>Poorly isolated single-family homes in the south relying on air conditioning through the summer will be more expensive compared to flats in northern brick hous

>Poorly isolated single-family homes in the south relying on air conditioning through the summer will be more expensive compared to flats in northern brick houses, etc. In general it takes more energy to live in colder climates than warmer ones. So a better comparison would probably be a large house up north vs a small apartment down south.