The High Line Building, at 450 West 14th Street, is starting to come into focus and is expected to get its glass curtain wall next month. CB Developers’ 15-story tower will have 78,000 square feet of office space, of which Helmut Lang has already taken two floors, 7,636 square feet of retail space at the base, and 4,000 square feet of space in the basement. The five-story base of the building is a landmarked former meat storage facility. The High Line park runs above the retail section and below the offices. The office floors are being marketed by Newmark Knight Frank, with asking rents in the mid-$70s to mid-$80s per square foot, and Winick Realty is marketing the retail space, where the ground-floor asking rent is $300 a foot.