Ames HPC adopts code changes to align accessory dwelling unit rules with new state law

The Ames Historic Preservation Commission voted unanimously on June 9 to adopt Alternative 1, approving revisions to local rules governing accessory dwelling units so the city can comply with new state legislation that takes effect July 1.

The change was driven by state law that, according to city staff, prohibits local regulations that treat accessory dwelling units differently than single-family homes for matters such as height, setbacks and density. “The city last year adopted new accessory dwelling unit regulations,” said Ray, a city staff member, “and earlier this year, the state passed new legislation that preempts or overrode our requirements. We are now required to change everything by July 1.”

Commissioners were told the state law sets a maximum size for ADUs of 1,000…