---
type: "Bill"
title: "Planning and zoning: housing sustainability districts."
description: "(1) 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. Existing law provides for various reforms and incentives intended to facilitate and expedite the construction of affordable housing."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20172018"
identifier: "AB 73"
citation: "California AB 73 (20172018)"
classification: ["bill"]
subjects: ["Planning and zoning: housing sustainability districts."]
status: "enacted"
primary_sponsors: ["Chiu"]
version_count: 8
action_count: 31
vote_count: 10
first_action: "2016-12-16"
last_action: "2017-09-29"
source: "openstates"
source_identifier: "ocd-bill/b1ebb77c-bc73-4dfc-822e-1dcc27b09cc0"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180AB73"
source_hash: "491909756de0643f2065aadcda07f708b4b918733cea40622b9f54b0d1331656"
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 73 (20172018) — Planning and zoning: housing sustainability districts.

(1) 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. Existing law provides for various reforms and incentives intended to facilitate and expedite the construction of affordable housing.

## Version chain

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

1. **12/16/16 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB73&version=20170AB7399INT)
2. **03/28/17 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB73&version=20170AB7398AMD)
3. **05/02/17 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB73&version=20170AB7397AMD)
4. **06/19/17 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB73&version=20170AB7396AMD)
5. **07/13/17 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB73&version=20170AB7395AMD)
6. **09/29/17 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB73&version=20170AB7393CHP)
7. **AB73** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180AB73)
8. **09/19/17 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180AB73&version=20170AB7394ENR)

## Votes

- AB 73 CHIU Concurrence in Senate Amendments — **54–23** (pass) · lower
- Do pass as amended and be re-referred to the Committee on [Appropriations] — **7–1** (pass) · lower
- Do pass and be re-referred to the Committee on [Natural Resources] — **5–0** (pass) · lower
- Do pass — **5–2** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Environmental Quality] — **8–3** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Appropriations] — **5–2** (pass) · upper
- 3rd Reading AB73 Chiu et al. By Roth — **25–10** (pass) · upper
- Do pass. — **12–5** (pass) · lower
- Do pass, but first be re-referred to the Committee on [Governance and Finance] — **4–2** (pass) · upper
- AB 73 CHIU Assembly Third Reading — **56–20** (pass) · lower

## Sponsors

- Chiu — primary (person)
- Berman — coauthor (person)
- Bonta — author (person)
- Caballero — author (person)
- Gloria — coauthor (person)
- Kalra — author (person)
- Mullin — coauthor (person)
- Santiago — coauthor (person)
- Ting — coauthor (person)

## Timeline

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

- **2016-12-16** Introduced. To print. `introduction`
- **2016-12-19** From printer. May be heard in committee January 18.
- **2017-01-04** Read first time. `reading-1`
- **2017-01-19** Referred to Coms. on L. GOV. and NAT. RES. `referral-committee`
- **2017-02-09** Coauthors revised.
- **2017-03-28** 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-2, reading-1`
- **2017-03-29** Re-referred to Com. on L. GOV. `referral-committee`
- **2017-04-06** From committee: Do pass and re-refer to Com. on NAT. RES. (Ayes 5. Noes 0.) (April 5). Re-referred to Com. on NAT. RES. `committee-passage-favorable, committee-passage, referral-committee`
- **2017-05-01** From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 7. Noes 1.) (April 24). `amendment-passage, committee-passage, amendment-introduction`
- **2017-05-02** Read second time and amended. `reading-1, amendment-passage, reading-2`
- **2017-05-03** Re-referred to Com. on APPR. `referral-committee`
- **2017-05-17** In committee: Set, first hearing. Referred to APPR. suspense file. `referral-committee`
- **2017-05-26** From committee: Do pass. (Ayes 12. Noes 5.) (May 26). `committee-passage-favorable, committee-passage`
- **2017-05-30** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2017-06-01** Read third time. Passed. Ordered to the Senate. (Ayes 56. Noes 20. Page 2054.) `reading-3, passage, reading-1`
- **2017-06-05** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2017-06-14** Referred to Coms. on T. & H., EQ. and GOV. & F. `referral-committee`
- **2017-06-19** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on T. & H. `amendment-passage, referral-committee, reading-2, reading-1, amendment-introduction`
- **2017-06-28** From committee: Do pass and re-refer to Com. on EQ. (Ayes 8. Noes 3.) (June 27). Re-referred to Com. on EQ. `committee-passage-favorable, committee-passage, referral-committee`
- **2017-07-06** From committee: Do pass and re-refer to Com. on GOV. & F. (Ayes 4. Noes 2.) (July 5). Re-referred to Com. on GOV. & F. `committee-passage-favorable, committee-passage, referral-committee`
- **2017-07-12** From committee: Do pass and re-refer to Com. on APPR. (Ayes 5. Noes 2.) (July 12). Re-referred to Com. on APPR. `committee-passage-favorable, committee-passage, referral-committee`
- **2017-07-13** 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-passage, referral-committee, reading-2, reading-1, amendment-introduction`
- **2017-07-17** From committee: Do pass. (Ayes 5. Noes 2.) (July 17). `committee-passage-favorable, committee-passage`
- **2017-07-18** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2017-09-15** Read third time. Passed. Ordered to the Assembly. (Ayes 25. Noes 10. Page 2956.). `reading-3, passage, reading-1`
- **2017-09-15** In Assembly. Concurrence in Senate amendments pending.
- **2017-09-15** Assembly Rule 63 suspended. (Page 3507.)
- **2017-09-15** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 54. Noes 23. Page 3507.). `committee-passage-favorable, amendment-passage`
- **2017-09-26** Enrolled and presented to the Governor at 3 p.m.
- **2017-09-29** Approved by the Governor. `executive-signature`
- **2017-09-29** Chaptered by Secretary of State - Chapter 371, Statutes of 2017.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/b1ebb77c-bc73-4dfc-822e-1dcc27b09cc0`. Confidence: reported (aggregated from official California legislature records).