Welcome to a meticulously maintained Custom Colonial in the Hill Section of Boonton. This home boasts upscale living, designer-level finishes, and exceptional curb appeal in one of Boonton's most desirable neighborhoods. A charming front porch, professional landscaping, fenced-in yard, paver driveway & pathways, and exterior uplighting create warm first impressions. Inside, this 4-bedroom + office, 2.5-bath home showcases beautiful natural light and a flowing layout for both everyday and holiday. The spacious main level invites living and dining spaces: a beautifully appointed kitchen with Thermadore appliances and a Sub-Zero refrigerator/freezer, a warming drawer, a Trex side deck, and a back room addition that can be used for recreation, or as a first floor bedroom. Upstairs has 3 generously sized bedrooms, including a primary suite + an office/potential 5th bedroom, that provide comfort and versatility. Below, a walk-out basement transforms into additional potential for storage, fitness, media space, crafts, or extended entertaining options with direct outdoor access. Addition wing has supplemental ductless split units (upstairs heat+cool, downstairs cool). Conveniently located near downtown Boonton shops, restaurants, parks, major highways, and NJ Transit access, this exceptional property blends timeless style with modern convenience. Come experience all that 303 Highland Ave has to offer in Boonton: Small Town, Big Heart.