Mill City ADU Builder
ADU Builder — built by Eugene’s garage & ADU master craftsman, serving Mill City since 1969.
Thinking about an ADU in Mill City? A backyard ADU adds rental income, room for family, and lasting property value — and Red Umbrella has been building garages, ADUs, and additions across Linn County since 1969. Mill City’s canyon setting and mountain climate mean roofing and siding choices for garages differ from valley projects — we spec materials that handle the higher snowload and moisture here.
Building an ADU in Mill City
Mill City sits 70 mi north-northeast of Eugene via I-5 & OR-22. Is up in the foothills, where slope, snow load, and wildfire-resilient construction all come into the plan. Building permits here go through City of Mill City — 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, Mill City is known for North Santiam River gorge, OR-22 Cascade corridor, 1,100 ft elevation, and we tailor every build to fit the lot, the neighborhood, and how you actually live.
ADU Builder in Mill City: 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 Mill City 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 City of Mill City and make the whole path simple.
Mill City ADU questions
What is a junior ADU (JADU) and can I build one in Mill City?
A junior ADU is an ADU created entirely within an existing single-family home — often a converted bedroom, basement, or attached garage — and is capped at 500 square feet in Oregon. JADUs are generally faster to permit and less expensive than full detached ADUs because they use the existing structure’s foundation, roof, and often its utility connections. Red Umbrella can assess whether your home’s existing footprint qualifies and design a JADU that meets Mill City code.
Can I build a garage or ADU without a permit in Mill City to save money?
Building without required permits is not advisable — unpermitted structures in Mill City can be subject to stop-work orders, fines, mandatory demolition, or expensive retroactive permitting when the property is sold. Lenders and title companies routinely flag unpermitted square footage during real estate transactions, making the property harder to sell or refinance. Red Umbrella only builds permitted structures; the cost of permitting is small relative to the risk of going without.
Does building an ADU or addition increase my home’s value?
Adding an ADU or a well-designed addition generally increases a home’s resale value in the Mill City market, though the increase depends on location, finishes, and buyer demand. An ADU that generates rental income is especially appealing to buyers who can offset their mortgage with rent. Red Umbrella builds to quality standards that hold up over time and support strong appraisals.
We also build these in Mill City.
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 →ADUs near Mill City
We build throughout Linn County — here are nearby towns we also serve:
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 Mill City?
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