Ample parking on secure driveway for 2/3 cars behind electric gates.
Surplus energy being used to heat the immersion tank, reducing and even eliminating the need for the gas boiler during the summer. The immersion tank is oversized to provide ample hot water for the house.
Old cesspit used for collecting the rainwater that would otherwise have gone into the drainage system.
Coupled with a room sealed log burner that draws its combustion air directly from its own external supply makes for a highly efficient heating option. (A conventional log burner draws the air used for combustion from the room, the room would then draw in cold air from outside which is counter productive.
Only heating the water you need for the mug rather than a kettle.
When we renovated The Studio there were not enough good slate tiles to retile the roof. So we have recycled them to build dwarf retaining walls in the garden.