Step into a rare piece of Barrie's history at 56 William Street - a beautifully maintained 1906 century home located in the heart of Old Allandale. Set on a generous 52' x 165' lot backing onto green space, this 3-bedroom, 2-bath home blends timeless character with extensive modern updates. Step through the beautifully crafted storm door and original solid-wood front door, where you'll find impeccably maintained trim and mouldings, and a stunning cast iron wood-burning fireplace with beautiful tile hearth and wood mantle, anchoring the main living space. The home has been thoughtfully updated to preserve its historic integrity while enhancing everyday comfort, including a fully renovated upstairs bathroom (2022) featuring a custom vanity, in-floor heating, Carrera marble tile, refinished clawfoot tub, and exposed plumbing accents tying it all together. Further upgrades include standing seam metal roof with all new plywood and full ice shield coverage (2022), furnace (2021), air source heat pump (2023), updated electrical, improved insulation, and Velux skylights with solar-powered operation and rain sensors (2022). The partially finished basement (2021) adds additional flexible living space with insulated DriCore subfloor and custom wood finishes. Enjoy morning coffee on the wraparound covered front porch, and unwind in the private, west-facing backyard complete with mature trees, landscaped gardens, and a 6-person hot tub. For those looking to add more living space, or multi-unit investment options, the property and zoning present endless expansion and value-add opportunities! Located on one of Allandale's most desirable and historically preserved streets, this home is surrounded by pride of ownership and a strong sense of community. Just steps to Shear Park, the Allandale GO Station, Schools, and Kempenfelt Bay, this is a rare opportunity to own a truly special home in a highly walkable and established neighbourhood.