6059 Cornerstone Court West
Photo courtesy of Buchanan Street Partners

6059 Cornerstone Court West Photo courtesy of Buchanan Street Partners

A Sorrento Valley office building has been sold for $20.6 million.

Buchanan Street Partners based in Newport Beach sold the 51,690 square-foot building at 6059 Cornerstone Court West to a private investor who was not identified.

The building in the Cornerstone Heights Corporate Center is fully leased to Verimatrix, a company that specializes in content security for digital television services.

Joe Winkelmann, senior executive vice president of Colliers International, represented the buyer.

Buchanan Street Partners was represented by Matt Pourcho, Gary Stache, Anthony DeLorenzo and Bryan Johnson of CBRE.

Buchanan Street Partners acquired the property in December 2014 for $23.1 million in a two-building deal that included the adjacent 5959 Cornerstone Court West.