All woodwork is flawless. Some of the interior passage doors weigh over 800 lbs, but are balanced for easy use. Accoustics are a concern throughout. Various woods and fabrics are being used. Accoustic panels in the Ballroom move out of sight on their own.
Floor is heated everywhere including the driveway and walks.
Hidden cameras everywhere including interior stone walls. Sensors in the floor can track a person to within 6 inches. System is monitored at the Microsoft campus. Gates has a personal 4-car garage. House for the maintenance staff has its own 3-car garage.