Basement Apartment & ADU Finishing in Eagle Mountain, UT

A second living space inside the home you already own

An accessory dwelling unit, or ADU, is a self-contained home built inside or beside your house. In this part of Utah County, the easiest and most affordable ADU is almost always the basement, because the foundation, walls, and roof already exist. We finish that raw space into a private unit with its own kitchen, bathroom, bedroom, and entrance.

Homeowners build basement apartments for two main reasons. The first is income. A finished rental unit can bring in steady monthly rent in a market where housing is tight and demand is high. The second is family. A basement suite gives aging parents or an adult child a private place to live while staying close, which many growing families want as they plan for the years ahead.

What goes into a finished basement apartment

A true apartment is more than a finished basement with a sink. To live in it legally and rent it safely, the unit needs each of these pieces built to code:

• Full kitchen with cabinets, counters, a sink, and hookups for a range, fridge, and microwave.
• Bathroom with a shower or tub, a vanity, and proper venting.
• Bedrooms with egress windows so anyone sleeping below grade has a safe, code-legal way out.
• Separate entrance, either a walkout door or a private stairwell, so the tenant has their own way in and out.
• Fire separation between the unit and the rest of the house, which the building code requires for a rental.
• Independent comfort, including its own heating, cooling, and often a separate laundry hookup.

Cost, timeline, and permits

A basement apartment typically runs about $90,000 to $160,000 or more, depending on the kitchen, the number of rooms, and how much work the separate entrance and egress windows take. Most builds run eight to twelve weeks once the permit clears, since the added plumbing, electrical, and inspections take more time than a simple open finish. We pull the city permit, schedule every inspection, and keep the paperwork clean so your unit is legal and ready to appraise or rent. You can compare this with our full basement finishing pricing on the home page.

Adding a bathroom is one of the larger line items in any apartment build. If you want to see how that part works on its own, read our basement bathroom page.