Iowa City does not require a permit to hold an occasional residential garage or yard sale. Garage sales must be conducted on residentially zoned property under Title 14 (Zoning Code), are limited to reasonable daytime hours, and garage-sale signs must be on the seller's own property — posting signs on utility poles, traffic signals, planting strips, or public right-of-way is prohibited under the City's sign regulations and signs are removed by Public Works. Iowa state sales tax does not apply to occasional household sales under Iowa Code Section 423.2.
Iowa City has not adopted a stand-alone garage-sale permit. The Iowa City Licenses and Permits resources at https://www.icgov.org do not list a garage-sale permit, and the Iowa City Code of Ordinances at https://codelibrary.amlegal.com/codes/iowacityia/latest/iowacity_ia/0-0-0-1 does not require advance registration for occasional residential sales. The operational rules residents must follow come from Title 14 (Zoning Code / Unified Development Code): garage sales are permitted accessory uses on residentially zoned property only, must be conducted during reasonable daytime hours, and may not be operated as ongoing retail. Garage-sale signs are permitted on the seller's own property only. Title 14 sign regulations prohibit signs in the public right-of-way, on utility poles, traffic signals, light poles, or planting strips — those signs are removed by Iowa City Public Works or Streets Division and the responsible party can be cited. Iowa state sales tax does not apply to occasional household sales by individuals who are not in the business of selling under Iowa Code Section 423.2 (https://www.legis.iowa.gov/docs/code/423.pdf) and Iowa Administrative Code 701 Chapter 211 (isolated/casual sale exception). Sellers handling firearms, alcohol, or controlled substances at a garage sale remain subject to all federal, state, and local laws on those items. Neighboring jurisdictions including Coralville, North Liberty, and University Heights have separate municipal rules.
Holding an occasional residential garage sale in Iowa City is not a violation in itself. Sign violations under Title 14 — signs in the public right-of-way, on utility poles, or off the seller's own property — are municipal infractions and the signs are removed by Iowa City Public Works. Sales held in non-residential zoning districts or operated continuously as ongoing retail can be cited as Title 14 zoning violations. Recurring sales of inventory the seller did not personally use can be treated as unlicensed retail subject to Iowa Department of Revenue sales-tax registration and back-tax assessment.
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