All Roll Calls
Yes: 138 • No: 7
IowaSF 59291st General Assembly (2025–2026)SenateWALLET
A bill for an act relating to county and city regulation of accessory dwelling units. (Formerly SSB 1182.) Effective date: 07/01/2025.
Sponsored By: COMMITTEE ON LOCAL GOVERNMENT
Signed by Governor
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Bill Overview
Analyzed Economic Effects
5 provisions identified: 3 benefits, 1 costs, 1 mixed.
Faster ADU permits; state rules control
Beginning July 1, 2025, cities and counties must approve ADU permits that meet the law without hearings or discretionary review. Reviews follow the same timeline used for single‑family homes. If denied, officials must give written reasons and how to fix them. Any local rule that conflicts with this ADU law is void; locals can still be more permissive.
Homeowners can add one ADU
Beginning July 1, 2025, every city and county allows one accessory dwelling unit (ADU) on a single‑family lot. The ADU must meet the state building code. Deed limits, HOA rules, or state historic rules can still prohibit it. An ADU cannot be larger than 1,000 square feet or 50% of the main home, whichever is larger.
Lower local costs to add ADUs
Beginning July 1, 2025, cities and counties cannot add extra costs when you build an ADU. No extra parking or fee‑in‑lieu beyond what your house needs. No higher impact fees or special development standards for an ADU. No added street or sidewalk work. No forced new utility lines unless a separate meter cannot be provided.
No stricter ADU appearance or occupancy rules
Starting July 1, 2025, cities and counties cannot make ADU placement or design rules stricter than for the main house. They cannot force matching exteriors or tighter heights, setbacks, or lot coverage. They cannot require the owner to live on‑site or limit ADU tenants by family, job, age, or income. Local ADU rental rules cannot be stricter than state landlord‑tenant law.
Manufactured home ADUs taxed as property
Starting July 1, 2025, a manufactured or mobile home used as an ADU must be on a permanent foundation and converted to real property. It is then assessed and taxed as real estate. This can add one‑time foundation costs and ongoing property taxes.
Sponsors & Cosponsors
Sponsor
COMMITTEE ON LOCAL GOVERNMENT
Affiliation unavailable
Cosponsors
There are no cosponsors for this bill.
Roll Call Votes
House vote • 4/8/2025
Passed House
Yes: 89 • No: 7
Senate vote • 3/25/2025
Passed Senate
Yes: 49 • No: 0
Actions Timeline
Signed by Governor.
5/1/2025GovernorReported correctly enrolled, signed by President and Speaker, and sent to Governor.
5/1/2025SenateExplanation of vote.
4/24/2025legislatureMessage from House.
4/8/2025HouseImmediate message.
4/8/2025legislaturePassed House, yeas 89, nays 7.
4/8/2025HouseSubstituted for HF 947.
4/8/2025legislaturePlaced on calendar under unfinished business.
4/3/2025legislatureRead first time, passed on file.
3/26/2025legislatureMessage from Senate.
3/25/2025SenateImmediate message.
3/25/2025legislaturePassed Senate, yeas 49, nays 0.
3/25/2025SenateCommittee report, approving bill.
3/10/2025legislatureIntroduced, placed on calendar.
3/10/2025legislature
Bill Text
As Introduced
Enrolled
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