Adu services — Sunnyvale, CA
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
ADU services simplify the process of adding extra living space to your lot. Whether you are looking to create a rental unit for extra income or a private space for family members, these services handle the architectural drawings, engineering, and city approvals required by your local jurisdiction. You should reach out for these services when you have a clear goal for your backyard space but need expert help turning that vision into a permitted, livable structure.
Frequently asked in Sunnyvale
What are the main things to know about accessory dwelling units in Sunnyvale?
How much does building an ADU typically cost in California?
What are the rules for adding a mother-in-law suite in Sunnyvale?
What's the process for getting an ADU permit in Sunnyvale?
How can I finance an ADU project in Sunnyvale?
Who are the best accessory dwelling unit builders near me in Sunnyvale?
How do I get an estimate for an ADU in Sunnyvale?
Also serving nearby: Santa Clara · Burbank · Fremont · San Jose · Hayward
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Sunnyvale — population 151,967; about 6,888 residents per square mile across 22.1 sq mi. ZIP codes covered include 94085, 94086, 94087, 94088, 94089.
Neighborhoods served in Sunnyvale: Cherry Orchard, Fairwood, Lakewood, Ortega, Playa Del Ray — and every surrounding area.
Areas we serve
Browse by state, then city.