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Ridgeline Western Construction
Framing • Additions • New Construction • Remodeling • Residential • Commercial
Detached Accessory Dwelling Unit General Contractor
Detached ADUs are standalone backyard dwelling units with their own foundation, framing, roof, utilities, and permit path. Ridgeline Western Construction builds them as complete ground-up structures, with framing and carpentry self-performed, licensed plumbing, electrical, and HVAC subs scheduled and managed by us, and city inspections carried through closeout.
What We Build For Detached ADUs
For detached ADUs, Ridgeline Western Construction handles the full structural build from excavation to weather enclosure. Our crew lays out the foundation, sets and ties rebar for slabs or places piers for raised floors, and assembles the wood framing—walls, headers, roof trusses, and shear panels—according to plans and engineering. Door and window openings are framed for specified assemblies, insulation cavities set with accuracy, and all seismic hardware and structural connectors go in per the detail sheets. Load paths get checked as we go, not just at inspection.
All licensed plumbing, electrical, and HVAC trades are scheduled, coordinated, and managed by us under one contract. Roofing surfaces go through our licensed roofing partner, and utility connections are kept in sync with city requirements. Every step from permit application to final inspection is tracked and closed in sequence, so there’s a single point of responsibility from start to finish.
Detached ADUs bring challenges in access, setbacks, and fire separation. We prep for tight material deliveries, protect the main house and yard, and adjust sequencing for shared driveways or narrow lots. Where zoning or codes call for fire-rated walls or eaves, we assemble those details with the right materials and inspections to match. Grading, drainage, and finish tie-ins are planned early so the new unit fits both the lot and the existing site drainage.
ADU Construction
ADU construction can turn unused yard space or an underbuilt garage into a code-compliant, permitted dwelling. Ridgeline Western Construction manages the entire ADU process from engineering and permits through buildout. We coordinate every step—design, structural framing, rough trades, and finish work—under a single contract and schedule. The result is one point of responsibility and a legal accessory unit ready for use or rental, with full permit documentation.
Backyard Office Shed
A backyard office shed lets you create a standalone office, studio, or workspace right on your property. Ridgeline Western Construction manages the entire process—site prep, concrete foundation, framing and all required trades—under one contract. You get a fully built structure, permitted and inspected, ready for use as soon as we finish. From the foundation to drywall, every step keeps structure and compliance at the center. No handoff to sales reps—work directly with the contractor throughout.
Garage ADU Conversion
Garage ADU conversion turns an existing attached or detached garage into a fully permitted accessory dwelling unit. Ridgeline Western Construction manages the process from initial assessment through completed interior and city sign-off. We handle structural changes, energy code upgrades, utility tie-ins, and all finishing work. Every trade is scheduled and coordinated under one contract, minimizing handoffs and risk. You get a garage transformed into legal, livable space—with permits and inspection records to prove it.
Need Detached Accessory Dwelling Unit Work Done?
TEXT/CALL (909) 676-2814
View Detached Accessory Dwelling Unit Services By The Area
About Our Detached Accessory Dwelling Unit Services
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. Detached ADUs demand skill at ground-up structure — every framing and layout detail matters because this building stands on its own, not tied to the main house. Steven personally lays out the foundation, verifies the tie-in points, and frames the entire shell so the structure, utilities, and finishes fit the site and pass every inspection. Overlooked grading, misaligned entries, or water flow issues become construction headaches if not caught early; Steven sees them up front and builds the ADU around the real conditions of the yard. The result is a detached ADU that stands as a true, compliant structure on the lot, not a backyard afterthought.
WHY PROPERTY OWNERS CHOOSE US
5 Star Rated ★
Licensed & Insured ⛨
ABOUT US
Ridgeline Western Construction
who we are
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. For us, general contracting means staying hands-on: framing and carpentry self-performed, direct field management during every sequence, and all licensed subcontractors signed onto a unified schedule. Each job starts with engineering and permitting mapped out and ends with a permit record the city and owner both accept as final. Every decision gets made face to face on the project, not handed down. That’s how we deliver accountable completion on each project, with all trades managed and every phase closed out properly.
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.