Welcome to 40 Dix Street in Waltham, a beautifully renovated red-brick home offering an impressive combination of modern upgrades, spacious living, and flexibility.The main living area features 4 bedrooms and 3 full bathrooms, including a spacious primary bedroom with a private en-suite bathroom and generous closet space. The newly renovated kitchen is equipped with new appliances and flows seamlessly into the open-concept dining and living areas, creating a bright and inviting space perfect for everyday living and entertaining. Two fireplaces add warmth and character throughout the home.Recent improvements include new electrical wiring, a new electrical panel, new plumbing, recessed lighting throughout, and central heating and air conditioning. The property also features a generator/battery backup system for stored electricity, providing added convenience and peace of mind.The fully finished basement offers exceptional additional living space with 2 additional bedrooms, a full bathroom, kitchen, open living area, laundry, and a separate heating and cooling split system. This flexible lower level is ideal for an extended family, guests, home office, or other permitted use and may offer potential for additional income, subject to local zoning and permitting requirements.Outside, enjoy a private backyard, attractive brick exterior, and parking for up to 4 vehicles. Located in a desirable Waltham neighborhood, this move-in-ready property combines extensive renovations, flexible living space, and modern comfort in one exceptional home.