SUGAR LAND, TEXAS — Allied Realty has broken ground on The Retreat at Riverstone, a 249-unit multifamily property in the Houston suburb of Sugar Land. The complex, located at 18545 University Blvd., will offer one- to three-bedroom apartments, as well as a fitness center, cyber café, swimming pool, grill area and two dog parks. The complex, slated to open in the fall, is the first multifamily development in the Riverstone master-planned community. Wallace Garcia is providing design services for the project, and Orion Real Estate Services will manage the property. Capital One arranged the construction financing.