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.
Herriman requires a building permit for basement finishes, with plan review and inspections through the city. Accessory-apartment rules are city-specific and being updated under 2026 state law — we verify current requirements for your address as part of the free 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. Herriman's newer homes make apartment conversions clean: modern panels, accessible plumbing, and layouts that take a separate entrance well. 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.