All Roll Calls
Yes: 129 • No: 1
IowaSF 236991st General Assembly (2025–2026)SenateWALLET
A bill for an act relating to county and city regulation of accessory dwelling units. (Formerly SSB 3070.) Effective date: 07/01/2026.
Sponsored By: COMMITTEE ON LOCAL GOVERNMENT
Signed by Governor
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Bill Overview
Analyzed Economic Effects
1 provisions identified: 0 benefits, 0 costs, 1 mixed.
Homeowners can add an accessory unit statewide
Starting July 1, 2026, cities and counties must allow at least one accessory dwelling unit on any single-family lot in zones that allow single-family homes. The ADU must meet state building rules and can be the larger of 1,000 square feet or 50% of your home's gross living area. For that home size, do not count garages, decks, unheated porches, or unfinished basements. HOAs, deed limits, and state historic rules can still restrict or ban ADUs, and historic boards may do so only if they find an ADU would be out of character and record why. Local rules cannot be tougher on common-interest communities than on other single-family lots. A manufactured or mobile ADU must sit on a permanent foundation and be taxed as real property.
Sponsors & Cosponsors
Sponsor
COMMITTEE ON LOCAL GOVERNMENT
Affiliation unavailable
Cosponsors
There are no cosponsors for this bill.
Roll Call Votes
House vote • 3/5/2026
Passed House
Yes: 85 • No: 1
Senate vote • 3/2/2026
Passed Senate
Yes: 44 • No: 0
Actions Timeline
Signed by Governor.
4/9/2026GovernorReported correctly enrolled, signed by President and Speaker, and sent to Governor.
4/9/2026SenateMessage from House.
3/9/2026HouseImmediate message.
3/5/2026legislaturePassed House, yeas 85, nays 1.
3/5/2026HouseSubstituted for HF 2252.
3/5/2026legislatureRead first time, passed on file.
3/2/2026legislatureMessage from Senate.
3/2/2026SenateImmediate message.
3/2/2026legislaturePassed Senate, yeas 44, nays 0.
3/2/2026SenateCommittee report, approving bill.
2/18/2026legislatureIntroduced, placed on calendar.
2/18/2026legislature
Bill Text
As Introduced
Enrolled
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