@3Dwarves hi there!
We are in Surrey, I think most councils in Surrey have public planning portals. This is the one for Waverley… https://www.waverley.gov.uk/Services/Planning-and-building/View-and-comment-on-planning-applications/Search-planning-applications
you can search by postcode and road name for pretty good results.
When we bought our cottage it had damp, we did a lot of research and found that poor ventilation and no insulation were amongst the reasons for it. We ripped everything back to the outside tiles, spent a lot of time researching the best insulation for an old cottage (we went with sheeps wool and celotex in the end) and repainted the exposed brick areas with lime plaster. We also installed a log burner.
I would suggest that you narrow down where you want to live, for schools etc and then call up the local estate agents and explain your needs. You may find that a previous owner has carried out some insulation improvements…but I wouldn’t worry about that until you have found some options and seen what’s on the market.
I hope that helps