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Iowa City amends zoning text to align with recent state law changes, including ADU updates
Summary
Council gave first consideration and voted 7–0 to amend zoning code to comply with state preemptions affecting home occupations, consumer fireworks sales, exterior materials, area variances, and accessory dwelling units (ADUs); the code changes implement statewide requirements and adjust local size and review standards.
The council opened a public hearing and considered a zoning text amendment package intended to bring Iowa City's code into compliance with state law changes enacted since 2022.
Danielle Sisman of Neighborhood and Development Services summarized five primary areas of change: expanded allowances for home occupations (including increased footprint and employee allowances), a state requirement to allow consumer fireworks sales in certain commercial and industrial districts, new cutoffs for material restrictions on small residential buildings (12 or fewer units), a state-prescribed 'practical difficulty' standard for area variances, and new ADU rules. Sisman said the changes mostly implement state preemptions that reduce local discretion and that staff sought the minimum local edits necessary to comply.
On accessory dwelling units, Sisman explained the city adjusted ADU sizing to meet the state's limits (the ADU may not exceed 1,000 square feet or 50% of the principal dwelling, whichever is larger) and removed owner-occupancy and some local discretionary requirements because state law preempted them. She noted the state's definition of 'single-family' can translate to include duplexes and townhomes for ADU eligibility.
Council members asked clarifying questions about fireworks timing and whether the city could retain setback requirements and other dimensional controls; staff said the city can keep overlay district design standards but must allow ADUs in the zones where single-family is permitted. The Planning & Zoning Commission had recommended approval at its December meeting by 5–1.
Council voted, 7–0, to give first consideration to the ordinance amendments.
