I have more of a problem - in that the garage is about 50mts other side of the lane we live in. There is a an electric pole quite near the garage and I fear the answer will be a new supply just to the garage with its own meter !!
See how you get on. My 4/4 will hold charge for months without use
and start first time. Whereas my Aero struggles after 4 days without its CTEK life support. If you can use the car as regularly as many are suggesting, you might not need to spend the money putting armoured cable to your garage. Buy one of the portable capacitative jump-starters instead, then you have a Plan B.
