Breathtaking double height addition by multiple award winning architect enlarges and transforms 1831 Lexington dairy farm into a dazzling light-filled, unique living space with private deck. One acre site backs onto Arlington Great Meadow off Minuteman Bikeway. Two story open kitchen and DR,4 bedrooms,2 offices, breakfast room, reading nook, lookout, music room, loft, full basement, and space for au pair. Landscaped exterior rich in native plants offers superlative views and sitting areas. Ideal for entertaining.