Launch price

London property data,
open and honest.

Ask plain-English questions about the London property market. Every figure comes from HM Land Registry public data — every calculation is published so you can verify it yourself.

1.78M
Transactions
33
London Boroughs
16
Years of Data
£12.99 £1.99
Launch price · No VAT charged
  • 10 queries, valid for 7 days
  • Charts generated with every answer
  • Planning evidence reports included
  • All 33 London boroughs, 16 years of data
  • No account or registration needed

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Don't want to pay? Use our open scripts.

OpenProp runs on HM Land Registry Price Paid Data (Crown copyright, open licence). Our validation notebook and calculation scripts are published on Kaggle — the same logic that powers this tool. If you'd rather run the numbers yourself, everything is there: open scripts, open methodology, open results. It's the same data, the same calculations. We're not hiding anything.

View our open validation notebook on Kaggle →

Professional users are encouraged to verify results independently. Found a discrepancy? Report it via the Kaggle link above.