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.
Draper requires a building permit for basement finishes through its own building department, with standard rough, insulation, and final inspections. Salt Lake County cities run their own accessory-apartment rules — we confirm Draper's current requirements for your address during design.
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. Larger Draper footprints make true two-bedroom apartments possible — a different rental class than the typical one-bed basement unit. 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.