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---
type: "Bill"
title: "Planning and Zoning Law: housing development projects."
description: "The Planning and Zoning Law requires a city or county to adopt a general plan for land use development within its boundaries that includes, among other things, a housing element. The law also requires the Department of Housing and Community Development to notify the city, county, or city and county, and authorizes the department to notify the Attorney General, that the city, county, or city and county is in violation of state law if the department finds that the housing element or an amendment to that element, or any specified action or failure to act, does not substantially comply with the law as it pertains to housing elements or that any local government has taken an action in violation of certain housing laws."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20212022"
identifier: "SB 478"
citation: "California SB 478 (20212022)"
classification: ["bill"]
subjects: ["Planning and Zoning Law: housing development projects."]
status: "enacted"
primary_sponsors: ["Wiener"]
version_count: 10
action_count: 36
vote_count: 10
first_action: "2021-02-17"
last_action: "2021-09-28"
source: "openstates"
source_identifier: "ocd-bill/e4a0e258-b5c0-44d4-a793-abf3d72ed33a"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202120220SB478"
source_hash: "974d4ce42bd804caec3b55da67fd28629fe05d2fc2fc5ee9d0fe2d8b5bc275b8"
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 SB 478 (20212022) — Planning and Zoning Law: housing development projects.
The Planning and Zoning Law requires a city or county to adopt a general plan for land use development within its boundaries that includes, among other things, a housing element. The law also requires the Department of Housing and Community Development to notify the city, county, or city and county, and authorizes the department to notify the Attorney General, that the city, county, or city and county is in violation of state law if the department finds that the housing element or an amendment to that element, or any specified action or failure to act, does not substantially comply with the law as it pertains to housing elements or that any local government has taken an action in violation of certain housing laws.
## Version chain
The bill's text revisions, in order — the diff chain from filing to enrollment.
1. **02/17/21 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47899INT)
2. **04/12/21 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47898AMD)
3. **05/20/21 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47897AMD)
4. **06/24/21 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47896AMD)
5. **07/05/21 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47895AMD)
6. **08/30/21 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47894AMD)
7. **09/02/21 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47893AMD)
8. **09/28/21 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47891CHP)
9. **SB478** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202120220SB478)
10. **09/13/21 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202120220SB478&version=20210SB47892ENR)
## Votes
- Do pass, but first be re-referred to the Committee on [Appropriations] — **71** (pass) · upper
- Placed on suspense file — **70** (pass) · upper
- Do pass as amended. — **114** (pass) · lower
- 3rd Reading — **295** (pass) · upper
- SB 478 Wiener Senate Third Reading By Carrillo — **5614** (pass) · lower
- Unfinished Business SB478 Wiener et al. Concurrence — **306** (pass) · upper
- Do pass as amended and be re-referred to the Committee on [Local Government] — **71** (pass) · lower
- Do pass as amended, but first amend, and re-refer to the Committee on [Housing] — **41** (pass) · upper
- Do pass as amended and be re-referred to the Committee on [Appropriations] — **52** (pass) · lower
- Do pass as amended — **61** (pass) · upper
## Sponsors
- Wiener — primary (person)
- Carrillo — coauthor (person)
## Timeline
The legislative action history — every referral, reading, and vote.
- **2021-02-17** Introduced. Read first time. To Com. on RLS. for assignment. To print. `introduction, reading-1`
- **2021-02-18** From printer. May be acted upon on or after March 20.
- **2021-02-22** Art. IV. Sec. 8(a) of the Constitution dispensed with.
- **2021-02-22** (Ayes 32. Noes 4.)
- **2021-02-22** Joint Rule 55 suspended. (Ayes 32. Noes 4. Page 272.)
- **2021-02-25** Referred to Coms. on GOV. & F. and HOUSING. `referral-committee`
- **2021-03-24** Set for hearing April 8.
- **2021-04-08** From committee: Do pass as amended and re-refer to Com. on HOUSING. (Ayes 4. Noes 1. Page 728.) (April 8). `amendment-passage, committee-passage, committee-passage-favorable`
- **2021-04-12** Read second time and amended. Re-referred to Com. on HOUSING. `amendment-passage, reading-1, reading-2, referral-committee`
- **2021-04-15** Set for hearing April 29.
- **2021-04-29** From committee: Do pass and re-refer to Com. on APPR. (Ayes 7. Noes 1. Page 987.) (April 29). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2021-05-04** Set for hearing May 10.
- **2021-05-10** May 10 hearing: Placed on APPR suspense file.
- **2021-05-14** Set for hearing May 20.
- **2021-05-20** From committee: Do pass as amended. (Ayes 6. Noes 1. Page 1193.) (May 20). `amendment-passage, committee-passage, committee-passage-favorable`
- **2021-05-20** Read second time and amended. Ordered to second reading. `amendment-passage, reading-1, reading-2`
- **2021-05-24** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2021-05-26** Read third time. Passed. (Ayes 29. Noes 5. Page 1258.) Ordered to the Assembly. `passage, reading-1, reading-3`
- **2021-05-26** In Assembly. Read first time. Held at Desk. `reading-1`
- **2021-06-03** Referred to Coms. on H. & C.D. and L. GOV. `referral-committee`
- **2021-06-23** From committee: Do pass as amended and re-refer to Com. on L. GOV. (Ayes 7. Noes 1.) (June 22). `amendment-passage, committee-passage, committee-passage-favorable`
- **2021-06-24** Read second time and amended. Re-referred to Com. on L. GOV. `amendment-passage, reading-1, reading-2, referral-committee`
- **2021-07-01** From committee: Do pass as amended and re-refer to Com. on APPR. (Ayes 5. Noes 2.) (June 30). `amendment-passage, committee-passage, committee-passage-favorable`
- **2021-07-05** Read second time and amended. Re-referred to Com. on APPR. `amendment-passage, reading-1, reading-2, referral-committee`
- **2021-08-19** August 19 set for first hearing. Placed on suspense file.
- **2021-08-26** From committee: Do pass as amended. (Ayes 11. Noes 4.) (August 26). `amendment-passage, committee-passage, committee-passage-favorable`
- **2021-08-30** Read second time and amended. Ordered to second reading. `amendment-passage, reading-1, reading-2`
- **2021-08-31** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2021-09-02** Read third time and amended. `amendment-passage, reading-1, reading-3`
- **2021-09-02** Ordered to third reading.
- **2021-09-08** Read third time. Passed. (Ayes 56. Noes 14. Page 2916.) Ordered to the Senate. `passage, reading-1, reading-3`
- **2021-09-08** In Senate. Concurrence in Assembly amendments pending.
- **2021-09-09** Assembly amendments concurred in. (Ayes 30. Noes 6. Page 2557.) Ordered to engrossing and enrolling. `amendment-passage, committee-passage-favorable`
- **2021-09-17** Enrolled and presented to the Governor at 1:30 p.m.
- **2021-09-28** Approved by the Governor. `executive-signature`
- **2021-09-28** Chaptered by Secretary of State. Chapter 363, Statutes of 2021. `became-law`
## Source
OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/e4a0e258-b5c0-44d4-a793-abf3d72ed33a`. Confidence: reported (aggregated from official California legislature records).