About Landmark Information Group

OneSearch is part of the Landmark Information Group, which provides access to the most extensive land and property data in the UK.

We help professionals to work through property transactions with speed and confidence. Landmark’s specialist portfolio of products and market-leading data, including OneSearch, provides the insights needed to break down complexity and deliver clarity across the whole value chain – all under one roof. 

The Landmark family is part of the DMGT Group, valued at £1.3 billion. National corporations, environmental agencies, and central and local governments trust DMGT’s safe and secure practices. 

As a group, we’re trusted with government contracts and by all of the UK’s top 20 law firms.