Fabio
102 lines
8.1 KiB
Markdown
102 lines
8.1 KiB
Markdown
---
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type: "Bill"
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title: "Accessory dwelling units and junior accessory dwelling units."
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description: "Existing law, the Planning and Zoning Law, among other things, provides for the creation by ordinance, or by ministerial approval if the local agency has not adopted an ordinance, of an accessory dwelling unit (ADU) or a junior accessory dwelling unit (JADU) in accordance with specified standards and conditions. Existing law defines the term \"junior accessory dwelling unit\" for these purposes to mean a unit that is no more than 500 square feet in size and contained entirely within a single-family structure."
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jurisdiction: "us/states/ca"
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legislature: "California Legislature"
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session: "20252026"
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identifier: "SB 543"
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citation: "California SB 543 (20252026)"
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classification: ["bill"]
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subjects: ["Accessorydwellingunitsandjunioraccessorydwellingunits"]
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status: "enacted"
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primary_sponsors: ["McNerney"]
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version_count: 9
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action_count: 29
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vote_count: 8
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first_action: "2025-02-20"
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last_action: "2025-10-10"
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source: "openstates"
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source_identifier: "ocd-bill/098f991d-1eec-4c31-ab88-4f4c36b8944c"
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source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260SB543"
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source_hash: "0847d0ed2b61d5398f06fe719a84063f9b77a4e1186167f5109ebf1a2a70fc1c"
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vintage: "2026-07-01"
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source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
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retrieved_at: "2026-07-06"
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confidence: "reported"
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tags: ["legislation", "bill", "us-ca"]
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---
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# California SB 543 (20252026) — Accessory dwelling units and junior accessory dwelling units.
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Existing law, the Planning and Zoning Law, among other things, provides for the creation by ordinance, or by ministerial approval if the local agency has not adopted an ordinance, of an accessory dwelling unit (ADU) or a junior accessory dwelling unit (JADU) in accordance with specified standards and conditions. Existing law defines the term "junior accessory dwelling unit" for these purposes to mean a unit that is no more than 500 square feet in size and contained entirely within a single-family structure.
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## Version chain
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The bill's text revisions, in order — the diff chain from filing to enrollment.
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1. **02/20/25 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54399INT)
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2. **03/25/25 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54398AMD)
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3. **04/09/25 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54397AMD)
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4. **04/23/25 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54396AMD)
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5. **06/19/25 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54395AMD)
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6. **07/08/25 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54394AMD)
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7. **10/10/25 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54392CHP)
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8. **SB543** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260SB543)
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9. **09/04/25 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB543&version=20250SB54393ENR)
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## Votes
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- Do pass, but first be re-referred to the Committee on [Local Government] — **11–0** (pass) · upper
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- Do pass, but first be re-referred to the Committee on [Appropriations] — **7–0** (pass) · upper
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- Do pass and be re-referred to the Committee on [Appropriations] — **10–0** (pass) · lower
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- Do pass. — **15–0** (pass) · lower
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- Do pass as amended and be re-referred to the Committee on [Local Government] — **11–0** (pass) · lower
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- Unfinished Business SB543 McNerney et al. Concurrence — **40–0** (pass) · upper
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- SB 543 McNerney Senate Third Reading By Carrillo — **75–0** (pass) · lower
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- 3rd Reading — **39–0** (pass) · upper
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## Sponsors
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- McNerney — primary (person)
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- Arreguín — coauthor (person)
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## Timeline
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The legislative action history — every referral, reading, and vote.
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- **2025-02-20** Introduced. Read first time. To Com. on RLS. for assignment. To print. `introduction, reading-1`
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- **2025-02-21** From printer. May be acted upon on or after March 23.
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- **2025-03-05** Referred to Com. on RLS. `referral-committee`
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- **2025-03-25** From committee with author's amendments. Read second time and amended. Re-referred to Com. on RLS. `amendment-passage, committee-passage, reading-1, reading-2, referral-committee`
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- **2025-04-02** Re-referred to Coms. on HOUSING and L. GOV. `referral-committee`
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- **2025-04-04** Set for hearing April 22.
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- **2025-04-09** From committee with author's amendments. Read second time and amended. Re-referred to Com. on HOUSING. `amendment-passage, committee-passage, reading-1, reading-2, referral-committee`
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- **2025-04-22** Set for hearing April 30 in L. GOV. pending receipt.
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- **2025-04-23** From committee: Do pass and re-refer to Com. on L. GOV. (Ayes 11. Noes 0. Page 832.) (April 22). Re-referred to Com. on L. GOV. `committee-passage, committee-passage-favorable, referral-committee`
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- **2025-04-23** From committee with author's amendments. Read second time and amended. Re-referred to Com. on L. GOV. `amendment-passage, committee-passage, reading-1, reading-2, referral-committee`
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- **2025-04-30** From committee: Do pass and re-refer to Com. on APPR. (Ayes 7. Noes 0. Page 968.) (April 30). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
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- **2025-05-02** Set for hearing May 12.
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- **2025-05-12** From committee: Be ordered to second reading pursuant to Senate Rule 28.8. `committee-passage, reading-2`
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- **2025-05-13** Read second time. Ordered to third reading. `reading-1, reading-2`
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- **2025-05-27** Read third time. Passed. (Ayes 39. Noes 0. Page 1250.) Ordered to the Assembly. `passage, reading-1, reading-3`
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- **2025-05-28** In Assembly. Read first time. Held at Desk. `reading-1`
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- **2025-06-05** Referred to Coms. on H. & C.D. and L. GOV. `referral-committee`
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- **2025-06-18** From committee: Do pass as amended and re-refer to Com. on L. GOV. (Ayes 11. Noes 0.) (June 18). `amendment-passage, committee-passage, committee-passage-favorable`
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- **2025-06-19** Read second time and amended. Re-referred to Com. on L. GOV. `amendment-passage, reading-1, reading-2, referral-committee`
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- **2025-07-08** From committee with author's amendments. Read second time and amended. Re-referred to Com. on L. GOV. `amendment-passage, committee-passage, reading-1, reading-2, referral-committee`
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- **2025-07-17** From committee: Do pass and re-refer to Com. on APPR. (Ayes 10. Noes 0.) (July 16). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
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- **2025-08-20** From committee: Do pass. (Ayes 15. Noes 0.) (August 20). `committee-passage, committee-passage-favorable`
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- **2025-08-21** Read second time. Ordered to third reading. `reading-1, reading-2`
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- **2025-08-28** Read third time. Passed. (Ayes 75. Noes 0. Page 2773.) Ordered to the Senate. `passage, reading-1, reading-3`
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- **2025-08-28** In Senate. Concurrence in Assembly amendments pending.
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- **2025-09-02** Assembly amendments concurred in. (Ayes 40. Noes 0. Page 2408.) Ordered to engrossing and enrolling. `amendment-passage, committee-passage-favorable`
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- **2025-09-09** Enrolled and presented to the Governor at 2 p.m.
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- **2025-10-10** Approved by the Governor. `executive-signature`
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- **2025-10-10** Chaptered by Secretary of State. Chapter 520, Statutes of 2025. `became-law`
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## Source
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OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/098f991d-1eec-4c31-ab88-4f4c36b8944c`. Confidence: reported (aggregated from official California legislature records).
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