Senate Bill 247 mandates that political subdivisions with zoning ordinances must permit at least one accessory dwelling unit (ADU) on each parcel designated for single-family or multi-family residential use. The bill outlines specific prohibitions for these subdivisions, including the inability to charge fees beyond standard building permit fees for ADUs, impose unique dimensional or design requirements for ADUs compared to single-family dwellings, enforce additional parking requirements based on the presence of an ADU, or require separate utility connections for ADUs. Additionally, the bill allows for size limitations on ADUs, stating they cannot exceed 75% of the existing square footage of the primary dwelling on the same parcel.

Furthermore, the bill declares that any covenants or restrictions in deeds that prevent or unreasonably limit the construction or use of ADUs are void and unenforceable. Homeowners associations are also restricted from imposing such limitations unless necessary for public health and safety. The legislation aims to enhance housing availability by reducing barriers to the development of accessory dwelling units, reflecting a legislative intent that private restrictions on ADUs are contrary to public policy.