Modular accessory dwelling unit — St. George, UT
Last updated: September 24, 2026
What affects the price
Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.
About this service
A modular ADU is a home built in a controlled factory setting and then transported to your property to be placed on a permanent foundation. This method is often faster than traditional stick-built construction because the structure is built off-site while your foundation is prepared. You should choose this if you want a quicker build timeline and less disruption to your backyard. Factors like site accessibility for cranes impact the final price. Exact pricing confirmed free on the call.
Frequently asked in St. George
What factors influence the cost of building an ADU in St. George?
How do I find a reputable company for ADU construction in St. George?
What are the typical dimensions for an accessory dwelling unit in St. George?
What kind of services are involved in building an ADU in St. George?
What makes an ADU the 'best' choice for a St. George homeowner?
Are homes with in-law suites common or practical in St. George?
What specialized accessory dwelling unit services are available in St. George?
Also serving nearby: North Las Vegas · Henderson · Las Vegas · Peoria · Provo
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of St. George — population 104,578; about 1,355 residents per square mile across 77.1 sq mi.
Neighborhoods served in St. George: Downtown St. George, Green Valley, Kayenta, Ivins — and every surrounding area.
Areas we serve
Browse by state, then city.