Every addressable location in the UK has a Unique Property Reference Number. We make them searchable.
Westminster, Greater London · SW1A 2AA
A Unique Property Reference Number is a 1-12 digit identifier given to every addressable location in Great Britain - houses, flats, shops, bus shelters, electricity substations, even individual park benches.
UPRNs are created and maintained by local authorities in their Local Land & Property Gazetteers, then collated by Ordnance Survey into the national AddressBase and the free OS Open UPRN dataset.
Each number is persistent and never reused. Once a UPRN is assigned it stays with that location for life - so it’s the dependable key for joining property records across planning, utilities, surveying, the NHS, and government data.
Sourced from authorities + OS
Built from council LLPGs and published by Ordnance Survey as open data.
Persistent, never reused
A UPRN stays bound to its location permanently, even after demolition.
A key that joins datasets
The common reference linking planning, utilities, health and survey records.
Open UPRN data however you want it - query one record over HTTP, pull the whole dataset, or explore it without leaving the browser.
Resolve any UPRN, postcode or USRN over HTTP. No key, no rate-limit drama, JSON by content negotiation.
curl uprns.io/uprn/100023336956Read the API docs
The entire dataset as versioned, columnar Parquet on R2 - addressable by URL, perfect for analytics.
SELECT * FROM read_parquet('…/uprn.parquet')Browse downloads
Run SQL against the live Parquet files with DuckDB-WASM. Nothing installed, nothing leaves your machine.
SELECT region, count(*) GROUP BY region;Open the explorer