Incredible opportunity in the heart of Spruce Hill! Welcome to 4837 Walnut Street--a legally zoned RM-1 duplex sitting on a deep 20x111 ft lot (2,223 SF) that allows for five units by right. Whether you're an investor, house hacker, or developer eyeing long-term upside, this one checks all the boxes in one of University City's most vibrant and transit-friendly neighborhoods. The current setup features two spacious, separately metered units (gas and electric; shared water meter): Unit 1 (Main Level): 2 bedrooms + sunroom/den, 1 full bath, in-unit laundry, private rear deck, and direct access to a generous patio yard and large unfinished basement--perfect for storage. Unit 2 (Upper Level): 3 bedrooms + den, 1 full bath, laundry hookups, a front balcony, and a rear elevated deck offering outdoor space on both ends. The property is well-positioned for easy management as-is or can be expanded or reconfigured to maximize the zoning potential. Located just blocks from UPenn, Drexel, Penn Medicine, and the bustling University City corridor. Stroll to neighborhood favorites like Don Barriga, White Dog Cafe, Louie Louie, and Hadaramaout, or grab coffee from Milkcrate Cafe before catching the trolley or subway--just minutes away. With close proximity to Center City, major universities, hospitals, and multiple SEPTA transit lines, this is a prime location for both steady cash flow and long-term appreciation. Don't miss this rare combo of size, zoning, outdoor space, and unbeatable location.