Which streets leak heat, and what insulation is worth
Every home with an energy certificate carries a band and a set of recommended improvements. Group those by street and by postcode area and you can see which streets run cold, and what the register says insulation and better heating could save.
8804 energy certificates across 3 postcode areas and 195 streets, joined to 47436 sold-price records. Coverage grows automatically.
Leakiest postcode areas
Ranked by the share of energy certificates rated band D or below.
Energy & price checker
Enter a postcode or street to see recent sold prices and, where the data reaches the anonymity floor, the energy-band distribution for that street.
What insulation adds
Each certificate records a potential rating after recommended improvements, plus an estimated annual heating cost before and after. We average those across an area to show the realistic uplift.
Browse areasMore property signals
Every signal joins an open government dataset to the same street and area record, computed to real numbers.
Flood risk, and what it does to prices
The share of a street's homes in an Environment Agency flood zone, and the observed sold-price gap between flood-risk and dry homes in an area.
Flood risk by areaDid an extension add value?
The observed gap between streets that gained an extension, loft or conversion and streets that did not, from granted planning consents.
Extension value by areaIs the area getting safer?
The direction of the street-level crime trend over two years, and the quietest streets for anti-social behaviour, from open police data.
Crime & safety by area