Free Garage Conversion Estimate · Portland Metro
Free Garage Conversion Estimate in Portland
Office, gym, studio, or a full ADU with kitchen and bath. Structure, insulation, electrical, plumbing, HVAC, and Portland permits from one licensed contractor. Same-day reply.
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Prefer to talk? 844-BOSS-PDX · 7a–5p PT
What it costs
Typical Portland ranges. Your estimate is a fixed price.
Published so you can budget before we talk. Design, engineering, permits, and SDCs are called out separately below so there are no surprises.
Dry conversion
$30,000–80,000
Office, gym, bonus room. Insulation, drywall, electrical, flooring, HVAC.
Garage ADU
$80,000–150,000+
Kitchen, bath, separate entrance, subpanel. $130–250 per sq ft.
Design & engineering
$5,000–10,000
Plans, structural calcs, energy code. 3–6 weeks.
Permits & SDCs
$15,000–25,000
SDCs may be waived or reduced for ADUs under 750 sq ft.
Heating & cooling
$4,000–8,000
Single-zone mini-split sized for 400–600 sq ft.
Structural assessment
$500–1,500
Engineer's review of slab, framing, and ceiling height before design.
Built for here
The garage's condition decides the price.
- Slab, ceiling, framing. A sound slab and adequate ceiling height land near $80k for an ADU; a deteriorated slab or low ceilings trend toward $150k. We tell you which one you have at the estimate.
- Energy code and moisture. Garages weren't built to be lived in — new slab edge insulation, vapor barrier, and rigid insulation are what keep a conversion dry and warm.
- Portland permits and SDCs. Permit fees and System Development Charges run $15–25k; ADUs under 750 sq ft may qualify for SDC waivers. We handle the paperwork.
What happens next
Three steps to a number you can plan on.
We reply the same day
A real person from the Boss PDX team emails you back Mon–Fri, usually within hours, to confirm scope and set a site visit.
Free on-site assessment
We measure, look at existing conditions, and talk through options and finish levels. No pressure.
Fixed written scope and price
A line-item estimate with a schedule — before any crew shows up. If you're not satisfied with the result, we make it right.
“Working with Sean and Justin from Boss PDX has always been a great experience. They take good care of me and my property!”
Questions
Before you fill out the form.
How much does a garage conversion cost in Portland?
A dry conversion to an office, gym, or bonus room typically runs $30–80k for a two-car garage. A full garage ADU with kitchen and bath runs $80–150k+, plus $15–25k in permits and SDCs. You get a fixed written price for your garage.
How long does it take?
A garage-to-ADU conversion takes about four to seven months from design through certificate of occupancy, including 3–6 weeks of design and BDS permit review. Dry conversions are faster.
Can I rent it out?
A permitted garage ADU in Portland rents for about $1,200–2,200 a month depending on size and neighborhood. It needs a kitchen, bath, separate entrance, and its own heating — all in the estimate.
How long do Portland permits take?
Portland Bureau of Development Services turnaround currently adds about 4 to 8 weeks for most residential projects. We handle the application and factor that time into every schedule we quote.
Ready for a number?
Sixty seconds on the form, or one call. Either way, you hear from us today.
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