Specializing in Tri Valley communities of Pleasanton CA, Ruby Hill, Dublin CA, San Ramon CA, Danville CA, Blackhawk CA, Alamo CA, and Livermore CA. As a realtor, Doug provides expert real estate services for buyers and sellers in the Tri Valley area of California. 680 Homes offers extensive school and community information. Sponsored by Doug Buenz, realtor and top producing real estate agent specializing in homes, estates, and properties in the Tri-Valley Region.