An organisation calling itself See IT, based in Edinburgh in the UK provides interactive IT solutions, including interactive heat loss mapping. My source has pointed me to a website with the London Borough of Haringey that provides this service. Unfortunately I have been unable to access it via the See IT website.
If you go to this Haringey Council website link you will find a typical part of Haringey. You can search around the borough using a known street name or postcode.
I decided to search the postcode N22 7TY. If you click to the right on the interactive map, just below River Park Rd. are the council’s main offices. A typical 1960s building, it scores a fairly high rate of heat loss. Diagonally opposite is a relatively new Cinema complex which scores very well.
Theoretically anyone in the UK should be able to check out their own house. No doubt the councils will use this service soon to fine the heat loss polluters, using a scale a fines of course!