Achatz Handmade Pie Co. is gearing up for an expansion at the company headquarters in Chesterfield Township.The facility on Commerce Boulevard near 26 Mile Road and Gratiot Avenue will soon undergo a 5,000-square-foot expansion, which will also include the need to hire one or two new employees, said David Achatz, who started the company 21 years ago in Armada with his wife, Wendy.