The Intermediate Building is a historic municipal building at 324 Washington Street in Wellesley Hills, Massachusetts. Designed by architects Hartwell and Richardson, and completed in 1894, it is a two-story brick building with Romanesque styling. It has a hip roof pierced by hip-roof dormers, the central one larger than those flanking it. Windows on the first floor have segmented-arch tops, while those on the second level are rectangular. A terra cotta stringcourse separates the first and second levels. The building served as the first Wellesley High School, and later as an annex to Town Hall. It is now Phillips Park Apartments for senior citizens.