20+ years. 390+ LA remodels. Typical ADU project: 5–9 months from design kickoff through certificate of occupancy, including LADBS permit.
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.
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.
Need help spreading payments? We work with Enhancify financing — prequalification doesn't affect your credit.
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.
Not always. California allows ADUs to share utilities with the primary residence in many cases — especially helpful for cost. We assess your existing service and make a recommendation based on cost, code, and your plans for the unit (rental vs. family).
Yes — California state law specifically protects ADU rentals. Most LA jurisdictions allow standard long-term rentals. Short-term rental (Airbnb-style) rules vary by city — verify with your municipality before banking on it.
Highly variable. Rental income alone can cover the financed cost in 8–14 years in many LA neighborhoods. Property value typically increases by 20–30% of the build cost. The bigger benefit for many clients is flexibility — multi-generational housing, home office, or a future downsizing option.
Yes when the lot + design qualify. California's SB-9 (lot splits) and SB-684 (streamlined ADU review) unlock ministerial approval — no discretionary review, no neighbor-hearing risk, typically 60 days to permit. We design to the ministerial criteria (setbacks, height, parking waiver) up front where possible, so your project takes the fastest legal path.
Ministerial path (SB-9 / SB-684 compliant): 60 days to permit. Standard discretionary review: 4–8 weeks after complete plan submittal, plus 3–6 weeks of plan-check revision cycles. Non-conforming lots (hillside, coastal, HPOZ) add 6–12 weeks. We manage the LADBS submittal + response cycle end to end.
5.0 ★★★★★ · 47+ Google reviews · real names, real homes
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.
Practical guides on this topic.
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.
Read »When you need a permit for an LA kitchen remodel, how LADBS plan-check works, typical timelines, and how to avoid the common mistakes.
Read »Convert your garage into livable space — studio, office, guest suite, or ADU. Design and build under one roof. Permits handled. Licensed (CSLB #1133368).
Learn more »LA whole-home renovations — design, structural, kitchens, baths, finishes. End-to-end project management with one accountable team. Licensed CSLB #1133368.
Learn more »Onn personally reviews every inquiry. We'll set up an in-home consultation to walk through your vision, scope, and a realistic budget — no obligation.