Standard finishes run $50–65 per square foot in 2026; upgraded finishes with a second bedroom and wet bar run $65–85; legal basement apartments run $95–120. A typical 900 sq ft finish lands between $45,000 and $58,500. See the full cost guide for line items.
Eagle Mountain explicitly requires a building permit for basement finishes, with plan review and inspections through the city building department. For accessory apartments: one per lot, the owner occupies one of the units, occupants must be family or no more than two unrelated individuals, and the apartment needs its own side or rear entrance with a recorded deed agreement.
In most single-family homes, yes — Utah law requires most cities to allow one internal accessory apartment, subject to city requirements like owner-occupancy, parking, and registration. Eagle Mountain's big lots and newest-in-the-state housing stock make it structurally the corridor's best city for future detached units too — rules updated under 2026 state law. Details on basement apartments.
About six weeks from demo to final inspection for a standard finish; 8–10 weeks for a full apartment. You get the week-by-week schedule in writing before we start.