GB Group has sourced the data from partners involved in the final stages of the conveyancing process, when residential property searches are completed.
According to the company it provides 80% certainty that someone is about to move home with a timescale up to 10 weeks in advance of them moving.
The pre-homemovers data is the first of a new range of lifestage data sources GB plans to launch over the next 12 months, under the 4C-UK brand.
In addition, it is planning to be capable of delivering all data to clients via the internet by the end of 2006.
David Green, business development director at GB Group, said: "Being able to contact them during this period is extremely valuable and also gives a business the opportunity to record a customer's new address.
"Consumers changing house are also in 'spend' mode -- research shows that they spend an average of £15,000 in the first 12 months after moving."
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .