About Us
CONTRUCTION Experts
About 9ADU – A Division of Simply Building Inc.
9ADU is a dedicated subdivision of Simply Building Inc., based at 419 Allan St, Daly City, CA 94014. As a licensed California contractor, we offer professional services in General Building, Plumbing, Flooring, and Floor Covering—with a primary focus on designing and constructing Accessory Dwelling Units (ADUs).
Led by Kiley Gabriel Kaan Ayoso, Simply Building Inc. brings years of hands-on experience, skilled craftsmanship, and a strong commitment to quality in every project.
With a BuildZoom score of 106, we are proud to rank among the top 7% of over 336,000 licensed contractors in California. Our licenses are current and verified by the California State License Board, ensuring your project is handled with expertise and integrity.
Whether you’re expanding your property with an ADU, planning a remodel, or starting new construction, 9ADU by Simply Building Inc. is your trusted partner for dependable, high-quality results.
Contact us today to learn more or request a competitive quote.
500+
Projects done
15 years
experience
Do you accept reservations?
Yes, we accept reservations. Please call us or book online through our website.
What are your operating hours?
We are open from 9 AM to 5 PM, Monday to Friday. We’re closed on Saturday & Sunday. Holiday hours may vary, so please call or check our website for specific information on those dates.
Is parking available?
Yes, we have a parking lot and street parking is also available.
