Gary Neville, $8 Million, Bolton

Gary Neville is a former player and pundit in English football. He began working as a commentator for Sky Sports after retiring from football in 2011. Gary also served as the England national team’s assistant manager. He previously owned a bungalow worth $2.9 million in Manchester. However, Neville sold the mansion in 2003. Now, he lives in an eco-house.

He has created an environmentally friendly home and uses his celebrity profile to support social concerns and set up an example of how a player can also be an environmentalist. The construction appears to be so advanced that the government intends to use it to model all future zero-carbon developments.