Joseph Stavrach’s Triangle Assets is planning a 41-story residential building at 303 East 44th Street, according to permit applications filed with the Department of Buildings today. Plans call for a 96,774-square-foot building with 44 apartments. The building is slated to include a sauna, spa, pool, exercise room, lounge and business center. The fourth through 16th floors will contain two apartments each, and the 17th through 39th floors will hold either full-floor apartments or private terraces. A duplex is planned for the 40th and 41st floors. ODA is the architect of record. A three-story commercial building currently sits on the site. The Manhattan-based Triangle owns a 28-story office tower at 369 Lexington Avenue and a 150,000-square-foot office building at 2 West 46th Street, according to its website.