Local adu — 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
How fast can an ADU be built in Santa Maria?
What are the rules for accessory dwelling units in California, specifically Santa Maria?
What is the cost to build an accessory dwelling unit in Santa Maria?
What does accessory dwelling unit mean for my property in Santa Maria?
What are the best accessory dwelling unit designs for Santa Maria's climate?
How do accessory dwelling unit permits work 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, Palmer, Cimarron Hills, Town Center, Pacific Grove — and every surrounding area.
Areas we serve
Browse by state, then city.
California (3)
All of California · Costa Mesa · Jurupa Valley · Santa Maria