Janesville, WI Home Business: Signage Rules (2026)

Home occupations in Janesville operate under a strict no-visibility rule rather than a sign-size limit. Sec. 42-275(a)(3) states that the exterior of the home or yard does not display or indicate any evidence of the home occupation, which the Building Division treats as a complete bar on outdoor signs, window displays, or other exterior markers advertising the business, not merely a size or lighting cap. That sits alongside the noise, odor and interference ban in subsection (a)(4), reinforcing that a home occupation is meant to be invisible from the street.

This is a sharper standard than the code applies to a bed and breakfast establishment, which Sec. 42-440(b)(1)7 allows to post signage up to four square feet with no illumination, because a bed and breakfast is treated as its own conditional use rather than a home occupation. Every home occupation still needs a Building Division permit under Sec. 42-275(c) before starting, and the application is where staff confirm there is no exterior signage plan on file. A homeowner who wants any visible identification for a home-based business, even a small nameplate, falls outside what Sec. 42-275 allows and would need to pursue a different, non-home-occupation classification for the property instead.