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Mayfield adopts ordinance regulating internal accessory dwelling units
Summary
The Mayfield Town Council adopted Ordinance 2026-1 establishing standards for internal accessory dwelling units (IADUs), requiring owner-occupancy, long-term rental only, septic feasibility approval from Central Utah Health Department, parking and building-code compliance.
Mayfield’s town council voted Feb. 11 to adopt Ordinance 2026-1, which establishes regulations for internal accessory dwelling units (IADUs) in single‑family residences.
An unidentified council member read findings and definitions from the ordinance, citing Utah state code requiring municipalities allow IADUs within specified parameters. The ordinance defines an IADU as a self-contained dwelling unit located entirely within the footprint of an existing single‑family residence and requires owner-occupancy of the primary dwelling, a limit of one IADU per lot, and long‑term rental only (short‑term rentals are prohibited).
Development and health requirements in the ordinance include compliance with building, electrical, plumbing and fire codes adopted by Mayfield, and a septic system feasibility approval from the Central Utah Health Department prior to IADU approval. The ordinance requires two additional off‑street parking spaces for an IADU, maintains the exterior appearance of the dwelling, prohibits separate utility meters unless expressly approved, and designates the secondary unit as "unit B" with the same street address as the primary residence.
Council action: After discussion and an opportunity for staff to finish the presentation, a council member moved to adopt the ordinance and a second was recorded; all members present voted in favor and the motion passed. The ordinance is effective upon passage, approval and posting, with a stated effective date in February 2026.
Why it matters: The ordinance implements state requirements while setting local design, parking, health and owner‑occupancy standards intended to preserve neighborhood character and ensure long‑term residential occupancy.
Next steps: Staff will process permits and septic feasibility reviews in accordance with the ordinance; any applicant must obtain a zoning permit from Mayfield and a building permit from San Mateo County (as referenced in the ordinance) before establishing an IADU.
