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.

Get instant access — £1.99
No account needed · Secure payment via Stripe · Recover session →
Market Intelligence

Where London
Moves

Monthly transaction volume across London postcode districts — refreshed from Land Registry data. Play the timeline to see where buyer activity has shifted over the years.

1.76M
Transactions
33
London Boroughs
16
Years of Data
How it works

Three steps, under a minute

Pay once, ask in plain English, get verified answers with charts.

01
Pay once

£1.99 gives you 10 queries, valid for 7 days. No subscription, no account. Pay by card via Stripe.

02
Ask in plain English

Type your question naturally — median prices, borough comparisons, affordability trends, planning evidence.

03
Get verified answers

Every figure is sourced from HM Land Registry. Charts and planning evidence reports included.

Examples

Ask anything about
London property

Real questions our users ask every day.

→What is the median flat price in Wandsworth right now?
→Which borough has grown most since 2020?
→How affordable is Hackney compared to 2015?
→Which postcode in Lambeth had most transactions last year?
→Generate a planning evidence note for SW11 flats.
→Compare freehold vs leasehold prices in Islington.
Real users

What people are saying

From data professionals and consultants who put it to the test.

For years I have been trying to look at the HM Registry page to understand property pricing in London and always stop short after two pages. This app just did that in a couple of minutes for me.

Dr. David Tang
Dr. David Tang
Building MHRA SaMD-compliant LLM solutions for healthcare · CogStack

I like how easy it is to get simple questions answered. Getting a price trend chart is veeeeery easy! Like, E16 median price is super fast. The app is definitely cool and I love that it's automatically getting fresh data from HMRC.

Borislav Slavov
Borislav Slavov
Managing Consultant, Enterprise Strategy · IBM iX
Simple pricing

Pay once, use for 7 days

No subscriptions. No account. No surprises.

£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
Get instant access — £1.99
Secure payment via Stripe · No account needed

Don't want to pay? Query the raw data yourself.

OpenProp runs on HM Land Registry Price Paid Data (Crown copyright, open licence). The same 5 GB database is free to query on Kaggle — no payment needed beyond a free Kaggle account. We've published two notebooks: one that verifies our methodology, and one that shows you how to query the full database directly.

Open validation notebook →

Query the 5 GB database yourself →

Read this before you start: How OpenProp Works — data filtration is critical. Querying the raw CSV without the correct filters produces different medians and counts from what our tool shows.

Found a discrepancy? Report it via the Kaggle links above.