The OS Open UPRN dataset is a freely available product from Ordnance Survey that lists every Unique Property Reference Number (UPRN) in Great Britain, along with its corresponding geographic coordinates. A UPRN is a unique twelve-digit identifier assigned to every addressable location, ranging from residential homes and commercial buildings to telephone boxes and bus shelters. This dataset is part of the Open Government Licence, meaning it can be used by anyone without charge for a variety of purposes, including research, mapping, and data analysis.
Position in the UK Geography and Postcode System
Within the UK’s geography and addressing infrastructure, the UPRN sits beneath the more widely known postcode system. While a postcode typically identifies a group of up to around eighty addresses, a UPRN pinpoints a specific property. The OS Open UPRN dataset provides the crucial link between the postcode and the precise location of each property. It is maintained by local authorities and Ordnance Survey, ensuring consistency across the country. Coordinates in the dataset are given in British National Grid (BNG) and latitude/longitude formats, allowing for accurate placement on maps and in geographic information systems (GIS).
Relationship to Postcodes and Addresses
Each UPRN in the OS Open UPRN dataset can be matched to a postcode and address through other open data sources, such as the OS Open Names or the AddressBase products. For example, a given UPRN might correspond to the address "10 High Street, Anytown" and be within the postcode area "AB12 3CD". This relationship means that researchers can use the dataset to move from a postcode sector to individual properties, enabling detailed spatial analysis. The dataset itself includes only the UPRN and coordinates, but it serves as the foundation for building more comprehensive address lists.
Why It Matters for Area Research
For someone researching an area, the OS Open UPRN dataset is invaluable because it provides the most granular level of location data available for free. It allows you to count the number of properties in a specific neighbourhood, cross-reference with census data, or analyse patterns of development over time. Because it covers all types of properties, it can be used to study housing density, commercial activity, or the distribution of public amenities. The open licensing means results can be shared freely, making it a cornerstone for community mapping projects, academic studies, and small business planning. Ultimately, it bridges the gap between broad postcode-based statistics and the real-world arrangement of individual buildings.