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Portland garage to ADU conversion by H&C Design-Build

Portland Garage ADU Conversions

We convert existing garages into ADUs with detailed checks for structure, utility scope, and permit requirements. This service is focused on realistic conversion planning before construction starts.

Craftsman Warranty Financing Available

“Thomas and his team completely transformed our home. The craftsmanship is exceptional.”

Sarah & Mark J. NW Portland

Our Garage Conversion Approach

Know what your garage can become.

Not every garage is a candidate for conversion. Slab condition, ceiling height, structural framing, and utility access all determine whether a conversion is practical or whether a different ADU path makes more sense.

We assess your existing structure against Portland code requirements and give you a straight answer on scope, cost drivers, and permit needs before any commitment.

Condition and Feasibility Review
1
Stage 01

Condition and Feasibility Review

We confirm whether conversion is practical based on structure, access, and code requirements.

  • 1 Slab thickness, foundation condition, and ceiling height measured against code minimums
  • 2 Electrical panel capacity and plumbing access evaluated for conversion scope
  • 3 Setback, lot coverage, and parking requirements checked for compliance
Permit and Trade Coordination
2
Stage 02

Permit and Trade Coordination

Mechanical, electrical, plumbing, and structural scope are aligned with permit needs before build.

  • 1 Structural engineering and trade plans submitted for permit review
  • 2 Insulation, ventilation, and egress requirements addressed in design
  • 3 Utility connection scope and inspection sequence mapped before construction
Conversion Build and Closeout
3
Stage 03

Conversion Build and Closeout

Construction proceeds in inspection-ready phases with final turnover once approvals are complete.

  • 1 Framing, insulation, and mechanical rough-in inspected before finishes
  • 2 Interior finishes, fixtures, and appliances installed on coordinated schedule
  • 3 Final inspection and occupancy approval completed before handoff

Portland Garage ADU Conversions

Recent Garage and Conversion Projects

1 / 1
N Wall remodel
Garage + Lot Subdivision

N Wall

N Portland

Garage relocation with new foundation as part of lot subdivision. Structural and site work coordinated through permit closeout.

View Project

Project Financing

Finance your project without delaying the work.

H&C Design-Build now offers financing options through U.S. Bank Avvance. If you are evaluating a remodel, you can review pre-approval options before final scope decisions are locked.

  • Apply before design and permit decisions are finalized
  • Get pre-approval visibility before you commit to full scope
  • Keep kitchen, bath, structural, and exterior work on one timeline
Discuss financing options Call (971) 409-5926

Financing is offered through U.S. Bank

U.S. Bank Avvance financing pre-approval banner (gray version, cropped)

Our Guarantee

1-Year Craftsman Warranty

We stand behind our work. Every H&C project includes a written one-year workmanship warranty backed by our Oregon contractor bond and insurance.

Full-Year Workmanship Coverage

Every joint, cut, and connection we make is backed for 12 months from substantial completion. If our work fails, we fix it at no cost to you.

Written Warranty on Every Project

You receive a signed warranty document at closeout. No verbal promises. No fine-print surprises. The scope is clear before you sign off.

Responsive Claim Process

Report a defect in writing or by email within 30 days of discovery. We schedule an inspection, confirm the issue, and handle the repair.

What the Warranty Covers

  • Covers all workmanship performed by our crews under the original contract scope
  • Repair or replacement at our discretion for valid claims
  • Does not cover owner-supplied materials, normal wear, or unauthorized modifications
  • Manufacturer warranties on products and materials remain separate and are passed through to you
  • Oregon CCB dispute resolution available if any disagreement arises
OR CCB #251405 Licensed · Bonded · Insured in Oregon

From Our Crew

We write about
what we build.

Portland remodeling is what we do every day. These guides cover the real decisions homeowners face: permits, costs, materials, and trade coordination.

All guides
Feb 2026 9 min read

Portland Garage to ADU Conversion: Costs, Codes, Permits

Portland garage to ADU conversion guide. 2026 zoning regulations, permit requirements, realistic costs, and what contractors check first.

Read guide
Jan 2026 8 min read

Portland Building Permits: What You Need and What It Costs

Portland permit requirements explained by a contractor. What work needs a permit, what is exempt, and why skipping permits costs more long-term.

Read guide