Quality Construction Guaranteed: (925) 283-8122



Serving the San Francisco Bay Area, and beyond...

  ​Concept Builders has been in the construction business for over 35 years, established in Hawaii and relocated to California in 2004.

Don Runnals, Owner and President, holds Certificates of Achievement in Law and Business Management and General Building Construction from the National Assessment Institute.  He also holds a BA in Construction Management from University of Hawaii.

Concept Builders is a fully accredited member of the Better Business Bureau with an
A+ rating.

Contractor License #842563

​Click here for California State Li​censing Board Website

The Concept Builders Philosophy
Pleasing the customer is our number one priority.  We complete our jobs in a timely fashion, communicate clearly with our clients and follow through with what we promise to do. Should a problem arise, we address it immediately.  Our goal is for the project to flow smoothly, ensuring that in the end, all have shared a positive experience.

Concept Builders, Contractors  General, Lafayette, CA

(Lafayette, Lamorinda, East Bay, Contra Costa County and more...)

Remodeling and Home Design