It starts with peace of mind. A brand-new roof was installed in 2023 with a lifetime warranty, and five new windows were added in 2025, also backed by a lifetime warranty, showing continued care and long-term investment in the home. Built with insulated concrete forms (ICF), this property offers exceptional durability, energy efficiency, quiet living, and freedom from the common moisture concerns found in older basements. Welcome to 17 Williams Street, a rare opportunity to own a thoughtfully designed, energy-efficient duplex in a quiet Lewiston neighborhood. With over 3,300 square feet, each level features three bedrooms, two bathrooms, open-concept living, private laundry, mini-split air conditioning, and in-floor heat for consistent, cozy comfort year-round. Live in one unit and rent the other, with rental income that can cover more than half of your mortgage, making homeownership surprisingly affordable. Ideal for an owner-occupant, multigenerational living, or a strong investment, with the flexibility to convert back to a spacious single-family home if desired. Even more impressive, this property is priced below assessed value—a rare find that adds instant appeal and opportunity. Located close to schools and amenities in a peaceful residential setting, 17 Williams Street offers comfort, quality construction, and outstanding long-term value.