Some websites that contain useful information and have a postcode-based search:
- Crystal Roof - research tool with postcode granularity. Demographics, affluence, crime, noise, flooding, etc presented as a summary and via heatmaps. Also, users can leave reviews on postcodes they know.
- StreetCheck provides some good info about the area, in terms of housing types, demographics, crime, broadband quality and others.
- Check My Postcode similarly provides street view, census information and a short summary.
- Check Postcode provides a summary of census information, broadband speeds, sold house prices transport availability and schools data.
- mycounciltax.org.uk can show the Council Tax amount for a given postcode.
- Metropolitan Police provides crime rate per area.
- uSwitch and broadband.co.uk seem to provide information about internet providers for a given postcode.
- London Air displays realtime pollution levels per location.
- Locrating shows the nearest schools (with ratings).
- Quicksold Housing information, residential data, crime statistics, sold house prices along with wealth and other ranks.