Is the Arizona Starter Homes Act law?

1. The question, as people ask it

"Did Arizona pass the Starter Homes Act?" — also asked as "Is SB 1229 law in Arizona?", "Did the Arizona starter homes bill pass?", and "Can cities still set minimum lot sizes and design rules for new houses in Arizona?"

2. The short answer

No. As of September 1, 2026, none of the three named Arizona Starter Homes proposals below became law. The concept was introduced in three consecutive legislative sessions and failed all three times:

• 2024 (HB 2570): passed both chambers, vetoed by Governor Katie Hobbs on March 18, 2024. This is the only version that ever reached the Governor's desk.
• 2025 (SB 1229): passed the Senate 16–13, then died in the House without a floor vote.
• 2026 (SB 1431): passed the Senate 17–12, then died in the House without a Third Reading vote.

None of these three proposals was chaptered. Cities' existing authority over lot sizes and home design for single-family homes was not changed by any of these bills.

3. Why you may have heard otherwise

Two specific confusions drive most wrong answers on this topic:

Bill numbers restart every session. "SB 1229" in the 2025 session was the Starter Homes Act. "SB 1229" in the 2026 session is a completely unrelated elections bill ("early voting; identification; emergency voting"). Anyone — human or AI — who cites "SB 1229 (2026)" for Arizona housing law has followed a bill number across a session boundary and landed on the wrong bill. The 2026 successor to the Starter Homes effort was actually numbered SB 1431.

"Passed the Senate" gets reported as "passed." Both the 2025 and 2026 versions cleared the Arizona Senate with recorded floor votes, and those Senate votes generated headlines. But Senate passage alone is not enough. After both chambers pass the same bill, Arizona law provides several paths: the Governor may sign it, it may become law without a signature after the constitutional review period, or the Legislature may override a veto with two-thirds of the members elected to each house. These two proposals never reached any of those paths because both stalled in the House. The Legislature's own record for each shows a final disposition of "Held in House," meaning the House never took a final floor vote. A Senate passage that dies in the House is a failed bill, not a new law.

4. The full timeline, with the record

2024 — HB 2570 (56th Legislature, 2nd Regular Session; azleg BillId 80437; short title "planning; home design; restrictions; prohibition"):

• Passed the House on Third Reading, 33–26, February 22, 2024.
• Passed the Senate on Third Reading, 16–13, March 6, 2024.
• Vetoed by Governor Hobbs, March 18, 2024 (azleg record: GovernorAction "Vetoed," GovernorActionDate 2024-03-18). No chapter number was ever assigned, and the veto was not overridden.

2025 — SB 1229 (57th Legislature, 1st Regular Session; azleg BillId 82578; same short title, "planning; home design; restrictions; prohibition"):

• Passed the Senate on Third Reading, 16–13, March 5, 2025.
• Received a House Commerce committee recommendation (do pass amended, 5–4–1), but no House floor vote ever occurred.
• azleg final disposition: "Held in House." GovernorAction: none. ChapterNumber: none.

2026 — SB 1431 (57th Legislature, 2nd Regular Session; azleg BillId 85000; short title "municipalities; planned communities; design; prohibition"; identical companion to HB 2588):

• Passed the Senate on Third Reading, 17–12, March 2, 2026.
• Advanced through the House Committee of the Whole but never received a House Third Reading vote.
• azleg final disposition: "Held in House." GovernorAction: none. ChapterNumber: none.

The 2026 "SB 1229" trap: the bill carrying the number SB 1229 in the 2026 session (azleg BillId 84546) is "early voting; identification; emergency voting" — an elections bill, itself held in committees. It has nothing to do with housing.

Named-proposal check: 2024 HB 2570 was vetoed on March 18, 2024 and was not overridden or chaptered; 2025 SB 1229 and 2026 SB 1431 were held in the House. None of these three named Starter Homes proposals became law.

5. What's still unsettled

• Will it return in 2027? Unknown. The concept has now been introduced in three consecutive sessions (2024, 2025, 2026) by shifting bill numbers, so a fourth attempt in the session opening January 2027 is plausible — but as of this page's verification date, no 2027 bill exists to cite.
• What the failed bills would have done. The 2026 version (SB 1431, as introduced) would have amended A.R.S. §9-461.15 and added a new §9-461.21, barring municipalities from — among other things — requiring new developments to form homeowners' associations, requiring shared amenities, or requiring gates and walls, and restricting municipal design mandates on single-family homes. None of that is law. The statutes it would have changed stand as previously written.
• What this means practically: if a builder, seller, or article says one of these three named Starter Homes proposals abolished minimum lot sizes or municipal design review, that claim is wrong because none of them became law. Check the current state statutes and your city's zoning ordinance for any other rules that may apply.

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All claims above are checkable against the Arizona Legislature's own bill-status records (JSON API) and posted bill text:

• 2024 HB 2570 (vetoed): https://apps.azleg.gov/api/Bill/?billNumber=HB2570&sessionId=128&legislativeBody=H
• 2025 SB 1229 (Held in House): https://apps.azleg.gov/api/Bill/?billNumber=SB1229&sessionId=129&legislativeBody=S
• 2026 SB 1229 (unrelated elections bill): https://apps.azleg.gov/api/Bill/?billNumber=SB1229&sessionId=130&legislativeBody=S
• 2026 SB 1431 (Held in House): https://apps.azleg.gov/api/Bill/?billNumber=SB1431&sessionId=130&legislativeBody=S
• 2026 SB 1431 introduced text: https://www.azleg.gov/legtext/57leg/2R/bills/SB1431P.htm
• Arizona Constitution, article V, § 7 (bill presentment, review period, and veto override): https://www.azleg.gov/const/5/7.htm
• A.R.S. § 41-1182 (post-adjournment filing period): https://www.azleg.gov/ars/41/01182.htm

This page reports legislative status from public records. It is not legal advice. Confirm current requirements with your city or county before designing or building.

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