The majority of the campaign is within Guardian Media Group, which owns Trader Media Group, but the company is currently looking for external advertising opportunities, with search engine marketing in the planning stages at present.
Thinkproperty.com is a site where estate agents can advertise properties for sale and for let.
The campaign will use national press, trade titles, online and radio across the UK, for three months from January to March next year. The company estimates that the campaign will reach 10 million consumers.
Online and print advertising will run across six Trader Media Group websites including Auto Trader, Top Marques, Boat Trader, Ad Trader and TNT magazine.
National press advertising will appear in The Guardian and The Observer. Ads will broadcast on GMG Radio, including Real and Smooth FM.
GMG's regional press will also carry the campaign, including Surrey Advertiser Group, Manchester Evening News and Greater Manchester press.
Online buying will be handled by Aegis-owned agency Diffiniti.