---
type: "Bill"
title: "Tiny homes: temporary sleeping cabins: fire sprinkler requirements."
description: "The Planning and Zoning Law, among other things, provides for the creation of accessory dwelling units by local ordinance, or, if a local agency has not adopted an ordinance, by ministerial approval, in accordance with specified standards and conditions. Existing law prohibits a local agency from requiring an accessory dwelling unit to provide fire sprinklers, if they are not required for the primary residence."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20232024"
identifier: "AB 42"
citation: "California AB 42 (20232024)"
classification: ["bill"]
subjects: ["Tiny homes", "fire sprinkler requirements", "temporary sleeping cabins"]
status: "enacted"
primary_sponsors: ["Ramos"]
version_count: 11
action_count: 32
vote_count: 8
first_action: "2022-12-05"
last_action: "2023-10-10"
source: "openstates"
source_identifier: "ocd-bill/3363b52b-cdd0-42c8-ad1a-06d26dbce644"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB42"
source_hash: "e104e974f21e407f80ef1ec424a015ea57e2338aef259ac4cd6aad38e55887da"
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-ca"]
---

# California AB 42 (20232024) — Tiny homes: temporary sleeping cabins: fire sprinkler requirements.

The Planning and Zoning Law, among other things, provides for the creation of accessory dwelling units by local ordinance, or, if a local agency has not adopted an ordinance, by ministerial approval, in accordance with specified standards and conditions. Existing law prohibits a local agency from requiring an accessory dwelling unit to provide fire sprinklers, if they are not required for the primary residence.

## Version chain

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

1. **12/05/22 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4299INT)
2. **03/30/23 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4298AMD)
3. **04/13/23 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4297AMD)
4. **04/18/23 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4296AMD)
5. **06/08/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4295AMD)
6. **06/21/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4294AMD)
7. **08/14/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4293AMD)
8. **08/21/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4292AMD)
9. **10/10/23 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4290CHP)
10. **AB42** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB42)
11. **09/11/23 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB42&version=20230AB4291ENR)

## Votes

- Do pass and be re-referred to the Committee on [Appropriations] — **8–0** (pass) · lower
- AB 42 Ramos Assembly Third Reading — **78–0** (pass) · lower
- 3rd Reading AB42 Ramos et al. By Blakespear — **40–0** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Appropriations] — **8–0** (pass) · upper
- Do pass. — **15–0** (pass) · lower
- Do pass, but first be re-referred to the Committee on [Governance and Finance] — **11–0** (pass) · upper
- AB 42 Ramos Concurrence in Senate Amendments — **79–0** (pass) · lower
- Do pass as amended and be re-referred to the Committee on [Local Government] — **8–0** (pass) · lower

## Sponsors

- Ramos — primary (person)
- Blakespear — coauthor (person)
- Dahle — coauthor (person)
- Lowenthal — coauthor (person)
- Megan Dahle — coauthor (person)
- Ochoa Bogh — coauthor (person)

## Timeline

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

- **2022-12-05** Read first time. To print. `reading-1`
- **2022-12-06** From printer. May be heard in committee January 5.
- **2023-01-26** Referred to Coms. on H. & C.D. and L. GOV. `referral-committee`
- **2023-03-30** From committee chair, with author's amendments: Amend, and re-refer to Com. on H. & C.D. Read second time and amended. `amendment-introduction, amendment-passage, reading-1, reading-2`
- **2023-04-03** Re-referred to Com. on H. & C.D. `referral-committee`
- **2023-04-12** From committee: Amend, and do pass as amended and re-refer to Com. on L. GOV. (Ayes 8. Noes 0.) (April 12). `amendment-introduction, amendment-passage, committee-passage, referral-committee`
- **2023-04-13** Read second time and amended. `amendment-passage, reading-1, reading-2`
- **2023-04-17** Re-referred to Com. on L. GOV. `referral-committee`
- **2023-04-18** From committee chair, with author's amendments: Amend, and re-refer to Com. on L. GOV. Read second time and amended. `amendment-introduction, amendment-passage, reading-1, reading-2`
- **2023-04-19** Re-referred to Com. on L. GOV. `referral-committee`
- **2023-04-27** From committee: Do pass and re-refer to Com. on APPR. (Ayes 8. Noes 0.) (April 26). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2023-05-10** From committee: Do pass. (Ayes 15. Noes 0.) (May 10). `committee-passage, committee-passage-favorable`
- **2023-05-11** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-05-25** Read third time. Passed. Ordered to the Senate. (Ayes 78. Noes 0. Page 1737.) `passage, reading-1, reading-3`
- **2023-05-26** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2023-06-07** Referred to Coms. on HOUSING and GOV. & F. `referral-committee`
- **2023-06-08** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on HOUSING. `amendment-introduction, amendment-passage, reading-1, reading-2, referral-committee`
- **2023-06-21** From committee: Do pass and re-refer to Com. on GOV. & F. (Ayes 11. Noes 0.) (June 20). Re-referred to Com. on GOV. & F. `committee-passage, committee-passage-favorable, referral-committee`
- **2023-06-21** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on GOV. & F. `amendment-introduction, amendment-passage, reading-1, reading-2, referral-committee`
- **2023-06-27** In committee: Set, first hearing. Hearing canceled at the request of author.
- **2023-07-13** From committee: Do pass and re-refer to Com. on APPR. (Ayes 8. Noes 0.) (July 12). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2023-08-14** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on APPR. `amendment-introduction, amendment-passage, reading-1, reading-2, referral-committee`
- **2023-08-21** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on APPR. `amendment-introduction, amendment-passage, reading-1, reading-2, referral-committee`
- **2023-08-28** From committee: Be ordered to second reading pursuant to Senate Rule 28.8. `committee-passage, reading-2`
- **2023-08-29** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-09-06** Read third time. Passed. Ordered to the Assembly. (Ayes 40. Noes 0. Page 2397.). `passage, reading-1, reading-3`
- **2023-09-06** In Assembly. Concurrence in Senate amendments pending. May be considered on or after September 8 pursuant to Assembly Rule 77.
- **2023-09-07** Assembly Rule 77 suspended. (Page 3011.)
- **2023-09-07** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 79. Noes 0. Page 3036.). `amendment-passage, committee-passage-favorable`
- **2023-09-13** Enrolled and presented to the Governor at 3 p.m.
- **2023-10-10** Approved by the Governor. `executive-signature`
- **2023-10-10** Chaptered by Secretary of State - Chapter 725, Statutes of 2023. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/3363b52b-cdd0-42c8-ad1a-06d26dbce644`. Confidence: reported (aggregated from official California legislature records).