Sun Prairie, WI Home Business: Zoning & Home Occupation Permits (2026)

140(19) treats a home occupation as a special use citywide rather than something automatically allowed with a business license. The threshold standards in subsection (b) apply in every zoning district: the business cannot be conducted on a porch, deck, patio or other unenclosed portion of the dwelling, and no accessory structure except the garage may be used for anything but storage. Floor area is capped at twenty-five percent of the home's total living area, excluding the garage and porch, whether that space is used for the occupation itself or for storing goods from a business run elsewhere.

050(B), and no on-site production of a kind normally restricted to industrial districts is allowed. Staffing is limited to the resident operator plus no more than one other employee, part-time or full-time, and at most two home occupations may run out of a single-family home, or one out of an attached dwelling. Two off-street parking spaces reserved for business use are required on-site. 050 rather than the ordinary special-use process, adding a public hearing before the plan commission and common council.