Des Moines applies the Iowa-adopted International Building and Fire Codes under Chapter 8 to require sprinklers in most multi-family and large new construction, with one- and two-family dwellings governed by IRC amendments rather than a citywide mandate.
Under Des Moines Municipal Code Chapter 8 and the state-adopted IBC/IFC framework in Iowa Code Chapter 103A, automatic fire sprinkler systems are required in most new multi-family residential buildings, hotels, assisted living, and commercial occupancies above defined thresholds. Townhomes of four or more attached units typically require sprinklers under the adopted IRC/IBC. One- and two-family detached dwellings are not required to have sprinklers under Iowa amendments to the IRC, though builders may install them voluntarily. Existing buildings undergoing major renovations or change of occupancy may trigger sprinkler retrofit requirements. The Des Moines Fire Marshal reviews and inspects sprinkler systems.
Constructing a regulated occupancy without required sprinklers, disabling existing systems, or failing required annual inspections can lead to stop-work orders, occupancy denial, and fines.
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