How review works
Each discipline (planning, residential, structural, plumbing, electrical, mechanical, BES, sometimes Urban Forestry and PBOT) reviews the plans in parallel and produces a list of corrections. You — through your designer — answer every comment in writing and resubmit revised plans.
Most Portland DADUs clear in 2 rounds. A clean submittal (especially a pre-approved set) can clear in 1.
Typical timeline
- First round: 8-16 weeks. The slowest discipline sets the clock.
- Your response: 2-6 weeks. This is the part you control.
- Second round: 4-8 weeks.
- Total: 12-24 weeks is normal.
How to keep it moving
- Respond to comments in batches — one consolidated response is faster than drip-feeding.
- For each comment, quote the comment, state your response, and point to the sheet or detail that resolves it. Reviewers like this and clear comments faster.
- If a comment looks wrong, call the reviewer. Phone numbers are right on the comment sheet. A 10-minute call resolves what would otherwise take a full revision cycle.
When something stalls
If a single discipline has been silent for 4+ weeks, escalate through DevHub or call the assigned reviewer. PP&D isn't adversarial — most stalls are queue depth, not opposition.
Go deeper
Optional reading. Skip if you only need the headline.
›How to structure a correction response so the next cycle is shorterThe response-letter format experienced Portland designers use to close PP&D corrections in one round instead of three.
The response letter format
When a PP&D reviewer re-opens the project, they read the correction comments and then look for your response. If your response is scattered across email threads or buried in sheet notes, they re-issue the comment. Your resubmittal needs a single correction response letter that mirrors the PP&D comment list exactly.
For each numbered comment, give them three things in order:
- The original comment, verbatim. Don't paraphrase — reviewers look for their own wording first.
- The response. One of four stock framings:
- "Revised — see sheet A2.1, detail 4, revision cloud 3." (Most comments.)
- "Acknowledged — the condition does not apply because [narrow, specific reason]." (Use sparingly; every one of these is a fight you're choosing.)
- "Clarification added — see general note on A0.0." (For anything a reviewer flagged as "ambiguous.")
- "See attached calc / memo from [engineer], dated [date]." (For structural or BES comments that need a discipline response.)
- A direct pointer to where the change lives: sheet number, detail number, revision cloud number. Never "see revised drawings" — always the exact spot.
Revision clouds and deltas
Every drawing change goes inside a revision cloud, with a delta triangle pointing to the revision number in the title block. The title-block revision log has to match the response letter's revision number. Reviewers scan for that match first; if the delta doesn't match the response, the comment reopens.
What experienced Portland designers do differently
- They close corrections in one round, not two. Common-cause comments (missing energy path on the mechanical sheet, missing BES BMP sizing on small infiltration designs, missing fire-rated assembly detail at a shared wall) are predictable. An experienced designer pre-empts them in the first submittal so there's nothing to correct.
- They front-load structural coordination. Structural corrections are the single biggest source of a second round — the engineer answers a comment, the architect redraws the assembly, and that's a 3-week internal loop before PP&D ever sees it. Getting structural drawings into the first submittal at 95% resolution (not 70%) cuts a full cycle off the project.
- They call the reviewer when a comment looks wrong. Phone numbers are right on the comment sheet. A 10-minute call resolves what would otherwise take a written-revision cycle. Pick this fight on the call, not on paper.
- They pick their fights. One or two pushback comments in the letter is normal. Five is adversarial and usually costs you a cycle. If a reviewer misread a condition, call it out narrowly and move on — don't bundle it with a general objection.
What to hand the reviewer on resubmittal
- Revised drawings (full set), with revision clouds and the revision log updated.
- The correction response letter (PDF), uploaded through DevHub against the original review.
- Any new supporting calcs, memos, or product data as separate PDFs, referenced from the response letter by filename.
- A cover note confirming no scope changes outside the correction comments — reviewers re-scope if they find changes they didn't ask for.
Where this information came from
- Portland Permitting & Development — Accessory Dwelling Units · retrieved April 23, 2026
- Portland City Code Title 33.205 — Accessory Dwelling Units · retrieved April 23, 2026
- Portland Maps (per-address zoning, hazards, utilities) · retrieved April 23, 2026
- Portland PP&D — System Development Charges (current fee schedules) · retrieved April 23, 2026
- Oregon CCB — Verify a Contractor · retrieved April 23, 2026
- Accessory Dwellings (Kol Peterson) — Portland-focused ADU resource · retrieved April 23, 2026