With the two players out of contract next summer, Bees' manager Wally Downes has acted quickly to secure the services of Smith and the reliable Dobson.
Smith, 23, linked with possible moves to the FA Barclaycard Premiership throughout the close season and winner of both the 'supporters and the Bee Hive readers' player of the year awards last term, has agreed to a two-year extension.
Meanwhile, the 22-year-old Dobson, who figured in all 46 league games last season, has signed a three-year contract extension, that will keep him at Brentford until 2007.
Downes, realising the importance of securing the players told the club's official site:
"It's a great coup as Paul and Michael are an integral part of my plans for the coming season".
With Ibrahima Sonko thought to be ready to put pen to paper on a new deal and Matt Somner and Leo Roget having already signed new contracts, it would appear that Brentford have a secure back line in readiness for the forthcoming campaign.
However, all Bees fans will now be hoping that the manager can introduce a number of new signings to strengthen other areas of the playing side.