NEW YORK CITY — Caspi Development and Mactaggart Family & Partners LP have acquired 134-136 Broadway, a 23,064-square-foot, six-story office building in the Williamsburg neighborhood of Brooklyn. The sales price was $18.8 million. Michael Sherman of The Manhattes Group represented the buyers in the transaction. The seller was 134-136 Broadway LLC. Caspi and Mactaggart intend to turn the property into a boutique office building for high-tech and creative office tenants.