Accessory dwelling unit construction — Santa Maria, CA
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.
Frequently asked in Santa Maria
Where can I find an accessory dwelling unit contractor near me in Santa Maria?
What are the requirements for ADU housing in Santa Maria?
What can I expect regarding accessory dwelling unit rental income in Santa Maria?
What is the process for ADU construction in Santa Maria?
Are there ADU companies that specialize in Santa Maria projects?
What are the benefits of homes with mother-in-law suites in Santa Maria?
What's the cost to build an accessory dwelling unit in Santa Maria?
Also serving nearby: San Buenaventura Ventura · Bakersfield · Oxnard · Thousand Oaks · Simi Valley
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Santa Maria — population 109,987; about 4,821 residents per square mile across 22.8 sq mi. ZIP codes covered include 93454, 93455, 93456, 93457, 93458.
Neighborhoods served in Santa Maria: Old Town Santa Maria, The Bluffs, Cimarron, Alondra — and every surrounding area.
Areas we serve
Browse by state, then city.
California (3)
All of California · Costa Mesa · Jurupa Valley · Santa Maria