SSB 3070: Relating to county and city regulation of accessory dwelling units

What it does

Under current law, a county or city shall allow a minimum of one accessory dwelling unit (ADU) on the same lot as a single family residence in accordance with certain conditions. This bill specifies that a county or city shall allow a minimum of one ADU on the same lot as a single family residence within a zoning district where a single family residence is an allowed principal use. Under current law, an ADU shall not exceed 1,000 square feet or percent of the size of the single family residence, whichever is larger.

Senate subcommittee · named January 22, 2026

• Sen. Scott Webster (R) · scott.webster@legis.iowa.gov
• Sen. Dawn Driscoll (R) · dawn.driscoll@legis.iowa.gov
• Sen. Izaah Knox (D) · izaah.knox@legis.iowa.gov

Lobbying · 12 for, 0 against

For: AARP Iowa; American Planning Association Iowa Chapter; Americans For Prosperity; City of Bettendorf; Easterseals Iowa; Greater Des Moines Habitat for Humanity; Habitat for Humanity of Iowa; Home Builders Association of Iowa; Iowa Association of Realtors; Iowa Chapter, American Institute of Architects; Iowa Integrated Health Planning and Advisory Council; Iowa Manufactured Housing Association

In plain words

1. January 22, 2026Filed in the Senate and sent to the Local Government committee
2. January 22, 2026Senate subcommittee named: Webster, Driscoll and Knox
3. February 5, 2026Subcommittee recommended passing it
4. February 17, 2026Approved by the Senate committee, and given a new number: SF 2369