Culminating a yearslong process, San Mateo Union High School District officials agreed to sell the former Crestmoor High School campus in San Bruno to a home building company for as much as $125 million. The district Board of Trustees voted 4-0, with new Trustee Ligia Andrade Zuniga abstaining, to approve a sales agreement with D.R. Horton, which will acquire the 40-acre campus to build between 120 and 200 homes at 300 Piedmont Ave. Recognizing she was not on the board while officials spent years advancing toward agreeing to sell the campus that was closed decades ago due to declining enrollment, Zuniga said she would not vote on the contract.