10 Best ADU Builders in Portland – 2026

Two Portland-specific programs come up in almost every ADU conversation here, and both are routinely described inaccurately. The Field Issuance Remodel Program, usually shortened to FIR, streamlines permitting and inspections for qualified contractors on specified residential work. Separately, the City’s System Development Charge waiver can eliminate substantial fees, but only in exchange for a recorded 10-year covenant prohibiting short-term rental use of the property. Understanding what each actually does matters more than any single builder choice.

For those interested in residential real estate exposure without a construction project, Ark7 offers fractional interests in professionally managed rental-property series, with shares starting as low as $20, subject to offering availability and eligibility.

This guide profiles 10 companies serving the Portland ADU market, compiled from publicly available company information as of 2026. Addresses, license status, ratings, pricing, and project counts are time-sensitive, so verify each directly through the Oregon Construction Contractors Board before signing.

Key Takeaways

• Builders participating in Portland’s Field Issuance Remodel Program may use a streamlined permit and inspection process for qualifying projects.
• Permit review times vary substantially by project scope and review requirements. Check Portland’s current permit-timeline information before planning a construction schedule.
• Portland maintains an ADU System Development Charge waiver, subject to a recorded 10-year covenant restricting short-term rental use across the property. Violations can trigger repayment at 150% of current SDC fees.
• ADUs may incur substantial System Development Charges unless the project qualifies for the waiver, so obtain a project-specific estimate rather than budgeting from a range.
• Portland issued 615 ADU permits in 2016, according to historical City-supplied data. Current permit records are available through PortlandMaps.
• Portland became an early national leader in ADU policy and construction after policy changes beginning around 2010.
• Ark7 offers shares in professionally managed rental-property series starting at $20 per share, subject to offering availability and eligibility.

How This List Was Compiled

This is an editorial selection based on the considerations below rather than an objectively established ranking, and no order of merit is implied. Companies were compared on experience and track record, ADU specialization, service quality, accessibility and support, and licensing. Most experience figures, project counts, and pricing are company-reported rather than independently audited. Verify licensing through the Oregon CCB and confirm current details directly before signing.

Portland ADU Rules to Understand First

• Field Issuance Remodel Program: FIR stands for Field Issuance Remodel. The City describes it as a program that streamlines permitting and inspections for qualified Oregon-licensed contractors and architects working on specified residential alterations, additions, and accessory structures.
• What FIR does not do: It changes communication, document submission, and inspection scheduling procedures. It does not guarantee a specific permit duration or a single inspector across an entire project.
• Permit timing: Review times vary with project scope, valuation, review requirements, and corrections. Check the City’s current permit-timeline information rather than assuming a standard window.
• Permit types: ADU projects require a building permit and may require separate electrical, plumbing, and mechanical trade permits depending on the work involved.
• System Development Charges: These can be substantial and depend on project characteristics and several bureaus’ fee schedules. Request a project-specific estimate from the City.
• The SDC waiver trade-off: The waiver carries a recorded 10-year covenant restricting short-term rental use across the property. Short-term rentals are not eligible, and violations can trigger repayment at 150% of current SDC fees.
• Zoning: Most single-family residential lots allow ADU construction, but setback requirements, lot coverage limits, and height restrictions vary by zone.

10 ADU Companies Operating in Portland for 2026

1. Shelter Solutions (Long-Established ADU Specialist)

Location: 502 7th Street, Oregon City, OR 97045

Type: Design-Build ADU Specialist

History: Tied to 1997, giving the firm nearly three decades of focused experience

Project Count: Current industry listings describe 250+ completed projects; confirm the current figure directly

What Sets Shelter Solutions Apart:

• One of Portland’s longest-established ADU specialists
• Free ADU planning classes for homeowners
• Aging-in-place designs with ADA-accessible options
• In-house design-build team handling the entire process
• Emphasis on education and multigenerational living arrangements

2. SQFT Studios (Architect-Led, Earth Advantage)

Location: 1018 Southeast 8th Avenue, Portland, OR 97214

Type: Architect-Led Design-Build

Founded: 2015, by architect Eli Green

Recognition: Best of Houzz 2022 and Design Week Portland honors

Industry listings credit the firm with more than 40,000 square feet of added usable space across its projects.

What Sets It Apart:

• States that its qualifying ADUs are built for Earth Advantage certification
• Participant in Portland’s Field Issuance Remodel Program
• Energy Trust of Oregon partner
• The 288 ADU prefab model for streamlined construction

3. Hammer & Hand (Two-Market Premium Builder)

Location: 1011 SE Lincoln St, Portland, OR 97214

Type: Premium Design-Build

Licenses: Oregon CCB #105118, Washington HAMMEHI930M7

Service Area: Portland and Seattle

What Sets It Apart:

• Regional presence across two markets
• ADU 101 educational resources and FAQ libraries
• Portfolio including Wallace Park Modern, Irvington ADU, and Laurelhurst ADU
• Handles garage conversions, attic and basement conversions, attached additions, and new detached units

4. Neil Kelly Inc (Legacy Design-Build)

Location: 804 North Alberta Street, Portland, OR 97217

Type: Full-Service Design-Build

Founded: 1947

Structure: Family-owned and a Certified B Corporation

Neil Kelly is one of Portland’s longest-established residential design-build companies, with four design centers across Portland, Eugene, Bend, and Seattle.

What Sets It Apart:

• Certified B Corporation status
• Full-service capabilities including permits, regulations, and custom design
• Eco-friendly practices integrated into the construction approach
• Service breadth spanning kitchens, baths, additions, custom homes, and solar

5. The Powell Group (Owner-Led Projects)

Location: 118 NW King Ave Unit 21, Portland, OR 97210

Type: Custom Builder

Experience: Company states owner Mitch Powell has more than 20 years of residential construction experience and has built more than 30 ADUs

What Sets It Apart:

• Hands-on, owner-led approach
• Established subcontractor network
• Free ADU feasibility assessments
• Client feedback describing responsive problem-solving and on-schedule delivery

6. MyADU (Multigenerational Focus)

Location: 10110 Northeast 13th Avenue, Vancouver, WA 98686

Type: Design-Build

Service Area: Portland, OR and Vancouver, WA

Timeline: Company-stated 6 to 9 months

MyADU positions itself around keeping family members close rather than pursuing institutional care options.

What Sets It Apart:

• Advertises access to a Portland ADU Loan Program that may provide qualifying borrowers up to $80,000 at 0% interest over 15 years. Confirm current eligibility, funding availability, and program status directly before relying on it.
• ADA-accessible options
• Pre-designed models including Mt. Rainier, Multnomah, and Columbia
• Inclusive pricing model covering design, permits, site prep, and utilities

7. ADU Design and Build LLC (FIR Elite Participant)

Location: 2325 Northeast 19th Avenue, Portland, OR 97212

Type: ADU-Exclusive Contractor

Experience: Eight years focused specifically on ADUs

The company identifies itself as an Elite participant in Portland’s Field Issuance Remodel Program and pairs that with collaborative construction software keeping clients updated in real time.

What Sets It Apart:

• Elite participant in Portland’s FIR Program
• 3D modeling during the design phase
• Collaborative software for client transparency
• Basement conversions, detached units, and garage transformations

8. Exceptional Home Builders NW (Full-Service Management)

Location: 2355 State St, Ste 101, Salem, OR 97301. Based in Salem and markets services to Portland-area homeowners.

Phone: (503) 658-9620

Type: Construction, Design-Build, and Interior Design

What Sets It Apart:

• Stated 24/7 client support availability
• Full permitting support and management
• Interior design services included
• Single-company delivery from concept through completion

9. DeMarco Builders (Schedule Management)

Location: 3341 North Willamette Boulevard, Portland, OR 97217

Type: Residential and Commercial Contractor

Licensing: Oregon CCB licensed since 1996, roughly three decades of contractor experience

What Sets It Apart:

• Critical path management methodology for scheduling
• Residential and commercial construction capabilities
• Custom homes, ADUs, remodels, and additions
• North Portland base

10. Cronen Building (Conversion Specialist)

Location: 8110 SE 45th Ave, Portland, OR 97204

Type: Conversion Specialist

Cronen specializes in transforming existing spaces, including garage conversions and backyard cottages.

What Sets It Apart:

• Conversion expertise maximizing existing structures
• In-law suite and multigenerational focus
• Guidance through the full design and construction process
• Garage conversions can be less expensive than new detached construction when the existing structure is suitable, though foundation, seismic, insulation, utility, fire-separation, or structural work can raise the total

How to Choose the Right ADU Builder

• By process advantage: SQFT Studios and ADU Design and Build participate in Portland’s FIR Program, which provides a streamlined permit and inspection process for qualifying projects.
• By budget tier: Entry-level projects suit Cronen and DeMarco, mid-range projects suit MyADU, The Powell Group, and ADU Design and Build, and premium projects suit Hammer & Hand and SQFT Studios.
• By design emphasis: Sustainable and eco-friendly work sits with SQFT Studios and Neil Kelly, custom and premium with Hammer & Hand and The Powell Group, and family or accessibility focus with MyADU and Shelter Solutions.
• By location: Most firms concentrate in the Portland metro, while Exceptional Home Builders is based in Salem and markets into the area, and MyADU covers both Portland and Vancouver.

Questions to Ask Any Portland ADU Builder

• Do you participate in the Field Issuance Remodel Program, and what does that change for my specific project?
• Have you obtained a project-specific SDC estimate from the City for a comparable build?
• If I take the SDC waiver, do you have experience with the recorded 10-year covenant process?
• How many ADUs have you completed in my neighborhood, and what were the actual permit durations?
• Is your CCB license active, and what date did you last confirm it?
• Do you provide a detailed written estimate separating labor, materials, permits, and contingency?

Financing an ADU in Portland

• Traditional options: Construction loans, home equity lines of credit, and cash-out refinancing all apply to ADU projects.
• Builder-affiliated programs: MyADU advertises access to a Portland ADU Loan Program that may provide qualifying borrowers up to $80,000 at 0% interest over 15 years. Confirm the program’s current status, eligibility criteria, and funding availability directly, since terms and funding change.
• System Development Charges: These can be substantial and depend on project characteristics and several bureaus’ fee schedules. Request a project-specific estimate rather than budgeting from a published range.
• The waiver trade-off: The SDC waiver requires a recorded 10-year covenant restricting short-term rental use, with violations triggering repayment at 150% of current SDC fees.
• Cost benchmarks: Third-party estimates from ADUWizard place detached ADUs at $220,000 to $430,000, garage conversions at $120,000 to $210,000, basement conversions at $110,000 to $200,000, and attached additions at $150,000 to $300,000. Inclusions vary, and site conditions, utility work, seismic upgrades, finish level, design, and permitting can materially change totals.

Comparing ADUs and Fractional Real Estate

Building an ADU can create rental-income potential and may affect a property’s value, though the amount varies by location, size, and finish quality. It also requires substantial capital, months of project management, and ongoing landlord responsibilities.

ADU considerations:

• There is no reliable citywide ADU rent figure for Portland. Compare current long-term rental listings in your specific neighborhood, matched to your planned unit size and bedroom count.
• If short-term rental income is part of your plan, the SDC waiver’s 10-year covenant will prohibit it, so decide which matters more before applying.
• Any rent-to-cost figure should be stated as an illustrative gross estimate, calculated as annual rent divided by total project cost before expenses, not as a return on investment.
• Treat any property-value effect as something a local appraiser confirms rather than a percentage you assume.
• Garage conversions can cost less than new detached construction when the existing structure is suitable, but structural and utility work can close that gap.

How fractional investing compares:

For those who prefer fractional real estate exposure rather than developing and managing an ADU directly, Ark7 is another model to consider:

• Shares in professionally managed rental-property series starting at $20 per share, subject to offering availability and eligibility
• Cash distributions when available, subject to property performance, expenses, reserves, and offering terms
• Professional property selection and management
• Exposure across multiple markets rather than a single Portland property
• No construction timelines, permitting, or SDC covenants to manage
• Potential access to secondary trading, subject to holding periods, legal and state restrictions, platform availability, and market liquidity. Liquidity is not guaranteed.
• Ark7 IRA options support Traditional and Roth accounts, subject to IRA rules, custodian fees, and individual circumstances

These are speculative securities involving substantial risk, including illiquidity, lack of diversification, and complete loss of capital.

Conclusion

Portland remains one of the more workable ADU markets in the country, but the details that determine whether a project pencils out are local and project-specific. Permit timing depends on scope and review requirements rather than a standard window, System Development Charges depend on your project rather than a headline range, and the SDC waiver comes with a decade-long restriction that directly conflicts with short-term rental plans.

Why Portland Stands Out for ADU Projects

• Early policy leadership: Portland became a national leader in ADU policy and construction after changes beginning around 2010.
• SDC waiver program: Available for qualifying projects in exchange for a recorded 10-year covenant.
• Field Issuance Remodel Program: Streamlined permitting and inspection for qualifying projects with participating contractors.
• Deep builder market: Architect-led firms, legacy design-build companies, and conversion specialists all operate locally.
• Public permit data: PortlandMaps provides live ADU permit records for market research.

Investor Tips for Portland ADU Projects

Decide early whether short-term rental income is part of your plan, because accepting the SDC waiver means recording a 10-year covenant that prohibits it, with repayment at 150% of current fees if violated. Request a project-specific SDC estimate from the City rather than budgeting from a published range. Check Portland’s current permit-timeline guidance instead of assuming a standard review window, and ask whether your builder participates in the FIR Program and what that changes for your specific project. Verify every CCB license directly and note the date. When modeling returns, build rent projections from current comparable listings rather than a citywide range.

For those who prefer residential real estate exposure without a construction project, Ark7 offers shares in rental-property series starting at $20, subject to offering availability and eligibility.

Frequently Asked Questions

What does Portland’s FIR Program actually do?

FIR stands for Field Issuance Remodel. The City describes it as a program that streamlines permitting and inspections for qualified Oregon-licensed contractors and architects working on specified residential alterations, additions, and accessory structures. It changes communication, document submission, and inspection scheduling procedures. It does not guarantee a specific permit duration or assign a single inspector across an entire project, and it is not an abbreviation for “fast inspection ready,” a description that appears frequently in marketing materials.

Is Portland’s SDC waiver worth taking?

That depends entirely on your rental plans. The waiver can eliminate otherwise-applicable ADU System Development Charges, which can be substantial. In exchange, you record a 10-year covenant restricting short-term rental use across the property, short-term rentals are not eligible, and violations can trigger repayment at 150% of current SDC fees. If nightly rental income is central to your model, the waiver may cost more than it saves. Request a project-specific SDC estimate from the City to weigh the actual figures.

What permits are required for ADU construction in Portland?

ADU projects require a building permit and may require separate electrical, plumbing, and mechanical trade permits depending on the work involved. Portland directs applicants to determine which forms and permits their particular project requires. Permit review times vary substantially by project scope, valuation, review requirements, and corrections, so check the City’s current permit-timeline information rather than planning around a fixed window. Most builders handle permit applications as part of their service.

Can I build an ADU on any Portland residential property?

Most single-family residential lots in Portland allow ADU construction, but specific requirements vary by zone. Setback requirements, lot coverage limits, and height restrictions all affect what you can build. Many builders offer free feasibility assessments to evaluate your property before you commit to design work, which is worth taking advantage of before spending on plans.

How much rental income can a Portland ADU generate?

Rental income varies significantly by location, size, and finish quality, and there is no reliable citywide ADU rent figure. Compare current long-term rental listings in your specific neighborhood, matched to your planned unit size and bedroom count, rather than relying on a general range. Remember that if you accepted the SDC waiver, short-term rental income is off the table for a decade.

Neither Ark7 nor Ark7 Properties is a broker-dealer or an investment adviser. Dalmore Group LLC, a registered broker-dealer and member FINRA/SIPC, located at 525 Green Place, Woodmere, NY 11598, is the broker-dealer of record for Ark7, an issuer direct offering. Neither Ark7 nor Dalmore makes recommendations or provides advice about investments, and nothing here should be construed as a recommendation for any security. An investment in an offering constitutes an investment in a particular series and not in Ark7 or any of the underlying assets. Investments on the Ark7 platform are speculative and involve substantial risks, including illiquidity, lack of diversification, and complete loss of capital. Cash distributions are not guaranteed and are subject to property performance, expenses, reserves, and offering terms. Past performance is no guarantee of future results. This article is for informational purposes only.