---
type: "Bill"
title: "California Environmental Quality Act: exemption: junior accessory dwelling units ordinances."
description: "The California Environmental Quality Act (CEQA) requires a lead agency, as defined, to prepare, or cause to be prepared, and certify the completion of an environmental impact report on a project that it proposes to carry out or approve that may have a significant effect on the environment or to adopt a negative declaration if it finds that the project will not have that effect. CEQA also requires a lead agency to prepare a mitigated negative declaration for a project that may have a significant effect on the environment if revisions in the project would avoid or mitigate that effect and there is no substantial evidence that the project, as revised, would have a significant effect on the environment."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20232024"
identifier: "AB 3057"
citation: "California AB 3057 (20232024)"
classification: ["bill"]
subjects: ["California Environmental Quality Act", "exemption", "junior accessory dwelling units ordinances"]
status: "enacted"
primary_sponsors: ["Wilson"]
version_count: 5
action_count: 22
vote_count: 6
first_action: "2024-02-16"
last_action: "2024-08-27"
source: "openstates"
source_identifier: "ocd-bill/e5d9d051-cd9a-400e-8a9f-57a94aa66171"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB3057"
source_hash: "ce0a23178eca745fa438f31ce27f4b2b741b668962f3930aa605f4e82deae233"
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 3057 (20232024) — California Environmental Quality Act: exemption: junior accessory dwelling units ordinances.

The California Environmental Quality Act (CEQA) requires a lead agency, as defined, to prepare, or cause to be prepared, and certify the completion of an environmental impact report on a project that it proposes to carry out or approve that may have a significant effect on the environment or to adopt a negative declaration if it finds that the project will not have that effect. CEQA also requires a lead agency to prepare a mitigated negative declaration for a project that may have a significant effect on the environment if revisions in the project would avoid or mitigate that effect and there is no substantial evidence that the project, as revised, would have a significant effect on the environment.

## Version chain

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

1. **02/16/24 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3057&version=20230AB305799INT)
2. **04/08/24 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3057&version=20230AB305798AMD)
3. **08/27/24 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3057&version=20230AB305796CHP)
4. **AB3057** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB3057)
5. **08/14/24 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3057&version=20230AB305797ENR)

## Votes

- Do pass. To Consent Calendar. — **9–0** (pass) · lower
- Do pass, but first be re-referred to the Committee on [Housing] with the recommendation: To Consent Calendar — **7–0** (pass) · upper
- AB 3057 Wilson Consent Calendar Second Day — **73–0** (pass) · lower
- Consent Calendar 2nd — **38–0** (pass) · upper
- Do pass and be re-referred to the Committee on [Housing and Community Development] with recommendation: To Consent Calendar — **11–0** (pass) · lower
- Do pass and be ordered to the Consent Calendar — **10–0** (pass) · upper

## Sponsors

- Wilson — primary (person)

## Timeline

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

- **2024-02-16** Read first time. To print. `reading-1`
- **2024-02-17** From printer. May be heard in committee March 18.
- **2024-03-11** Referred to Coms. on NAT. RES. and H. & C.D. `referral-committee`
- **2024-04-03** In committee: Hearing postponed by committee.
- **2024-04-08** From committee chair, with author's amendments: Amend, and re-refer to Com. on NAT. RES. Read second time and amended. `amendment-introduction, amendment-passage, reading-1, reading-2`
- **2024-04-09** Re-referred to Com. on NAT. RES. `referral-committee`
- **2024-04-15** Assembly Rule 56 suspended. (Page 4775.)
- **2024-04-15** (Pending re-refer to Com. on H. & C.D.)
- **2024-04-23** From committee: Do pass and re-refer to Com. on H. & C.D. with recommendation: To Consent Calendar. (Ayes 11. Noes 0.) (April 22). Re-referred to Com. on H. & C.D. `committee-passage, committee-passage-favorable, referral-committee`
- **2024-04-24** From committee: Do pass. To Consent Calendar. (Ayes 9. Noes 0.) (April 24). `committee-passage, committee-passage-favorable`
- **2024-04-25** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2024-05-02** Read third time. Passed. Ordered to the Senate. (Ayes 73. Noes 0. Page 5091.) `passage, reading-1, reading-3`
- **2024-05-02** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2024-05-15** Referred to Coms. on E.Q. and HOUSING. `referral-committee`
- **2024-06-05** From committee: Do pass and re-refer to Com. on HOUSING with recommendation: To Consent Calendar. (Ayes 7. Noes 0.) (June 5). Re-referred to Com. on HOUSING. `committee-passage, committee-passage-favorable, referral-committee`
- **2024-07-03** From committee: Do pass. To Consent Calendar. (Ayes 10. Noes 0.) (July 2). `committee-passage, committee-passage-favorable`
- **2024-08-05** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2024-08-12** Read third time. Passed. Ordered to the Assembly. (Ayes 38. Noes 0. Page 5041.). `passage, reading-1, reading-3`
- **2024-08-12** In Assembly. Ordered to Engrossing and Enrolling. `committee-passage`
- **2024-08-19** Enrolled and presented to the Governor at 3 p.m.
- **2024-08-27** Approved by the Governor. `executive-signature`
- **2024-08-27** Chaptered by Secretary of State - Chapter 210, Statutes of 2024. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/e5d9d051-cd9a-400e-8a9f-57a94aa66171`. Confidence: reported (aggregated from official California legislature records).