Portland ADU permits typically take six to twelve weeks through BDS. Building and plan review fees run roughly $2,000 to $3,000, but System Development Charges can add $15,000 to $37,000, unless you qualify for the city's full 10-year waiver program.
Last verified: July 14, 2026
Portland’s permit process itself is straightforward. What trips people up is a fee structure that can swing from around $3,000 to over $37,000 depending on one decision you make before you even submit. I’ve watched homeowners find out about that decision halfway through their project, which is too late to plan around it.
That decision is the System Development Charge waiver, and it deserves top billing on this page.
What Changed for Portland ADU Permits in 2026
Oregon’s statewide ADU framework hasn’t moved much for 2026. The core rules, no owner-occupancy requirement, cities over 2,500 people required to allow at least one ADU per single-family lot, trace back to Senate Bill 1051 (2017) and House Bill 2001 (2019). If you’re comparing Portland to a California market on this page, that’s the biggest structural difference: Oregon isn’t in the middle of a legislative overhaul the way California is.
What actually moved is local, not statewide, and it’s worth being precise here since I’ve seen the number get garbled elsewhere. Portland’s SDC break isn’t a state law and it isn’t a 50 percent reduction. It’s a full waiver of every system development charge on an ADU, under Portland City Code 17.14.070, conditioned on a 10-year covenant against short-term rental use recorded before the permit issues.
Portland’s Bureau of Development Services floated a proposal to sunset that waiver program entirely. After pushback from the Home Builders Association of Metro Portland and other industry stakeholders, the city tabled the immediate sunset and kept the program running while discussions continue. If you’ve read anywhere that the waiver is going away, that’s outdated or premature. As of this writing it’s still active, but I’d confirm its status before you bank a project’s budget on it, since this is exactly the kind of local decision that can change with a council vote.
How the Portland ADU Permit Process Works
Everything routes through Portland’s ADU permitting page and the Development Hub PDX portal, either online or in person at 1900 SW 4th Ave. The process runs in roughly seven stages: research your property (zoning, utility connections, hazard overlays), prepare your application package (site plan, architectural plans, structural calculations, Oregon energy code compliance), submit through Development Hub PDX, respond to plan review checksheets if corrections come back, pay final fees once approved, then move to construction and inspections.
BDS also offers free 15-minute appointments, one with a city planner on zoning questions, one with a building code reviewer on construction and engineering questions. Use them before you submit, not after a checksheet comes back with something you could have caught earlier.
| Fee component | Amount | Notes |
|---|---|---|
| Land use plan review | $251.76 (city sample figure, dated July 2023) | Verified from an official city sample fee page, but not a current 2026 rate; expect some increase |
| Building plan review | $568.33 (2023 sample) | Verified 2023 sample; confirm current rate with BDS’s fee estimator |
| Building permit (residential) | $901.85 (2023 sample) | Verified 2023 sample; scales with valuation |
| System Development Charges (all bureaus) | Roughly $15,000 to $19,000 in the 2023 sample, commonly cited up to $37,000 in 2026 sources | Waivable in full with a 10-year no-short-term-rental covenant |
| SDC waiver application | $600 (2023 sample; not listed as a fee on the program’s current page) | Unverified for 2026: the two official sources disagree on whether this fee still applies |
Source: City of Portland sample fee schedule (2023) plus commonly reported 2026 figures, confirm with BDS
I want to be direct about that table. The only page where Portland publishes actual dollar figures for a new detached ADU is a sample-fees page dated to July 2023 rates, and city fee schedules generally go up, not down, so treat those specific numbers as a floor, not a current quote. Multiple 2026-dated sources cite total System Development Charges as high as $37,000 before any waiver, which is a wide spread from the roughly $19,000 in the city’s own 2023 example. Both can be true if SDC rates rose over that time, but I can’t confirm the exact current total from an official published table. Use BDS’s Building Permit Fee Estimator for your specific project before you budget off any number here, mine included.
That fee spread is one line in the full Portland ADU cost breakdown, which covers the whole build, not just the permit.
| Phase | Typical duration (in weeks) | Department |
|---|---|---|
| Intake & completeness review | 1 week | BDS Development Services Center |
| Plan review | 4 to 8 weeks | BDS |
| Corrections & recheck | 1 to 3 weeks | BDS |
| Permit issuance | Under 1 week | BDS |
Source: Commonly reported BDS timelines, not an official published table, confirm current queue at submittal
Add it up and you land at roughly six to twelve weeks from a complete application to permit in hand, which matches what BDS itself suggests for a standard review. That’s before construction starts.
Portland’s Pre-Approved Plan Program
Portland offers four free pre-approved designs for detached ADUs, originally developed by the City of Eugene and adapted for Portland’s code: a gable roof on a slab foundation, a shed roof on a slab foundation, and versions of each with a wood-framed floor over crawl space instead. Because these already cleared structural review once, using one skips a real chunk of the plan review grind.
The catch, and it’s a real one: at least one of the shed roof options is noted by the city itself as exceeding standard side or rear setback limits, meaning it needs a site-specific check even though the base design is pre-approved. Read the actual plan notes before assuming “pre-approved” means “fits any lot.”
Portland-Specific Rules That Trip People Up
The SDC waiver is an all-or-nothing ten-year bet
Sign the covenant and neither the ADU nor the main house can go on a short-term rental platform for ten years, for any structure on the property, not just the ADU. Break it and you owe 150% of the current SDC fees. That’s a serious commitment for anyone even considering short-term rental income down the road, and I’ve seen homeowners sign it without really registering what it locks them out of.
Design review kicks in earlier than people expect
New detached ADUs over 15 feet tall trigger additional design requirements. On a lot where you want real ceiling height or a loft, that threshold arrives faster than most first-time applicants assume.
Setbacks aren’t a flat number
Portland’s minimum side and rear setbacks start at five feet but can run larger depending on the property’s specific zoning. Don’t design to the five-foot minimum and assume it’s guaranteed; confirm your actual zone’s requirement before you finalize a site plan.
Utility connections get checked at the research stage, not later
BDS’s own process starts with verifying utility connections and hazard overlays before you even prepare your application. Skip that step yourself and plan review is where an undersized connection surfaces, usually after you’ve already paid for drawings.
The waiver’s future is genuinely unsettled
Because a sunset was proposed and only tabled, not withdrawn, this is one of the few pages where I’d tell you the rule itself might change while your project is still in the pipeline. Build in a buffer for that possibility if your budget depends on the waiver.
What I’d Do If I Were Permitting in Portland Right Now
I’d apply for the SDC waiver covenant as close to day one as I could, since it’s the single biggest number on this whole page and the program’s future isn’t guaranteed to look the same next year. I’d also check the four pre-approved plans before committing to a custom design, specifically checking the setback notes on each one against my actual lot.
And I’d call the Development Services Center, not just read their page, to confirm the waiver application fee and current SDC totals before finalizing a budget. The gap between the city’s 2023 sample numbers and what 2026 sources report is too wide to guess at.
Frequently Asked Questions
How long does an ADU permit take in Portland?
Realistically six to twelve weeks from a complete application to permit issuance, with plan review itself typically running four to eight weeks. Corrections, if needed, usually add one to three more weeks.
How much does an ADU permit cost in Portland?
Building and plan review fees alone run roughly $2,000 to $3,000. The System Development Charges are the real variable, commonly cited from around $15,000 up to $37,000, but they’re fully waivable if you sign a 10-year covenant not to use the property as a short-term rental.
What department handles ADU permits in Portland?
The Bureau of Development Services (BDS), through the Development Hub PDX portal. Applications can be submitted online or in person at 1900 SW 4th Ave.
Does Portland require an owner to live on the property to get an ADU permit?
No. Oregon state law prohibits cities from requiring owner-occupancy as a condition of ADU approval, and that applies in Portland.
Is the SDC waiver worth it if I might want to rent the ADU short-term later?
Only you can weigh that tradeoff, but understand it’s an all-or-nothing ten-year commitment covering the entire property, not just the ADU, and breaking the covenant costs 150% of the current SDC fees. If short-term rental income is a real possibility for you, run the math before you sign.
If you’re comparing the full build cost, not just the permit, our Portland ADU cost breakdown has the fuller numbers, our Oregon permit overview covers what changes outside city limits, and the permits pillar and Data Hub are the right next stops if you’re weighing Portland against another market.