HB 2375 Arizona House · 57th Legislature - Second Regular Session

housing; zoning; historic neighborhoods

HB 2375 requires Arizona cities with over 75,000 residents to allow duplexes, triplexes, fourplexes, and townhomes by January 1, 2026, on single-family lots within one mile of downtown and on at least 20% of new developments over ten acres. It prohibits cities from imposing extra parking requirements, height limits, or special permits that would make these housing types harder to build. The law does not apply to historic districts, airport areas, or rural zones without residential services. Cities failing to comply by 2026 must allow middle housing on all single-family lots without restrictions.

Issues: ✓ Housing

Bill status passed 3 of 5 stages cleared

Introduction

Jan 2026

Committee Review

House Passage

Mar 2026

Senate Passage

Governor

Introduced Jan 22, 2026 Last action Mar 25, 2026

Maddy AI version diff · 1 comparison

What changed between versions

Introduced Version → House Engrossed Version (03/18/2026) · 5 edits · Mar 18, 2026

MODERATE

The bill was reformatted and reorganized to include new provisions for historic preservation, clarifying that middle housing can be built in historic areas if designed to match the surrounding character. It also added specific rules for municipalities that fail to adopt required zoning regulations by the deadline, mandating that middle housing be allowed without limitations in those cases.

Scope change

The scope expanded to explicitly address historic districts, previously excluded from middle housing mandates, by creating a new pathway for their inclusion under specific compatibility conditions.

REQUIREMENT

Added new subsections (E through H) establishing rules for middle housing in historic districts, requiring design compatibility and limiting building height, massing, and setbacks to pre-2025 standards.

Added a requirement that middle housing cannot be built on sites where historic structures were demolished unless the demolition was necessary for public safety and certified by a licensed engineer.

TIMELINE

Added a new consequence for municipalities that fail to adopt required zoning regulations by January 1, 2026, mandating that middle housing be allowed on all single-family lots without limitations.

DEFINITION

Reorganized the definitions section and updated the 'Permitted use' definition to clarify that site plan review is allowed but discretionary approvals like variances are not.

ENFORCEMENT

Added a provision requiring administrative site plan review for historic developments to confirm compliance with standards, while prohibiting public hearings or discretionary approvals.

Floor votes · House Mar 18, 2026

How they voted

31–24

Passed · 5 other

Total votes 60

Mar 18, 2026

D Democratic27

9 Yea 13 Nay 5

48% Nay

R Republican33

22 Yea 11 Nay

66% Yea

Vote distribution

All Yea All Nay Mixed No data

Full legislative history

Actions timeline

Total actions

Key actions

Committee

Amendments

Mar 18, 2026

Lower · Passed

PASSED

lower

Mar 9, 2026

Lower · Passed

DPA

lower

Feb 18, 2026

Lower · Passed

DPA

lower

1 primary · 1 co-sponsor