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Ridgeline Western Construction
Framing • Additions • New Construction • Remodeling • Residential • Commercial
Accessory Dwelling Unit General Contractor in Calabasas, CA
Accessory dwelling units are secondary living spaces built alongside a primary residence in Calabasas; Ridgeline Western Construction handles ADU projects with structural-first construction, coordinating framing, foundation, wall changes, and all licensed sub-trades as a single contract.
What We Build For ADUs in Calabasas
Ridgeline Western Construction handles structural framing and carpentry for ADUs in Calabasas, including detached builds, attached additions, and garage or interior conversions. We handle all tie-ins to the existing house—framing new walls, integrating roof lines, opening up or reinforcing where old meets new, and reading every load path so beam sizes, posts, and headers fit the new occupancy and pass inspection. For garage ADUs in Calabasas, we regularly find underbuilt walls or floor slabs, which get rebuilt or upgraded to support habitable use, along with insulation and required fire separation.
All licensed plumbing, electrical, and HVAC subcontractors are scheduled directly by us under a single contract, so every phase of the ADU is managed as one Calabasas project. Framing, rough-ins, and inspections are sequenced to move in order, avoiding delays caused by missing trades. Roofing is run through our dedicated licensed roofing partner, but the support structure and sheathing underneath is always managed by us.
Local building departments in Calabasas handle ADU plan checks, permits, inspections, and Title 24 energy rules. We coordinate from submittal to inspection closeout, and work through city utility departments where new meters, electrical panels, or drainage tie-ins are required. Site access and phasing are addressed up front, since many Calabasas ADUs are built while the main house stays occupied. Our approach includes specific material calls—fire-rated drywall or engineered lumber for load points—based on what’s required in Calabasas, Los Angeles, and California. The entire ADU comes together on a single schedule, with every step tied back to the structure and the local code.
Garage Conversion
Turning a garage in Calabasas into living space requires more than just finishes. Ridgeline Western Construction checks the slab, framing, and coordinates all licensed subs so every step passes inspection. We manage the build under one contract for code-compliant, permitted space in Los Angeles.
In-Law Suite Addition
For Calabasas homes needing a private living unit for relatives, an in-law suite addition gives you genuine independence within your property. Ridgeline Western Construction plans the location, coordinates design and code checks, and manages the full permit-to-completion process under one contract. The result: an integrated suite built to function as its own space.
ADU Construction
Building an ADU in Calabasas means creating a fully legal dwelling ready for use or rental with all required permits. Ridgeline Western Construction organizes feasibility, engineering, permits, structural framing, and every trade to keep your project on track. Each phase runs in sequence, supervised by the owner, so your ADU in Calabasas is completed with full documentation for property records.
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About Our Accessory Dwelling Unit in Calabasas
Ridgeline Western Construction is owner-operated by Steven Moreno, a general contractor and framing specialist who is on every project from scope meeting through final walkthrough. In Calabasas, ADU construction is about building a second dwelling by connecting new structure to what’s already there—sometimes tying in at the roof, sometimes working within a garage shell, or starting from a cleared back lot. Steven is hands-on for every frame-up, assesses existing foundations and walls before work begins, and coordinates the permitting, engineering, and inspection process around the real site conditions in Calabasas. Every ADU in this area gets treated as part of a whole property, not just a standalone structure—making sure it ties in right with the main house and meets city and state requirements.
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Ridgeline Western Construction
More About ADUs in Calabasas
ADUs vary by structure. A detached ADU may be a new slab-on-grade or raised-floor building in a rear yard. An attached ADU ties into the existing home’s wall, roof, foundation, and utility paths. Garage conversions keep the existing shell but usually require slab, framing, insulation, opening, and fire-separation upgrades. Junior ADUs work inside the existing home and depend heavily on the original floor plan and bearing walls.
Most ADU calls start with space planning, but the real questions are structural and code-driven. Can the garage framing carry the new use. Can the existing roof be tied into cleanly. Is there room for required setbacks, drainage, utility routing, and fire separation. Wall removals, new openings, beam placement, shear panels, and Title 24 assemblies all affect the final layout.
ADUs require city plan check, permits, inspections, and coordination with utility and energy requirements. Ridgeline Western Construction handles the construction side with framing depth, permit sequencing, licensed sub-trades, and inspection closeout kept under one point of responsibility.
Frequently Asked Questions
Yes. Ridgeline Western Construction is a licensed California Class B general building contractor, fully insured.
Our license number is #1147197Ridgeline Western Construction is based out of San Bernardino serving them and communities throughout southern California including Riverside, Los Angeles, and Orange County.
If you don't see your city listed, reach out and we'll confirm coverage.Framing, home additions, ADU construction, new home construction, whole-home remodeling, structural work, fire damage rebuilds, and commercial construction in Fontana, CA & throughout San Bernadino. The Owner Steven Moreno is an expert in framing and carpentry with anything falling outside of expertise being managed through him allowing you to have your building under one contract.
Yes. Every starts with engineering and permitting mapped out, and closes with inspections and a completed permit record from the building department. You get documentation for every phase.
Framing and carpentry are performed by us. Electrical, plumbing, HVAC, and roofing are handled by licensed subcontractors that we schedule and manage under the same contract that way you have one point of contact for your project.
Call or text Steven at +1 (909) 676-2814. Go over your project, plans or interest in a plan.. Then he'll walk through the scope and put together an estimate for you to continue
What Our Clients Say about us..
"I connected with Steven Moreno at Ridgeline Western Construction about a year ago when I was scoping out a project. Steven’s knowledge blew me away from framing, additions, new construction, materials, etc. He broke everything down like it was nothing & in a way that I actually could understand. The company is based out of Fontana and covers a huge range from San Bernardino and Riverside all the way through Los Angeles and Orange County. So if you’re in that area and need a general contractor that you can rely on then I would highly recommend Ridgeline Western Construction to get the job done right."
- Thomas Shields
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Service Areas
We provide listings of areas we serve if you don't see your city then contact us to confirm.