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Council adopts ordinance to allow detached ADUs with guardrails to meet state mandate
Summary
The Herriman City Council unanimously approved an amendment to the Land Development Code permitting detached accessory dwelling units (ADUs) on owner-occupied single-family lots, aligning city rules with recently enacted state law while imposing local safeguards including one ADU per lot and utility-extension requirements.
Herriman — The Herriman City Council voted unanimously to amend the city’s Land Development Code to permit detached accessory dwelling units (ADUs) on owner-occupied single-family lots, a change staff and council said is required by recent state legislation.
Staff presenter Michael told council the draft consolidates internal and detached ADU rules, implements elements of the city’s moderate-income housing plan and brings the code into compliance with Senate Bill 284. The ordinance sets a limit of one ADU per allowable lot, requires extensions from existing utility lines to discourage road cuts, and retains the city’s authority to set impact fees after a supporting study.
Council members debated enforcement and practical constraints during the public discussion. One council member asked whether off-street parking required by the code must be used; staff said the code requires two off-street spaces but acknowledged enforcement typically focuses on whether parking is blocking infrastructure or otherwise illegal. Other members raised sewer and utility constraints on smaller lots and described the proposal as a cautious, phased approach.
Several council members said the proposal balances state requirements with local concerns. Council member comments indicated support for beginning with a 10,000-square-foot minimum lot size and revisiting the threshold if the pilot shows the city can safely permit smaller lots.
Motion and outcome: A motion to adopt the ordinance (cited in the transcript as ordinance number 2026 number 11) was made by Council Member Teddy, seconded by Jared, and carried by unanimous roll-call vote.
Why it matters: The change implements state-mandated ADU permission while preserving local standards intended to protect streets, utilities and neighborhood character. Staff noted that requiring utility extension rather than new road cuts is intended to reduce infrastructure disruption.
Next steps: Staff will apply current fee schedules for ADU permits pending any future impact-fee study; council directed staff to track ADU permits per an earlier council request.
Quotes: "This implements an element of our moderate income housing plan and keeps us compliant with the state," Michael said during the presentation.
"I think we landed in a good place on this," a council member said when the motion was called.
