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OS MasterMap refresh dates

Find out when OS MasterMap data is refreshed.

Get the latest dates when OS MasterMap data is refreshed. Plus you can find future refresh dates.

OS MasterMap Topography Layer

The latest OS MasterMap Topography data release is:

Publication date Extraction date
25 October 2021 7 October 2021

To order data on physical media or secure file transfer protocol (SFTP), go to OS Orders. To request data via download, go to OS Data Hub.

Publication notes
As part of our commitment to improving our processes we have updated how we supply release notes to include more information. This will include all refresh data for the OSMM Topography layer including the tidal update program.

Download our OS MasterMap Topography release notes (PDF).

Future refresh dates

Below is our future schedule of extraction and publication dates for OS MasterMap Topography Layer. We aim to keep this schedule up to date, but you should treat these dates as a guide only as they are subject to change. The extraction date will be confirmed on the publication date.

Please note these dates only apply to bespoke polygons, 'area of interest' orders and national sets.

Publication date  Extraction date
6 December 2021 18 November 2021

Past publication dates

Here are the dates when OS MasterMap Topography Layer was previously refreshed:

Publication date Extraction date
13 September 2021 26 August 2021
2 August 2021 15 July 2021
21 June 2021 3 June 2021
10 May 2021 22 April 2021

OS MasterMap Sites layer updates

OS MasterMap Sites Layer is updated every six months. The latest update is from October 2021.

Building Height Attribute updates

Building Height Attribute is updated every six months. The latest update is from October 2021.

Download our Building Height Attribute release note (PDF) and Coverage Map (PDF).