Introducing 1021 Union Street, an early-20th-century fully attached home ideally positioned between Franklin and Classon Avenues in the heart of Crown Heights. Constructed in 1930 and currently configured as a two-family residence, the property offers a flexible layout, abundant original character, and significant potential for its next owner to reimagine and enhance the home. Please note that there is no certificate of occupancy on record, and the property will require some TLC. The primary residence spans the parlor and upper levels, offering four bedrooms, two full bathrooms, and separate living and kitchen areas. The parlor level features a front-facing bedroom, a centrally positioned living and dining area, a separate rear kitchen, and an inviting eat-in nook. A full bathroom with a stand-up shower is also located toward the rear of this level. Upstairs are three additional bedrooms, including a rear bedroom with a door opening directly onto a rooftop terrace, as well as a spacious full bathroom appointed with a bathtub, double vanity, and skylight. Original details found throughout the home include a handsome wood banister and parquet flooring with decorative wood inlay. A separate front entrance descends to the lower-level space, which was previously used as a studio apartment and has undergone the beginning stages of a renovation. Currently presented as a blank canvas, this level offers an opportunity for a new owner to complete the renovation according to their needs. The property may lend itself to being transformed into a grand single-family residence with the potential to expand its existing footprint, or a purchaser may explore obtaining the appropriate approvals and certificate of occupancy to establish a legal two-family home with an income-producing secondary residence. The home currently spans approximately 1,400 square feet, with building dimensions of 18.67 ft x 35 ft and a lot measuring 18.67 ft x 58.83 ft. Located within an R8A zoning district, the property has a residential FAR of 6.02, a facility FAR of 6.5, a maximum buildable floor area of approximately 6,610 square feet, and approximately 5,205 square feet of unused FAR, presenting substantial potential subject to all applicable zoning regulations, permits, and approvals. Nestled along a quintessential tree-lined Crown Heights block, the home is only a short distance from Prospect Park, the Brooklyn Museum, Brooklyn Botanic Garden, and the Brooklyn Public Library's Central Branch, as well as the neighborhood's exceptional selection of restaurants, cafés, shops, and convenient transportation options along Franklin Avenue and Eastern Parkway. All prospective purchasers should independently verify the property's legal use, zoning, square footage, development potential, and certificate-of-occupancy requirements with their architect, attorney, and the appropriate municipal agencies. Please note that the photos have been virtually decluttered and edited.