Commission recommends presenting ADU draft with 11,000-sq-ft threshold after GIS review

Aug 25, 2026

After a Cache County GIS review and internal analysis, the commission agreed to present an ADU ordinance draft to City Council recommending an 11,000-square-foot minimum for detached ADU eligibility; commissioners debated whether an 8,000 threshold would be fair but raised parking, sewer and neighborhood-scale concerns.

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Members of the River Heights Planning Commission reviewed maps and a spreadsheet produced with Cache County GIS showing how many lots would qualify under various ADU minimum-lot-size thresholds. Staff and a GIS analyst identified roughly 470 lots meeting an 11,000-square-foot (0.2515-acre) threshold and estimated that about 65% of the city's lots could take advantage of ADU allowances in some manner.

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