Located on the coveted north slope of Potrero Hill, 448 Pennsylvania is a Victorian single-family home lovingly maintained by the same owners for over 40 years. Built in 1900, this two-level residence blends timeless charm with thoughtful updates, offering three bedrooms plus an office, 2.5 bathrooms, and exceptional development potential. The main level is designed for effortless indoor-outdoor living, with an updated kitchen and secondary living area opening to a private backyard with a hot tub. Period details soaring ceilings, original moldings, and anaglypta wallpaper add warmth and character throughout. Upstairs, a spacious sun deck provides a serene retreat, while a full attic offers endless possibilities. The lower level includes a flexible living area with sleeping alcove, bath, and separate entrance, ideal for guests or rental income. An attached one-car garage with laundry and storage adds convenience. Recent upgrades include a new roof, wide-plank oak floors, and fresh paint. Minutes from 18th Street's cafes, shops, and sunny Potrero weather, with easy access to 280/101, Caltrain, Mission Bay, and Dogpatch.