The Financial Times has reported that WB is heading up to purchase Leavesden Studios in Hertfordshire, England, after finishing the HP films. As everyone knows, Leavesden has been used since the beginning for all the Harry Potter movies.
The following was reported as well:
"The proposal also includes a plan to allow members of the public to visit, by appointment, the sets of films made at Leavesden, including the Great Hall from the Harry Potter series."
Warner Brothers has also put out a statement including the following:
"Hey Potter Fans! WB is making a move to aquire and expand Leavesden Studios outside of London - the home of the "Harry Potter" films!"