---
type: "Bill"
title: "Relating to accessory dwelling units on lands zoned for rural residential use; and declaring an emergency."
description: "<i>Removes certain</i>] <b>Amends</b> requirements relating to wildfire <i>risk maps</i>]<b> hazard mitigation</b> for development of accessory dwelling units on lands zoned for rural residential use."
jurisdiction: "us/states/or"
legislature: "Oregon Legislative Assembly"
session: "2023R1"
identifier: "SB 644"
citation: "Oregon SB 644 (2023R1)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Lynn Findley", "Tim Knopp"]
version_count: 5
action_count: 24
vote_count: 4
first_action: "2023-01-09T18:53:53+00:00"
last_action: "2023-05-16T23:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/32b3146e-e2c3-49da-adeb-38a03759b0eb"
source_url: "https://olis.oregonlegislature.gov/liz/2023R1/Measures/Overview/SB644"
source_hash: "2d67ecfacd823a99bd6bc4178a6411f7b83cc3d275eba2d0352fead3201b32b5"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-or"]
---

# Oregon SB 644 (2023R1) — Relating to accessory dwelling units on lands zoned for rural residential use; and declaring an emergency.

<i>Removes certain</i>] <b>Amends</b> requirements relating to wildfire <i>risk maps</i>]<b> hazard mitigation</b> for development of accessory dwelling units on lands zoned for rural residential use.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Introduced** (filed) — [source](https://olis.oregonlegislature.gov/liz/2023R1/Downloads/MeasureDocument/SB644/Introduced)
2. **Senate Amendments to Introduced** (filed) — [source](https://olis.oregonlegislature.gov/liz/2023R1/Downloads/MeasureDocument/SB644/Senate%20Amendments%20to%20Introduced)
3. **A-Engrossed** (committee substitute) — [source](https://olis.oregonlegislature.gov/liz/2023R1/Downloads/MeasureDocument/SB644/A-Engrossed)
4. **SNR Amendment -4** (committee substitute) — [source](https://olis.oregonlegislature.gov/liz/2023R1/Downloads/ProposedAmendment/23002)
5. **Enrolled** (enrolled) — [source](https://olis.oregonlegislature.gov/liz/2023R1/Downloads/MeasureDocument/SB644/Enrolled)

## Votes

- Heard and Reported Out — **9–0** (pass) · lower
- Third reading. Carried by Knopp. Passed. — **27–2** (pass) · upper
- Heard and Reported Out with Amendments — **5–0** (pass) · upper
- Third reading. Carried by Marsh. Passed. — **59–0** (pass) · lower

## Sponsors

- Lynn Findley — primary (person)
- Tim Knopp — primary (person)
- Cedric Hayden — cosponsor (person)
- David Brock Smith — cosponsor (person)
- James Hieb — cosponsor (person)
- Michael Dembrow — cosponsor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2023-01-09T18:53:53+00:00** Introduction and first reading. Referred to President's desk. `introduction, reading-1, referral-committee`
- **2023-01-13T19:45:37+00:00** Referred to Natural Resources. `referral-committee`
- **2023-03-01T16:01:00+00:00** Public Hearing held.
- **2023-03-15T15:02:00+00:00** Work Session held.
- **2023-03-22T16:21:01+00:00** Recommendation: Do pass with amendments. (Printed A-Eng.) `committee-passage-favorable`
- **2023-03-23T18:14:27+00:00** Second reading. `reading-2`
- **2023-03-27T17:34:50+00:00** Carried over to 03-28 by unanimous consent.
- **2023-03-28T19:09:53+00:00** Third reading. Carried by Knopp. Passed. `passage, reading-3`
- **2023-03-28T19:10:53+00:00** Findley declared potential conflict of interest.
- **2023-03-29T17:22:00+00:00** First reading. Referred to Speaker's desk. `introduction, reading-1, referral-committee`
- **2023-04-03T21:18:11+00:00** Referred to Climate, Energy, and Environment. `referral-committee`
- **2023-04-12T22:01:00+00:00** Public Hearing cancelled.
- **2023-04-17T22:01:00+00:00** Public Hearing held.
- **2023-04-19T22:02:00+00:00** Work Session held.
- **2023-04-20T18:23:14+00:00** Recommendation: Do pass. `committee-passage-favorable`
- **2023-04-24T19:05:24+00:00** Second reading. `reading-2`
- **2023-04-25T19:38:12+00:00** Rules suspended. Carried over to April 26, 2023 Calendar.
- **2023-04-26T19:07:21+00:00** Third reading. Carried by Marsh. Passed. `passage, reading-3`
- **2023-04-27T19:43:55+00:00** President signed. `passage`
- **2023-05-01T17:14:34+00:00** Speaker signed. `passage`
- **2023-04-26T19:08:21+00:00** Vote explanation(s) filed by Morgan.
- **2023-05-08T20:12:01+00:00** Governor signed. `executive-signature`
- **2023-05-16T22:45:00+00:00** Chapter 76, 2023 Laws.
- **2023-05-16T23:00:00+00:00** Effective date, May 8, 2023.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/32b3146e-e2c3-49da-adeb-38a03759b0eb`. Confidence: reported (aggregated from official Oregon legislature records).