955 Park Avenue, between 81st and 82nd, is a premier 13-story pre-war co-op designed by Robert T. Lyons in 1915. Converted to co-op in 1978, it has 29 apartments and offers full-time doorman, bike and storage rooms. Pets, in-unit washer/dryers, pied-à-terre, and co-purchasing are allowed with approval. Financing up to 50% is permitted, with a 2% transfer fee paid by the buyer.