Backyard accessory dwelling unit — Santa Clara, 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.
About this service
This is a detached unit built on your property, separate from your main home. It is a practical solution if you have extra yard space and want to add living quarters for family, guests, or tenants. These structures offer privacy while keeping you close to your primary residence.
Frequently asked in Santa Clara
What's the process for an accessory dwelling unit rental in Santa Clara?
How can I build an affordable accessory dwelling unit in Santa Clara?
What goes into accessory dwelling unit construction in Santa Clara?
What's involved in ADU building in Santa Clara?
What is the estimated cost to build an accessory dwelling unit in Santa Clara?
How do I get an ADU quote in Santa Clara?
What are accessory dwelling units (ADUs) and how do they work in Santa Clara?
Also serving nearby: Sunnyvale · Burbank · Fremont · San Jose · Hayward
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Santa Clara — population 131,062; about 7,170 residents per square mile across 18.3 sq mi. ZIP codes covered include 95050, 95051, 95052, 95053, 95054, 95055, 95056.
Neighborhoods served in Santa Clara: Franklin, Mission Park, Old Quad, Rivermark, Agnew — and every surrounding area.
Areas we serve
Browse by state, then city.