Postcode Explorer
Check broadband, flood risk, crime, radon, mining risk, and council tax estimates for any UK postcode. Instant results from open data sources.
What this tool checks
The Postcode Explorer combines multiple open data sources to give you a quick overview of any UK postcode area. Broadband, radon, mining risk, and council tax estimates are calculated instantly from local data. Crime stats and flood risk are fetched from the Police API and Environment Agency respectively.
All estimates are based on postcode-level data and regional averages. For property-specific information — such as actual EPC ratings, listed building status, or detailed survey risks — analyse a property listing on HomeThink.
Frequently asked questions
- How accurate is the broadband estimate?
- Broadband speeds are a rough estimate from typical speeds for the kind of area a postcode is in (urban, suburban, town, rural, remote) — not a measurement, and not a record of what is installed at any address. Actual speeds depend on your exchange, cabinet, and whether full fibre has been deployed to your specific street. Check with providers for confirmed speeds.
- Where does the crime data come from?
- Crime data comes from data.police.uk, the official UK Police API. It shows crimes reported within approximately 1 mile of the postcode centre, for the latest available month. Data is typically 1-2 months behind the current date.
- How is flood risk assessed?
- The explorer lists Environment Agency flood warning areas near the postcode and any warnings in force now, for England only. It is not the Environment Agency's long-term flood-risk rating for an address — use GOV.UK's long-term flood risk service for that, and a full environmental search during conveyancing, particularly in Wales and Scotland.
- What is radon and should I worry about it?
- Radon is a naturally occurring radioactive gas that can build up in enclosed spaces, particularly in areas with granitic or uranium-rich geology. High-risk areas include Cornwall, Devon, Derbyshire, and parts of the Scottish Highlands. PHE recommends testing with a DIY kit (~£30) if your property is in a high-risk zone.
Go beyond postcode data
Open a specific property listing with the free HomeThink browser extension for a free AI read — red flags, local data and the full monthly cost.
Related guides
A description of an area built from public data, not advice about any specific property. Figures are the latest published and may be out of date, and this is no substitute for visiting the area and checking with the source.
Contains public sector information licensed under the Open Government Licence v3.0.
Got a specific property in mind?
Open any Rightmove, Zoopla or OnTheMarket listing with the free HomeThink browser extension and get a Free AI report with red flags, a score and neighbourhood intel in about a minute. Free account, no card required.