Brookfield Asset Management Inc. is preparing to kick off the sale of one of the U.K.’s largest student-accommodation businesses amid heightened investor demand for such assets, according to people familiar with the matter.

The infrastructure specialist is working with advisers on the disposal of Student Roost, which could be valued at more than 3.5 billion pounds ($4.7 billion), the people said, asking not to be identified as the matter is private. It will send marketing documents to potential suitors imminently and the sale is likely to attract private equity and strategic bidders, including Blackstone Inc. and Unite Group Plc, the people said.