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ADU Construction — Ridgeline Western Construction
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Ridgeline Western Construction

Framing • Additions • New Construction • Remodeling • Residential • Commercial

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.

Why Choose Ridgeline Western Construction for ADU Construction

Accessory dwelling units add usable living space and legal flexibility to a property. An ADU can be a stand-alone structure, a garage conversion, or an addition attached to the main house. Whether starting from a clean slate or retrofitting an existing structure, code compliance and clear city documentation are non-negotiable. Placing an ADU often means navigating setbacks, height requirements, utility connections, and fire separation rules.

Ridgeline Western Construction delivers ADU construction by managing design, structural engineering, and every permit requirement up front. We self-perform the framing and structural carpentry to make sure the ADU ties into the main structure soundly, using dimensional or engineered lumber as needed. Roofing, stucco or siding, drywall, and finishes are scheduled in a logical sequence, with electrical, plumbing, and HVAC always handled by licensed subcontractors we manage under the same contract. The biggest decisions are usually spacing, setbacks, the location of utility tie-ins, and whether to build new or convert existing square footage.

Every phase closes with inspections and a completed permit record. The finished ADU comes with documentation from the building department showing legal status for renting, resale, or family use. You know what was built, who was responsible for every trade, and how every element meets code—all under one contract.

ADU Construction — Permitting and Documentation Support

Permitting and Documentation Support

ADU approval requires a clean paper trail—drawings, engineering, utility sign-offs, and final city inspections. Ridgeline Western Construction coordinates every submission, addresses plan check comments, and manages inspection sign-offs. You end with a completed permit record for your property and clear documentation for any future sale or rental.

ADU Construction — Full-Scope Project Management

Full-Scope Project Management

Ridgeline Western Construction handles every step of ADU construction—from concept and structural evaluation to permits, framing, and inspections. We schedule and supervise all sub-trades, including electrical, plumbing, and mechanical. This approach means your ADU is managed as one complete project from start to finish, not handed off between separate companies or contractors.

ADU Construction — Framing-Driven Structural Integrity

Framing-Driven Structural Integrity

With framing self-performed by the owner, the structural tie-in, load paths, and seismic details aren't left to interpretation. We assess which beams, posts, or engineered lumber are needed and use the right connectors and shear panels. This focus on structure keeps the ADU solid and makes the sign-off process with plan checkers and inspectors straightforward.

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Need ADU Construction?

Get your adu construction estimate today.

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About Our ADU Construction 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. ADU construction brings unique code and process challenges, from setback navigation to utility tie-ins and inspections. We keep your entire ADU project under one contract, self-perform the structural framing, and coordinate every licensed trade—so you deal with one person from initial scope to city sign-off. Building an ADU is about more than adding a room; it is about creating a permitted, code-compliant structure that works for your property. Our process keeps the timeline transparent and the responsibility clear.

WHY PROPERTY OWNERS CHOOSE US

5 Star Rated 

Licensed & Insured 

Review Quality Home Services on Facebook.
Review Quality Home Services on Google.
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ABOUT US

Ridgeline Western Construction

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Frequently Asked Questions

  • Yes. Ridgeline Western Construction is a licensed California Class B general building contractor, fully insured.

    Our license number is #1147197

  • Ridgeline 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

OTHER SERVICES

Ridgeline Western Construction offers a full range of construction services throughout San Bernardino, Riverside, Los Angeles, and Orange counties.

Home Additions

Home Additions

A home addition is a major structural project, not just an expansion of space. Ridgeline Western Construction manages every phase, from structural planning and engineering to permits, framing, finishing, and inspections. One contract covers all trades—the framing and carpentry are always self-performed, and every specialist is scheduled and supervised to keep the work moving as a single project. You get a finished addition designed to meet code, with a permit record that documents every inspection step.

Home Remodeling

Home Remodeling

Whole home remodeling replaces outdated layouts, worn finishes, and compromised framing with new structure, systems, and interiors under a single contract. Ridgeline Western Construction manages the entire process from design, permits, and engineering to framing, utilities, and all finish work. All framing and carpentry are self-performed, every subcontracted trade is managed, and inspections are scheduled in the right order. You get a unified project that delivers a complete, code-compliant home.

Commercial Remodeling

Commercial Remodeling

Commercial remodeling brings offices, retail locations, and workspaces up to current needs—whether through new layouts, finishes, or mechanical upgrades. Ridgeline Western Construction manages every phase, from the initial walkthrough to city inspection sign-off. We coordinate structural changes, framing, carpentry, and all subcontracted trades so you get a remodel that meets code and fits business operations with one point of contact.

View Services By Area of the propery

Kitchens
KITCHENS
Bathrooms
BATHROOMS

Some property types we work on

ADUs

ADUs

Secondary homes built on the same lot as a primary residence

Detached ADUs

Detached ADUs

Standalone backyard living units with separate structure and systems

Attached ADUs

Attached ADUs

Secondary living units connected to main homes, sharing framing and walls

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

5 out of 5 stars
Facebook review from Thomas Shields
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GET STARTED

TEXT/CALL (909) 676-2814

Service Areas

We provide listings of areas we serve if you don't see your city then contact us to confirm.

San Bernardino County, CA

Riverside County, CA

Orange County, CA

Los Angeles County, CA

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