Welcome to this mid-century modern gem with an A-plus walkable Falls Church City location!** This stunning 6 bedroom/5 bath home stands out for its architecture, big windows, and California-style indoor-outdoor living. **With a high walk score (86), it’s one leafy block to Cherry Hill Park, the W&OD bike trail, and the library and within a few blocks of restaurants, fitness studios, Harris Teeter, and the upcoming Whole Foods Market.**Designed to LEED-platinum (top green building) standards by Ralph Cunningham of award-winning Cunningham/Quill Architects, it has been featured in USA TODAY, the Falls Church News Press, the Washington DC Solar Home tour, and the Falls Church City 2012 Home and Garden tour.**The home blends style with practicality, optimizing space to provide comfort and flexibility. **It includes a legal 2 bedroom/2 bath spacious ADU that flows seamlessly with the rest of the house, offering extended living space, rental income, a nanny suite, or grandparent apartment.**The main level features a great room with a 12-feet-high wall of windows that face a sunken garden set back from one of the prettiest streets in the Little City.**It includes a gracious foyer, wood ceiling beams, 16-foot long custom built-in dining bench, a wall of custom bookcases, gas fireplace surrounded by polished concrete, kitchen with tall maple cabinetry and induction stove. **Also on this level is the primary bedroom/bath suite, full hall bath, laundry, guest bedroom/office, and a dramatic screened-in porch with polished concrete walls.**The upper level includes three bedrooms, a double-vanity hall bath, and a lounge/playroom.**The lower level features a home gym, storage room, and the 1,000-square-foot unit with tall windows, full kitchen, second living area, second laundry room, and second patio.**The quarter-acre lot includes impressive gardens with seating areas in front and back.**This well-insulated, electric vehicle-ready home was built to be durable, sustainable, and energy efficient.**It has a metal roof, four-zone dual fuel (mostly electric) heat pump, energy recovery ventilator, whole-house air purification, tankless water heaters, LED lighting, ENERGY STAR appliances, countertops and flooring with recycled material, xero-scaping, underground cistern/ability to flush toilets with rainwater, structural insulated panels, and Serious Windows with the same insulating film that was used in the Empire State building’s renovation.**Its design and construction was chronicled in USA TODAY’s former Green House blog.