Starting April 19, 2021, the Department of Safety and Professional Services will resume enforcing a code provision that requires fire sprinkler systems in certain multi-family dwellings.Now, a multi-family dwelling with three or more attached dwelling unites defined exceptions in Wis. Admin. Code SPS § 362.0903

Previously, automatic fire sprinkler systems were required in multi-family dwellings with more than 20 attached dwelling units. 

Read the full press release from DSPS here.