About Siboni Development & Design, ADU design-build in Los Angeles
Siboni Development & Design designs, permits and builds accessory dwelling units across Los Angeles. Turnkey ADUs engineered to last generations — one team from first site visit to final inspection.
Last updated:
Who is Siboni Development & Design?
SIBONI DEVELOPMENT & DESIGN INC is a California licensed general contractor based at 228 S McCadden Place, Los Angeles, CA 90004. Under the name Siboni Development & Design, it designs, permits and builds accessory dwelling units across Los Angeles, with one team from the first site visit to the final inspection.
Is Siboni Development & Design licensed and bonded?
Yes. The company holds California contractor license CSLB #1085971 with two classifications: B (General Building) and C10 (Electrical). It has been licensed in California for 4 years and carries a $25,000 contractor's bond. Specialty trades outside the B and C10 classifications are performed by licensed trade partners.
- Legal name
- SIBONI DEVELOPMENT & DESIGN INC
- License
- CSLB #1085971
- Classifications
- B — General Building · C10 — Electrical
- Licensed in California
- 4 years
- Contractor's bond
- $25,000
- Other trades
- Licensed trade partners
Where does the company build?
The studio is at 228 S McCadden Place, Los Angeles, open Mon–Sat, 7:00 AM – 7:00 PM. Projects are built across Los Angeles and the listed service areas: Hancock Park, Studio City, Sherman Oaks, Encino, Pasadena, Glendale, Burbank, Santa Monica, Culver City, Silver Lake, Highland Park, Long Beach, Irvine and San Diego.
Los Angeles, CA 90004Mon–Sat, 7:00 AM – 7:00 PM(317) 689-8585
[email protected]
- Los Angeles
- Hancock Park
- Studio City
- Sherman Oaks
- Encino
- Pasadena
- Glendale
- Burbank
- Santa Monica
- Culver City
- Silver Lake
- Highland Park
- Long Beach
- Irvine
- San Diego
How does a project run?
Five steps, one contract, one point of contact. We handle the site assessment and feasibility, design with 3D renderings of your exact backyard, the entire city permit process (average approval: 6 weeks), construction with a dedicated project manager and a weekly photo report, then turnkey delivery once the final inspection has passed.
- 01
Site Assessment & Feasibility
We visit, measure, check zoning, setbacks, utilities and give you a real number, not an estimate range.
- 02
Design
3D renderings of your exact backyard. You approve every material before we order anything.
- 03
Permits, handled
We manage the entire city process. Average approval: 6 weeks.
- 04
Construction
A dedicated project manager, a weekly photo report, a live schedule you can check anytime.
- 05
Turnkey Delivery
Move-in ready: appliances, finishes, landscaping, final inspection passed.
What goes into every build?
Five construction details set the standard: board-formed concrete foundations, kiln-dried framing lumber, a triple-sealed envelope air-tested before drywall, hidden LED eave lighting, and solid-core doors on ball-bearing hinges. Rebar spacing is tighter than code, because the slab is what everything else trusts.
- 01
Board-formed concrete
Foundations and plinths cast against rough-sawn cedar, so the wood grain lives in the concrete for a century. Rebar spacing is tighter than code because the slab is what everything else trusts.
- 02
Kiln-dried framing lumber
Every stud is kiln-dried and crowned by hand before it goes up. Green lumber twists as it dries; ours has already done its moving in the kiln, not in your walls.
- 03
Triple-sealed envelope
Fluid-applied membrane, taped sheathing seams and a rain-screen gap behind the cladding. Air-tested before drywall. It's why the house is silent and the utility bill is small.
- 04
Hidden LED eave lighting
A continuous 2700K channel routed into the soffit. No fixtures, no glare, no bugs: the roof simply glows a little at dusk.
- 05
Solid-core doors & hardware
Forty-five-pound doors on ball-bearing hinges with solid brass pulls. You feel it the first time you close one, and every time after.
Let's see what your backyard can become.
Free 45-minute site assessment. No pressure, real numbers.