Rare opportunity in Glen Ellyn! Welcome to 23W019 Sidney Ave, a spacious one-owner home built in 1964 and situated on an impressive 20,340 sq ft lot. Offering 2,319 sq ft above grade plus a 923 sq ft basement with exterior access, this home provides exceptional space, flexibility, and potential throughout. The main and upper levels feature hardwood floors, a large living room with fireplace, formal dining room, kitchen with eating area, home office, powder room, and convenient mudroom/laundry area. Upstairs offers generously sized bedrooms including a spacious primary suite with walk-in closet and private bath, along with 2 additional large bedrooms and a full hall bath. The basement includes a large recreation area, mechanical/storage space, and direct access to the exterior. Outside, enjoy a sizable backyard, deck, fenced yard space, and a 2.5-car garage. A fantastic opportunity to renovate, update, expand, or make it your own in a desirable Glen Ellyn location close to expressways, shopping, dining, parks, and more. Estate-style as-is offering with incredible upside and room to grow!