The Planning and Zoning Law provides for the creation of an accessory dwelling unit by local ordinance, or, if a local agency has not adopted an ordinance, by ministerial approval, in accordance with specified standards. The law requires a local agency to submit an accessory dwelling unit ordinance to the Department of Housing and Community Development within 60 days after adoption. The law authorizes the department to submit written findings to a local agency as to whether the ordinance complies with the standards. If the department finds that the ordinance does not comply with the standards, the law requires the department to provide a local agency reasonable time, no longer than 30 days, to respond to its findings. If the local agency does not amend its ordinance in response to those findings or does not adopt a resolution with findings explaining the reason the ordinance complies with the standards and addressing the department's findings, the law requires the department to notify the local agency and authorizes the department to notify the Attorney General that the local agency is in violation of state law.
California SB 9 (20252026) — Accessory Dwelling Units: ordinances.
The Planning and Zoning Law provides for the creation of an accessory dwelling unit by local ordinance, or, if a local agency has not adopted an ordinance, by ministerial approval, in accordance with specified standards. The law requires a local agency to submit an accessory dwelling unit ordinance to the Department of Housing and Community Development within 60 days after adoption. The law authorizes the department to submit written findings to a local agency as to whether the ordinance complies with the standards. If the department finds that the ordinance does not comply with the standards, the law requires the department to provide a local agency reasonable time, no longer than 30 days, to respond to its findings. If the local agency does not amend its ordinance in response to those findings or does not adopt a resolution with findings explaining the reason the ordinance complies with the standards and addressing the department's findings, the law requires the department to notify the local agency and authorizes the department to notify the Attorney General that the local agency is in violation of state law.
Version chain
The bill's text revisions, in order — the diff chain from filing to enrollment.
Unfinished Business SB9 Arreguín et al. Concurrence — 31–3 (pass) · upper
3rd Reading — 28–4 (pass) · upper
Do pass as amended — 5–0 (pass) · upper
Do pass as amended, but first amend, and re-refer to the Committee on [Local Government] — 10–1 (pass) · upper
SB 9 Arreguín Senate Third Reading By Carrillo — 62–2 (pass) · lower
Do pass. — 9–0 (pass) · lower
Do pass as amended and be re-referred to the Committee on [Local Government] — 9–0 (pass) · lower
Sponsors
Arreguín — primary (person)
McNerney — coauthor (person)
Timeline
The legislative action history — every referral, reading, and vote.
2024-12-02 Introduced. Read first time. To Com. on RLS. for assignment. To print. introduction, reading-1
2024-12-03 From printer. May be acted upon on or after January 2.
2025-01-29 Referred to Coms. on HOUSING and L. GOV. referral-committee
2025-04-04 Set for hearing April 22.
2025-04-22 Set for hearing May 7 in L. GOV. pending receipt.
2025-04-23 From committee: Do pass as amended and re-refer to Com. on L. GOV. (Ayes 10. Noes 1. Page 831.) (April 22). amendment-passage, committee-passage, committee-passage-favorable
2025-04-24 Read second time and amended. Re-referred to Com. on L. GOV. amendment-passage, reading-1, reading-2, referral-committee
2025-04-28 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
2025-05-07 From committee: Do pass as amended. (Ayes 5. Noes 0. Page 1038.) (May 7). amendment-passage, committee-passage, committee-passage-favorable
2025-05-08 Read second time and amended. Ordered to third reading. amendment-passage, reading-1, reading-2
2025-05-28 Read third time. Passed. (Ayes 28. Noes 4. Page 1270.) Ordered to the Assembly. passage, reading-1, reading-3
2025-05-28 In Assembly. Read first time. Held at Desk. reading-1
2025-06-05 Referred to Coms. on H. & C.D. and L. GOV. referral-committee
2025-06-18 From committee: Do pass as amended and re-refer to Com. on L. GOV. (Ayes 9. Noes 0.) (June 18). amendment-passage, committee-passage, committee-passage-favorable
2025-06-19 Read second time and amended. Re-referred to Com. on L. GOV. amendment-passage, reading-1, reading-2, referral-committee
2025-07-17 From committee: Do pass. (Ayes 9. Noes 0.) (July 16). committee-passage, committee-passage-favorable
2025-08-18 Read second time. Ordered to third reading. reading-1, reading-2
2025-08-28 Read third time. Passed. (Ayes 62. Noes 2. Page 2771.) Ordered to the Senate. passage, reading-1, reading-3
2025-08-28 In Senate. Concurrence in Assembly amendments pending.
2025-09-03 Assembly amendments concurred in. (Ayes 31. Noes 3. Page 2424.) Ordered to engrossing and enrolling. amendment-passage, committee-passage-favorable
2025-09-09 Enrolled and presented to the Governor at 2 p.m.
2025-10-10 Approved by the Governor. executive-signature
2025-10-10 Chaptered by Secretary of State. Chapter 510, Statutes of 2025. became-law
Source
OpenStates / OpenCivicData bulk snapshot 2026-07-01; origin ocd-bill/be0b4412-6dd7-47b4-b825-ed011140b4d7. Confidence: reported (aggregated from official California legislature records).
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