ZURICH, Jan 28 (Reuters) - Holcim Chief Executive Jan Jenisch said a valuation of around $30 billion could be possible for its North American business, which it said earlier on Sunday it plans to spin off and list in the United States.

A valuation "of about $30 billion .. looks in the right ballpark," Jenisch told reporters on Sunday.

(Reporting by John Revill Editing by Bernadette Baum)