This 3,635 sf spectacular, architecturally designed, secluded, waterfront home with breathtaking sunrise views, was lovingly created in 2015 & features 4 bedrooms, 2.5 baths, a sunlit two-story family room, numerous library/unique art display built-ins, an office, a gym, tons of storage & an all-season glass porch with mesmerizing views of the Piscataqua River at the mouth of Great Bay and the lights of the Portsmouth skyline. Technical distinctive features include superinsulation, geothermal heat & central air. a heated 2-car garage, plaster walls & ceilings throughout, heated-floors on ground floor, red birch & marble flooring, Berber carpeting, a primary bath with a SteaMist steam shower + a dressing room.  Solar photovoltaic panels provide 2/3 +- of energy for heat, cooling & power for both cottage & house resulting in energy costs of under $1,000/yr! Amazing! Outside, relax & enjoy the shaded deck & covered porch sweeping 30' across the water side, or sitting in your Adirondack chair on the lawn above the lovely dry-stone breakwater as you take in the recently built dock & float, and your boat at the deep-water mooring. You will love the truly adorable EnergyStar-rated 1173 sq ft, 2 BR, 2BA cottage for guests, extended family, caretakers, or renters.   The cottage has a separate garage & parking, separate entrance, & private patios.   Elevated above the floodplain, the home is grandfathered just 55 ft back from mean high tide. Showings begin 8/26!