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OS Places API

Find UK addresses instantly online and be confident you're getting the most up-to-date information with our address API. 


OS Places API

With OS Places API you have direct access to rich address data for geocoding, postcode searching, form-filling and much more.

Accurate geocoding

Perform accurate geocoding and reverse geocoding with our secure, scalable, and resilient address look-up web service.

Complete addresses

Search by postcode, UPRN, full or partial address and ensure you get the right address first time. Keep your records accurate to provide effective citizen services.

Instant answers

When an incident happens, control room staff need to know which properties are closest. The OS Places API GeoSearch tool gives instant answers. This helps create the common operating picture that’s vital for emergency services. 

Capture and Verify

Capture and Verify

Improve efficiency – use OS Places API to verify the data you’re capturing against Ordnance Survey’s AddressBase® Premium and AddressBase Premium Islands dataset.

Edit out-of-date (or partial) details of residential and commercial properties in your own databases and add unique references to your properties, via the UPRN, for enhanced data management.

With OS Places API you can add intuitive address search (geocoding) capabilities to your applications. Let a user search a full or partial address, a postcode or a UPRN and find the complete address including its location.



Make sure OS Places is driving your applications, and users will have access to some of the most sophisticated online GeoSearch services.

Let them draw their own bounding boxes or define a specific radius search area, and use the API to pull up all known address data within that location. Alternatively, let users click on a map and discover the nearest address.  



OS Places API has 7 endpoints, each giving you a different way to find addresses.

Capture and Verification

  • Find - Free text search
  • Postcode - Search by postcode
  • UPRN - Search by Unique Property Reference Number 


  • Nearest - Find addresses near to a given location
  • Bounding Box - Find all addresses within a given bounding box
  • Radius - Find all addresses within a given radius 
  • Polygon - Find all addresses within a given area of interest

How to get this product

  • You’ll benefit from up to £1,000 of free Premium data every calendar month (no free OS Places API or OS Match & Cleanse API data), as well as free development mode.
  • Gives you access to both OS OpenData and Premium data within the API.
  • It can be used by anyone, whether you're a lone developer, a small company, or a big business.
  • You can use Premium Plan to develop an app or service for use by a third party, such as the public or another organisation. You cannot use Premium Plan to develop an app or service for your own use.

See the OS Data Hub Plans for more information.

Technical specification

Key FeaturesWhat this product offers
FormatJSON and XML
Update Frequency​Every six weeks
Projection​British National Grid (EPSG: 27700), EPSG:4326, EPSG:3857 or EPSG:4258.
Availability​99.9% uptime
Supply​Access via the OS Data Hub
Coverage​Address, geometry and UPRN for UK and Isle of Man. Address and UPRN for Jersey and Guernsey.


Success stories

Faster access to healthcare assets for NHS Healthy Urban Development Unit

How location data helps the NHS London Healthy Urban Development Unit (NHS HUDU) ensure that everyone has access to the healthcare they need.

London Ambulance Service NHS Trust uses OS Places API for out of area look ups

Using the OS Places API allows the London Ambulance Service NHS Trust to use flexible search methods for call handlers including full address, partial address.

BT connected to UK mapping data

British Telecom (BT) combined data from Ordnance Survey and Ordnance Survey of Northern Ireland in one seamless service to create a dataset for the UK.