Incredible opportunity on scenic Heart Pond! This 4-bed Colonial in one of Chelmsford’s most desirable neighborhoods offers year-round lakeside living with strong bones and an unfinished addition ready for your vision. The main home features an open-concept living room with rustic beams, hardwood floors, fireplace, and patio access. Upstairs, the primary suite includes a private balcony and en suite bath, with a finished third-floor attic for extra space. The addition boasts cantilevered decks with iron Juliette balconies, plumbing for a second laundry and bidet, and a Mitsubishi split system. Included materials: siding and PVC trim. The oversized garage features 5000 PSI floors, high-end doors, gas heater hookup, and room for 4 cars. Jet skis and pontoons allowed! Property sold as-is—perfect for buyers seeking customization, investment potential, or a lakeside dream home.