Supplements: Additional features include dual pane windows with low E rating, 5000 gallon buried water supply tank, dual gray black water system also available for landscaping,exterior spot lights at roof line on each corner of home, heat exchanger with separate filter, R-41 insulation throughout the home including the garage, attic access with folding steps fo ... (Read more) Additional features include dual pane windows with low E rating, 5000 gallon buried water supply tank, dual gray black water system also available for landscaping,exterior spot lights at roof line on each corner of home, heat exchanger with separate filter, R-41 insulation throughout the home including the garage, attic access with folding steps for easy access, re-circulating hot water system provides no-wait hot water, water softner loop, satellite dish, 450 square foot upper level view deck is ready for the new owner with lighting and electricity already provided. Just need to install the exterior stairs and wa la, sunset viewings from the rooftop!! The electronic central networking system is pre-wired for your computer surround sound and security system requirements.