Historic Thaddeus Frost House (c. 1827), a rare Federal-style Colonial prominently situated on a picturesque 12,486 sq. ft. corner lot in Belmont's desirable Winn Brook neighborhood, near Belmont Center. Rich in architectural character and period detail, this distinctive property features wide pine floors, original millwork, built-ins, and multiple fireplaces. An exceptional opportunity for contractors, developers, restoration specialists, or buyers seeking a major restoration project or the possibility of constructing a new home, subject to required approvals. Convenient to Belmont Center, Route 2, public transportation, Cambridge, Boston, and Winn Brook Elementary School.PROPERTY REQUIRES EXTENSIVE STRUCTURAL REHABILITATION AND IS BEING SOLD STRICTLY AS-IS. Significant termite damage affects main support beams, sills, and numerous floor joists. The foundation requires substantial restoration. Visible knob-and-tube wiring is present, and the house requires rewiring. Property is not connected to municipal sewer, and the Town has no records identifying an existing septic system or cesspool.The Thaddeus Frost House is listed on the Town and Massachusetts Registers of Historic Places and is located within its own Historic District. EXTERIOR ALTERATIONS, ADDITIONS, OR DEMOLITION FOR NEW CONSTRUCTION REQUIRE REVIEW AND A CERTIFICATE OF APPROPRIATENESS (COA) FROM THE BELMONT HISTORIC DISTRICT COMMISSION. A demolition delay of up to one year may apply. Any proposed replacement home, including its exterior architectural design, is subject to applicable Historic District regulations and approvals.SELLER HAS OBTAINED A CONDITIONAL CERTIFICATE OF APPROPRIATENESS AUTHORIZING DEMOLITION OF A PORTION OF THE EXISTING REAR ADDITION, SUBJECT TO THE COMMISSION'S CONDITIONS. See MLS Documents for details, including the COA application, photographs, floor plans identifying the approved demolition area, and an AI-generated conceptual rendering illustrating the home's potential appearance following removal of the rear addition. Rendering is for illustrative purposes only and does not represent final approved construction plans.