His primary residence is a hexagonal shed style mansion he has dubbed Westwind, located in Bedford, New Hampshire, just outside of the larger city of Manchester. The house has at least four different levels and is very eclectically conceived, with such things as hallways resembling mine shafts, 1960s novelty furniture, spiral staircases and secret passages, an observation tower, a fully-equipped machine shop, and a huge cast-iron steam engine which once belonged to Henry Ford built into the center atrium of the house (which is actually small in comparison), which Kamen has had converted into a Stirling engine-powered kinetic sculpture.

Also on the property there is a softball field regularly used by the local police force. Kamen owns two helicopters, which he regularly uses to commute to work, and has a hangar built into the house as well.