ADU Builder Serving Alpine, OR
ADU Builder — built by Eugene’s garage & ADU master craftsman, serving Alpine since 1969.
Thinking about an ADU in Alpine? A backyard ADU adds rental income, room for family, and lasting property value — and Red Umbrella has been building garages, ADUs, and additions across Benton County since 1969. Alpine’s hilltop setting among Coast Range vineyards means your garage or addition benefits from long views — and benefits from a builder who plans drainage for hillside lots, not flat-valley ones.
Building an ADU in Alpine
Alpine sits 35 mi northwest of Eugene via OR-99W & local roads. Is surrounded by working farmland where efu zoning and generous setbacks shape what — and where — you can build. Building permits here go through Benton County — a process we know well — and for an ADU, that shapes how utilities connect and whether a detached cottage or an attached unit fits best.
Locally, Alpine is known for Alpine Tavern (est. 1936), OSU Woodhall Vineyard, Alpine Century Bike Ride, Alsea Falls BLM access, and we tailor every build to fit the lot, the neighborhood, and how you actually live.
ADU Builder in Alpine: what we build
We build detached backyard cottages, attached units, and ADUs above or beside a garage — designed, permitted, and built end to end.
- Detached & attached ADUs, 400–900+ sq ft
- Garage-to-ADU conversions (our specialty)
- Permits, utilities & site work handled
- Up to 120% financing — cash-flows as a rental
Why Alpine homeowners choose Red Umbrella
- Garages and ADUs under one roof — the rare shop that masters both, so a garage-with-a-suite is one project, one crew.
- Master Electrician in-house — owner Bari Swartz wires it himself, to code, no waiting on a sub.
- Building since 1969 — you work directly with Bari, not a sales rep or a rotating cast of subs.
- Permits handled & up to 120% financing — we know Benton County and make the whole path simple.
Alpine ADU questions
Can I build an ADU on a lot that already has a duplex in Alpine?
Oregon state law (SB 1051 and subsequent updates) expanded ADU rights broadly, and Alpine’s code reflects that, but ADU eligibility on multi-family lots like duplexes depends on the specific zoning district and lot size. Red Umbrella’s team reviews your parcel during a free consultation and checks with Alpine Development Services when a lot’s eligibility is borderline. Don’t assume your lot qualifies or doesn’t without a professional review.
Does Red Umbrella pull permits for all of its work?
Yes — Red Umbrella pulls all required building, electrical, plumbing, and mechanical permits for every project. Bari Swartz holds Oregon Contractor’s license CCB #210412 and a Supervisory Master Electrician credential, covering structural and electrical work without additional subcontractors. Unpermitted construction creates serious liability for homeowners and is not something Red Umbrella does.
What does “financing up to 120%” mean for a construction project?
Financing up to 120% of project cost means the loan can cover not only the construction contract amount but also an additional 20% to account for incidentals such as permits, system-development charges, landscaping after construction, or minor scope changes. This helps homeowners avoid out-of-pocket surprises during construction. HFS Financial, a lender partner of Red Umbrella, offers this type of product for qualifying borrowers.
We also build these in Alpine.
Garage Conversion
A garage conversion is the fastest, most affordable way to add finished living space.
Learn more →
Custom Garage
A custom garage means covered parking, a real workshop, RV storage, or an apartment above.
Learn more →
Home Additions
A seamless addition adds the room you need without the cost and upheaval of moving.
Learn more →Trusted across the valley.
"Bari built us a fine, 600 sq ft cottage (ADU) in our back yard. Helpful from start to finish through the permit process."
"Our garage was crushed by a tree in the ice storm. Red Umbrella, garage specialists, were perfect for the job."
"Bari at Red Umbrella is a solid contractor! We hired him to remodel our garage in College Hill, and it became a special place to live and enjoy."
Planning an ADU in Alpine?
Bari will look at your lot and give you an honest number — permits handled, up to 120% financing, usually a reply within one business day.
Get My Free Estimate → Call (541) 515-3843