Cassidy Investors LLC has sold a Vista medical office building for $7.25 million, real estate management firm The Heritage Group said Monday.

The Heritage Group's Mark Hoekstra and Rocco Cortese represented the buyer, 145 Thunder Drive LLC, named after the building’s address. The 16,486-square-foot property is leased to United Healthcare and is located across from Tri-City Medical Center. It will be managed and marketed by The Heritage Group.

The seller was represented by Ben Tashakorian and Scott Hilmen of Marcus & Millichap.