Serving 90077 and Beverly Hills, Brentwood, Holmby Hills
California's ADU laws have made backyard units one of the highest-leverage property improvements an LA homeowner can make. We design and build all three types — detached new builds, attached additions, and JADUs (Junior ADUs converted from existing space). End to end. Permits, plans, foundations, framing, finishes, and final inspections, all under one roof. You work directly with Onn from feasibility study through certificate of occupancy.
Every neighborhood has its own architectural character, permit jurisdiction, and finish-level expectations. Here's how we approach adu construction in Bel Air specifically.
Many Bel Air homes sit on caissons or stepped foundations on slopes. Structural changes require careful engineering review. We bring in licensed structural engineers early — never as an afterthought.
Narrow private roads, gated entrances, and limited staging area mean material deliveries get scheduled around access windows. We plan logistics into the timeline, not bolted on.
Many Bel Air clients have long-standing relationships with architects, landscape designers, AV integrators, and security firms. We integrate with whoever you have — we don't insist on bringing our own team if yours is in place.
A meaningful share of Bel Air ADU projects involve parcels with grade, which means the standard ADU plan check is layered with hillside-review considerations: soils report, grading and drainage plan, and structural calculations for the slope condition. The combination adds to both the document package and the review cycle relative to a flat-lot ADU elsewhere in LA. We design the ADU footprint to minimize cut/fill where the parcel allows, which keeps the soils and grading scope narrower and the timeline tighter than it would be otherwise.
The typical Bel Air ADU brief is adult-child residency, in-law housing, or staff quarters rather than open-market rental income. That shapes the program: full kitchen instead of kitchenette, primary-bed-and-bath configuration rather than studio layout, and finish-tier matching the main house rather than a rental-grade build-out. Budgets scale to that program — the right way to think about a Bel Air ADU is as an extension of the main residence at main-house finish quality, not as a standalone rental unit.
Bel Air R-1 parcels enforce standard setback rules, and parcels with slope easements add additional setback considerations. State ADU law preempts many local restrictions, but height limits, septic setbacks where applicable, and (on certain parcels) design-review considerations can still apply. We design the ADU placement against the parcel's real survey, not the assessor's parcel sketch, so the design doesn't need to be reworked once the survey constraints are confirmed.
Lot review, setbacks, height limits, utility access, soil assessment. We tell you up front whether your project pencils — square footage, code constraints, expected timeline.
Floor plans, elevations, 3D renderings. We design to maximize functional space within California's ADU size limits (up to 1,200 sq ft detached, 850 sq ft for studios/1-bedroom).
Plan check submission, energy compliance (Title 24), structural engineering, separate or shared utility service. We deal with LADBS or your municipal building department.
New foundations or attached construction, framing, mechanical/electrical/plumbing (MEP) rough-in, exterior, and full interior finishes — kitchen, bath, flooring, HVAC, electrical.
Final inspections, Certificate of Occupancy, and walkthrough. We hand you a unit you can live in, rent, or use as a guest house.
Typical detached ADU build cost in Los Angeles, all-in (design, permits, construction, finishes, utility hookups). Attached ADUs typically run lower; JADUs converting existing space lower still.
LA Department of Building and Safety (LADBS) handles Bel Air permits. Hillside-zone properties trigger additional grading review and slope-stability requirements. Plan check timelines: 6–12 weeks for kitchens, longer for hillside structural work.
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I was nervous at first, but the team at Design Onn Point was extremely communicative and made me feel comfortable. They arrived on time each day, kept me updated, and answered all my questions. The crew was professional,…
Design Onn Point turned my kitchen into a beautiful space. The professional was knowledgeable, polite and kept everything on schedule. I love the modern kitchen layout and the quality of the custom kitchen cabinets. High…
Design Onn Point was a delight from start to finish. The team was incredibly communicative, always answering my questions quickly and keeping me in the loop. They were punctual, showing up on time every day, and their pr…
Free consult, no obligation. Onn personally reviews every inquiry — usually replies within 1 business day.
California state law allows detached ADUs up to 1,200 sq ft (or larger if your local jurisdiction permits). Attached ADUs are limited to 50% of the primary home's square footage or 1,200 sq ft, whichever is less. Junior ADUs (JADUs) are capped at 500 sq ft and must be inside the existing primary structure.
Plan to design and build a detached ADU in 9–14 months total: 2–3 months for design and permits, 6–10 months for construction. Attached ADUs and JADU conversions can run shorter.
Yes. We've done full-home projects in that range and approach them with project management appropriate to the scale — multiple subcontractors running in parallel, weekly milestone reporting, and a single accountable PM (Onn).
Absolutely. Many clients come to us with plans already drawn. We pick up at construction documents, run the build phase, and coordinate inspections.
Side-by-side comparison of detached ADUs and garage conversions for LA homeowners — costs, timelines, ROI, rental income, and which one adds more value on resale.
When you need a permit for an LA kitchen remodel, how LADBS plan-check works, typical timelines, and how to avoid the common mistakes.
Onn personally reviews every inquiry. Tell us about your project — Onn will be in touch within one business day.