Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit 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

The expense of building an ADU varies based on site preparation, whether you need to run new sewer or electrical lines, and the level of interior customization you choose. Larger custom builds naturally require more materials and labor than simpler conversions. We provide exact pricing confirmed free on the call.

Frequently asked in Salt Lake City

What are the disadvantages of ADUs in Salt Lake City?

Potential downsides include the initial construction costs and the time needed to complete the project. You'll also want to consider ongoing maintenance and any impact on your property's utilities. A local pro can help you weigh these factors for your Salt Lake City ADU.

How much does an ADU cost in Salt Lake City?

What are the rules for ADUs in Salt Lake City?

Is an ADU allowed in Salt Lake City?

Yes, Accessory Dwelling Units are permitted in Salt Lake City, and the city has regulations in place to facilitate their development. A professional can confirm that your property meets all the necessary requirements for building an ADU.

What's the process for building an ADU in Salt Lake City?

The process typically involves design, obtaining permits from the city, and then proceeding with construction, including site preparation and utility connections. Final inspections are required before occupancy. Local pros in Salt Lake City manage these steps efficiently.

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

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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, Federal Heights, Liberty Wells — and every surrounding area.