Oregon & Washington · CCB #250142
(503) 710-2279 — Free Estimate
ADU Builder · CCB #250142

ADU BUILDER IN
OREGON & WASHINGTON

Detached ADUs, attached ADUs, and garage conversions. Permit management included. Serving Portland, Salem, Beaverton, and the entire Willamette Valley.

Free ADU Estimate (503) 710-2279
CCB
#250142 Licensed
ADU
Specialists
Permits Managed
Free
Estimates
Oregon ADU Experts

ADU CONSTRUCTION IN OREGON

Oregon's ADU laws are among the most progressive in the nation — let Mira Contracting build yours from the ground up.

Accessory Dwelling Units (ADUs) are one of the best investments Oregon homeowners can make. Whether you want passive rental income, housing for family members, or a work-from-home studio, Mira Contracting LLC builds ADUs that maximize your property's value.

We've built ADUs in West Linn, Beaverton, Silverton, and across the Willamette Valley. Our ADU builds include complete framing, roofing, siding, windows, covered porches, and full interior finishes — delivered on schedule and on budget.

Oregon's House Bill 2001 significantly expanded ADU rights statewide. Most residentially zoned properties can now accommodate at least one ADU. We help you understand your property's ADU potential, manage the permit process, and build a structure that meets code and adds lasting value.

Need just framing for your ADU? See our framing page. Looking for a full home addition instead? We do that too.

Custom ADU built by Mira Contracting LLC in Silverton Oregon

Custom ADU with covered porch — Silverton, OR

ADU Types

TYPES OF ADUs WE BUILD

Detached ADU

A standalone structure separate from the main house — the most popular type. Maximum privacy, full rental potential. We build detached ADUs throughout Oregon from 400-1,200 sq ft.

Attached ADU

Shares a wall with the main home but has a separate entrance. Ideal when backyard space is limited. We design and frame attached ADUs to seamlessly match your existing home.

Garage Conversion ADU

Transform your existing garage into a livable space. Insulation, framing, electrical, plumbing — we handle the complete conversion from parking space to living space.

Junior ADU (JADU)

A smaller ADU carved out of existing interior space — bedroom, basement, or bonus room. Under 500 sq ft, streamlined permitting, fast construction timeline.

Backyard Cottage

A charming standalone cottage with covered porch, custom finishes, and full utility hookups. Our Silverton ADU with covered porch is a perfect example.

Custom ADU Design

Have a specific vision? We work with your architect or help you find one. Any size, any style — we build ADUs that fit your property and goals.

ADU Portfolio

ADUs WE'VE BUILT

Silverton ADU

Custom detached ADU with covered porch, full interior finishes, and separate utility connections. Move-in ready.

Silverton, OR

West Linn ADU

"West Linn's newest ADU, framed by MIRA." Complete framing and shell package for owner-finish build.

West Linn, OR

Beaverton ADU

Complete framing, T1-11 siding, and window package — ready for mechanicals. Repeat builder client project.

Beaverton, OR
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Service Area

ADU CONSTRUCTION ACROSS OREGON

Portland, OR Salem, OR Vancouver, WA Beaverton, OR Silverton, OR West Linn, OR Hillsboro, OR Woodburn, OR Keizer, OR Sherwood, OR View All Areas →
Frequently Asked Questions

ADU CONSTRUCTION FAQ

What types of ADUs does Mira Contracting build?

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We build detached ADUs, attached ADUs, garage conversion ADUs, junior ADUs (JADUs), and custom backyard cottages throughout Oregon and Washington. CCB #250142.

How much does it cost to build an ADU in Oregon?

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ADU costs range from $100,000 to $350,000+ depending on size, type, site conditions, and finishes. Contact us for a free estimate based on your specific property and goals.

Do you handle ADU permits in Oregon?

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Yes — we manage the complete ADU permit process including site plan review, building permit application, structural engineering coordination, and all required inspections.

How long does it take to build an ADU?

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From permit approval, an ADU typically takes 4-8 months to construct. Permitting itself can take 2-4 months depending on the jurisdiction. We help expedite the process wherever possible.

Can I legally build an ADU on my Oregon property?

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Oregon HB 2001 generally allows ADUs on residentially zoned properties. Local rules still apply. We evaluate your property and advise what's allowed before you invest in plans.

Can an ADU be rented out in Oregon?

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Yes — ADUs can be rented in Oregon. They're one of the best tools for generating rental income on a single-family lot. Many of our clients build ADUs specifically for rental income.

How do I start my ADU project?

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Call (503) 710-2279 or fill out our free estimate form. We'll visit your property, assess your ADU potential, and provide a written quote.

BUILD YOUR ADU TODAY

Free estimate anywhere in Oregon or Washington. CCB #250142 licensed. Call or fill out our form.

Free ADU Estimate (503) 710-2279
(503) 710-2279 @miracontractingllc