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Floor plan of an accessory dwelling unit

Custom Tiny Home ADUs in Portland

Starting at $150K*

Discover the freedom and flexibility of a custom tiny home ADU Portland homeowners love. A tiny home ADU is a fully independent living space on your own lot, designed and built to comply with Oregon’s ADU-friendly laws – the ultimate solution for creating rental income, housing loved ones, or expanding your property’s value. Starting at $150K, each tiny home ADU is engineered for your Portland lot and finished to last. For current rules, see the City of Portland ADU program.

With a WCG ADU, you are investing in more than just a building. You are creating opportunity. Whether it is a private space for aging parents, extra income to ease financial burdens, or a sustainable solution to housing challenges, our builds deliver practicality and peace of mind, all while meeting the highest standards of quality and craftsmanship in Portland.

Site conditions and finishes affect final pricing  ·  Free on-site consultation

Quick Summary

A detached tiny home ADU in Portland typically runs $250 to $400 per square foot, with total project investments landing between $150,000 and $350,000+ depending on size, site conditions, and finishes.

Portland allows ADUs up to 800 square feet on most residential lots, owner-occupancy is not required, and a well-built ADU can generate $1,500 to $2,500 per month in rental income while adding lasting resale value in 2026.

Key Details
Foundation
Permanent Concrete
Square Footage
400 to 800 sq ft
Bedrooms
1 to 2
Bathrooms
1 full
Build Type
Fully Custom
At a Glance
Accessible Options
Available
Permitted & Inspected
Yes
ADU Legal
Portland, Oregon
Owner-Occupancy
Not Required
Energy Efficient
Yes

Our design and build process.

No two Portland lots are alike, so we build each ADU around yours. From the first site visit through final inspection, one Woodland team designs, permits, and constructs your unit, keeping the process clear and the schedule on track from start to finish.

I.

Consultation & feasibility

We visit your Portland property, review zoning, setbacks, and utilities, and confirm what size and type of ADU your lot allows. This complimentary consult covers realistic budgets and timelines for 2026.

II.

Design & permitting

Our in-house team designs your ADU, then prepares and submits the full permit package to the City of Portland and manages plan review, so you never chase paperwork or coordinate trades.

III.

Build & walkthrough

We build on a permanent foundation, coordinate every inspection, and hand over a finished, move-in-ready ADU backed by our 1-year craftsmanship warranty.

Client Reviews

What Portland homeowners say.

★★★★★
Rachel B.  ·  Portland, Alberta Arts, OR
★★★★★
Mark & Elise T.  ·  Beaverton, OR

Why build your ADU with Woodland Construction Group?

Adding an ADU is one of the biggest investments you will make in your property, and who you build it with matters as much as what you build. Woodland Construction Group is a family-owned, Portland design-build company. We carry your project from first sketch to final walk-through under one roof, so you always have a single point of contact and a team that stands behind its work.

City skyline with mountain backdrop
Design-build under one roof

Your design and construction stay with one team, so nothing gets lost between an architect and a separate builder.

Portland permitting, handled

We know Oregon’s ADU rules, setbacks, and city review, and we manage the paperwork so you do not have to.

A local family, not a subcontracted crew

The people who plan your ADU are the people who build it, with craftsmanship meant to last decades.

Clear pricing before we break ground

You get a transparent, detailed scope up front, so there are no surprise numbers halfway through.

Built around how you will live

Rental income, a suite for aging parents, a home office, or a guest space, we design for the life you have in mind.

Charming modern cottage surrounded by greenery
Cost Guide

What will your tiny home ADU cost?

Know the numbers before you build. Our Portland ADU cost guide breaks down foundation, framing, systems, and finishes so you can size your budget with confidence – tailored to your lot and the unit you have in mind.

Detached, garage & basement ADU price ranges
Line-item breakdown from sitework to final finishes
Interactive calculator sized to your square footage

Want more info? Ready to start building your ADU today?

Take the first step toward unlocking your property’s potential. Fill out the form, and our team will guide you through the process of creating your perfect ADU, from consultation to final walkthrough.

Next Steps
1

Free Consultation. We will assess your property and help you choose the right ADU solution.

2

Custom Plan. Get a tailored design and layout to fit your unique needs.

3

Build & Install. We build your ADU on-site and hand it over move-in ready.

Quick Estimate

Get your free quote.

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