except that there's roughly 30million houses that aren't built like this in the uk, we have to work with what we've got.
unless you're proposing knocking them all down, and starting again?
Not at all, my half joking post is an unworkable proposition.
However, there are easy wins to improve the worst bits of existing houses, some mentioned on this thread -
We already have grants for loft insulation. Cavity wall insulation, I'm less convinced its a good thing to do on some houses, but there it is.
Sticking solar water panels to help with hot water use during spring/summer/autumn on everybody's roof would be a fine thing to do.
Improving the insulation of everybodys existing house is a no brainer.
Encouraging (maybe even grants to assist) people to fit exterior window insulation (e.g. shutters) would help hugely but currently has planning restrictions.
Same with porches to provide extra insulation around doors.
I'm sure there's a load of other easy things you can do.
I think our house is probably a good example - half of it is very early 1800's and half is ten years old; guess which drafty half desperately needs better insulation? Plus our heating installation (aga + rads + immersion for summer HW) could really benefit from some solar panels to run hot water in the summer (thus cutting a huge chunk of our electric bill), and some way of running the aga more efficiently (thermal store).