforced. We build the schedule around those limits from day one so the project does not get red-tagged.
Beverly Hills lots range from compact R1 parcels in the eastern Flats to wide Flats lots around Beverly Gardens and the larger estate lots on Trousdale and the hillside streets above Sunset. No single ADU configuration fits every property. Here's how we match ADU type to lot in practice:
The most common Beverly Hills configuration on wider Flats lots and on estate parcels with open yard. Works best where lot area, setbacks, and — on hillside lots — grading envelope support a standalone 800–1,200 square-foot structure. Offers the most design flexibility and the cleanest separation between main house and ADU, which matters for guest use, staff housing, or a studio office.
A strong option on Beverly Hills lots with detached garages that aren't carrying parking load, or where the existing garage structure is sound and well-placed. State law allows garage-to-ADU conversions with no required setback from the existing structure's footprint, which shortens permitting. We verify foundation, drainage, and structural condition before committing — older Beverly Hills garages sometimes need reinforcement to carry habitable-use loads.
Useful on tighter Flats parcels where yard space is limited but the garage footprint can carry a second-story habitable unit. Works within state setback and height rules, plus Hillside Area R1 design review where the parcel is hillside-classified.
A JADU is carved out of the existing primary home — up to 500 square feet — with its own entrance and efficiency kitchen. Often the right answer on Beverly Hills lots where a detached ADU isn't realistic due to buildable envelope, where the primary residence has unused staff quarters or pool-house volume, or where a whole-home remodeling project is already underway and a JADU fits within the reworked floor plan. JADUs continue to have owner-occupancy requirements under state law.
A realistic Beverly Hills ADU timeline from first site visit to certificate of occupancy is roughly 8 to 15 months. Hillside Area R1 review, Chapter 7A detailing where it applies, and the tighter construction-hour window add time versus a flat-lot build in a less restrictive city. Once permits are issued, construction typically runs 4 to 8 months for a detached build, a little shorter for a garage conversion.
Cost depends on ADU type, finishes, site conditions, hillside requirements, and Chapter 7A materials where applicable. Our cost and ROI guide for building an ADU in Los Angeles lays out the numbers. Beverly Hills projects generally sit at or above the top of those ranges — driven by finish level, hillside complexity, and the coordination, scheduling, and discretion a Beverly Hills build requires. What we commit to on every Beverly Hills project is a written scope, a clear price, no surprise change orders unless construction uncovers something that genuinely requires one, direct access to your project manager, and full coordination with your architect, interior designer, or landscape firm if you have one already engaged.
The full ADU construction process — site evaluation, design, permit submission, build, final inspection — is covered step-by-step in our construction guide.
Hillstar was great! We did a garage conversion and Lior was the best. He helped us plan every detail.
— Jeffrey Rhodes, January 2019Lior 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 2019Most Beverly Hills lots qualify. California state law (Government Code §65852.2) requires every California city to allow at least one ADU on single-family residential lots, and Beverly Hills is predominantly zoned R1 (single-family) in the Flats, with Hillside R1 north of Sunset Boulevard covering Trousdale Estates and adjacent hillside parcels. What changes per lot is the type and size of ADU that fits — not whether you can build one. We confirm exact zoning, setbacks, Hillside Area status, and fire-zone classification during the first site visit.
No. Beverly Hills is its own incorporated city and issues ADU permits through the City of Beverly Hills Community Development Department, Building & Safety Division — not LADBS. The state-law timelines apply: the city must determine application completeness within 15 business days and approve or deny a complete ADU application within 60 days. We handle the Beverly Hills submittal, plan-check corrections, and required reviews from the first drawing through final inspection.
It can, and on Trousdale Estates and other parcels north of Sunset it often does. Beverly Hills applies Hillside Area R1 standards to sloped lots — adding grading, height, and design provisions on top of standard ADU rules. These projects are more design-intensive than a flat-lot ADU in the Flats, but remain permittable. We check hillside classification before quoting scope so the numbers and timeline reflect reality.
Yes. Beverly Hills enforces tighter construction-hour limits and a stricter noise ordinance than the City of Los Angeles, and dumpster, street-use, and staging placements in the right-of-way require Beverly Hills permits. We coordinate the build schedule, crew arrival times, dumpster placement, and neighbor notification to stay compliant from day one — so the project does not get red-tagged for hours or noise complaints.
Yes — hillside parcels in Beverly Hills north of Sunset Boulevard, including portions of Trousdale Estates and properties toward Coldwater and Benedict Canyons, fall within a Very High Fire Hazard Severity Zone (VHFHSZ) and are treated as Wildland-Urban Interface (WUI) under Chapter 7A of the California Building Code. Where that applies, the ADU must be built with ignition-resistant exterior materials, dual-pane tempered or multi-pane glazing, ember-resistant vents, and a Class A roof assembly. We confirm your parcel's fire-zone classification at the first visit and build to Chapter 7A from the first drawing where required.
California state law requires Beverly Hills to allow a detached ADU of at least 850 square feet (studio or one-bedroom) or 1,000 square feet (two or more bedrooms). Larger envelopes are generally achievable on the larger Flats lots and on suitable hillside parcels, up to state-allowed maximums. The realistic size on your specific property depends on lot area, yard depth, existing structures, setbacks, and hillside grading — which we scope at the first site visit and confirm at plan submittal.
We also serve homeowners in communities near Beverly Hills — tap a nearby area for local details:
Studio City · Sherman Oaks · Encino · Pasadena · Los Angeles (citywide)
We handle more than one project type in Beverly Hills. Explore related services for your neighborhood:
