Looking for accessory dwelling unit cost in Salt Lake City, UT? Call AccessoryDwellingUnit Direct for a contact a provider — no obligation. Licensed adu builders serve Salt Lake City and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

Total costs are influenced by the complexity of your site, the square footage of the unit, and the specific utility upgrades needed to support a new home. Choosing between a prefab unit and a custom build also changes your bottom line. We provide exact pricing confirmed free on the call.

Frequently asked in Salt Lake City

What are the disadvantages of ADUs?

Some potential disadvantages of ADUs include the initial construction costs and the possibility of reducing your usable backyard space. You may also see an increase in utility bills and property taxes. It's important to weigh these factors carefully.

How much does an ADU cost in Salt Lake City?

What are the rules for ADUs in Utah?

Utah has state laws that encourage ADUs, but specific regulations are typically set at the local city level. Salt Lake City has its own zoning ordinances that dictate requirements for accessory dwelling units, including size, placement, and parking. Consulting local experts is essential.

Is ADU allowed in Salt Lake City?

Yes, ADUs are allowed in Salt Lake City, Utah, provided they meet the city's specific zoning and building codes. Salt Lake City has adopted regulations that permit the construction of accessory dwelling units within defined parameters.

What factors affect ADU cost in Salt Lake City?

Also serving nearby: West Valley City · West Jordan · Sandy · Lehi · Orem

All cities in Utah →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

209,593residents

1,890per sq mile

8ZIP codes served

Serving all of Salt Lake City — population 209,593; about 1,890 residents per square mile across 110.9 sq mi. ZIP codes covered include 84101, 84102, 84103, 84104, 84105, 84106, 84107, 84108.

Neighborhoods served in Salt Lake City: Sugar House, The Avenues, Downtown Salt Lake City, Federal Heights, Capitol Hill — and every surrounding area.