The Durham County Board of Commissioners voted Monday night to merge the Wake and Durham mental health agencies and to sign a letter of intent for the merged agency to lease 55,000 square feet in a Triangle Transit-owned building in the Imperial Center.

The new agency is expected to move into its new headquarters July 1.

A number of private landlords who were competing for the lease had complained about the deal.

Triangle Transit purchased the 75,000-square-foot building in December for nearly $3.8 million using money from its general fund, which comes from vehicle registration taxes paid by residents in Durham, Orange and Wake counties.