46 West 90th Street is a 6,790-square-foot Renaissance Revival townhouse, originally designed in 1901 by Theodore E. Thomson. Currently configured as four free-market units, the property features a renovated owner’s duplex with 3 bedrooms, 3.5 bathrooms, 2 offices, a spacious kitchen with high-end appliances, and a beautifully landscaped private backyard. Original architectural details including c...