Surrey have won 10 trophies in the past seven seasons
Surrey have agreed a new sponsorship deal which could ultimately be worth £2.5m to the club.
Brit Insurance Holdings will the back the club for the next three years, with the option for a further two, at an annual cost of £500,000.
Surrey are set to begin work on a £24m redevelopment of their ground, which will be re-named The Brit Oval.
"This new partnership could not have come at a better time," said chief executive Paul Sheldon.
The deal is a 50% improvement on the previous agreement with AMP, who pulled out mid-way through their contract.
Sheldon denied that supporters will feel alienated by the fourth name change in 15 years.
He added: "It's still The Oval and we're still playing cricket just as we have since 1845.
"People will continue to come to The Oval whatever it is called."
The redevelopment work will be concentrated at the Vauxhall End where a new stand will increase the overall capacity from 19,000 to 23,000.
Surrey are going through a period of change with regard to playing matters as well.
Jon Batty has replaced Adam Hollioake as captain for the 2004 season and the club is currently searching for a new coach to replace Keith Medlycott.
Sheldon confirmed that he had interviewed five candidates for the coaching job, including Australian Steve Rixon and two men based in Britain.
Surrey expect to announce their final choice within the next week.