How our data works

Property Compass does not rely on black-box aggregators. Every price, yield, rent index, and area metric you see on the platform comes from an identified source: a UK government or other public dataset, or a named commercial provider such as PropertyData. This page explains exactly what we use and how fresh it is.

Why this matters

Most property platforms pull from a single commercial aggregator and re-badge the output. You see a number; you do not see where it came from or how stale it is. That is fine for a browse but not for a purchase decision. We built Property Compass to show you the source and freshness of every figure so you can weigh the evidence the same way a professional would.

Our data sources

HM Land Registry: Price Paid Data

The official register of every residential property sale in England and Wales. We aggregate transactions by postcode district and property type to produce median prices, transaction counts, and year-on-year price change. Source: gov.uk Price Paid Data.

HM Land Registry: House Price Index (HPI)

The official monthly house-price index for the UK, maintained jointly by HM Land Registry, ONS, Registers of Scotland, and Land and Property Services Northern Ireland. We surface local-authority-level HPI values and annual change. Source: gov.uk UK HPI.

Office for National Statistics: Rent Index

The ONS index of private rental prices by region. We use this for rent trends and for computing gross yields against Land Registry sale prices. Source: ONS Private Rent and House Prices, UK.

Office for National Statistics: Population & regional data

Population counts, affordability ratios, and regional statistics underpin our area-screening panels. Source: ons.gov.uk.

EPC Open Data

Energy Performance Certificate data from the Ministry of Housing, Communities and Local Government (MHCLG). We use median EPC bands as part of the investability picture for an area. Source: Get energy performance data.

EPC address-data copyright notice: Ordnance Survey and Royal Mail Group Limited reserve all their respective copyright, database rights, trademarks and other intellectual property rights. See the Ordnance Survey and Royal Mail Copyright and Database Right Notice for the full terms.

police.uk: Crime

Street-level crime counts for each postcode district, which give the district its crime rating. Source: data.police.uk.

PropertyData

Specialist UK property analytics (demand, yields, flood, council tax, planning). Used where a government dataset is not available at sufficient granularity. PropertyData is clearly labelled wherever it appears so you know which metrics come from a commercial analytics provider and which come from government sources.

How we present freshness

Every data panel shows a small coloured dot alongside the source badge:

Green: updated in the last 30 days
Amber: updated between 30 and 90 days ago
Red: older than 90 days or not yet ingested

If a panel is red, treat its figures as indicative until the next ingestion run. Government datasets are published on their own cadences: Land Registry Price Paid is monthly, HPI is monthly in arrears, ONS rent is monthly. Property Compass ingests the latest published data on a weekly schedule.

What we do NOT do

We do not re-badge a single commercial aggregator as our own data.
We do not hide the provenance of a number behind a brand name.
We do not claim freshness we cannot demonstrate. If it is red, it is red.

Attributions and licences

Most of our data is public sector information that its publishers license under the Open Government Licence v3.0. For each source below we show the attribution its publisher asks for, and its licence. Where a publisher sets no wording of its own, we use the licence's: Contains public sector information licensed under the Open Government Licence v3.0.

Open Government Licence v3.0

HM Land Registry Price Paid Data

Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Royal Mail and Ordnance Survey permit the use of the address data "for personal and/or non-commercial use; to display for the purpose of providing residential property price information services".

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