New Balance plans to expand its headquarters in Brighton, Massachusetts, as part of a new real estate complex that would include a track and field stadium, a hockey rink, retail facilities, several office buildings and even a hotel. The $235 million project would include a new building for New Balance's headquarters with ground-floor retailing and 250,000 square feet of office space. An adjoining hotel would be 15 stories high, with 175 rooms and restaurant space in a 140,000-square-foot building. The plans also include several 12-storey office buildings comprising 650,000 square feet of space. The development, called New Brighton Landing, must still be approved by city authorities. It would be located on a 14-acre parcel of land that New Balance bought last year totally or in part for $26.5 million.