Michael J. Maxwell was an architectural consultant whose firm, Michael Maxwell Associates, Inc., consulted the city of Opa-locka in the mid-80s on appraisal and restoration matters. This culminated in a Master Plan for the Restoration of Historic Opa-Locka City Hall, and a Nomination Proposal of several historical sites in Opa-Locka to the National Register of Historic Places. These two documents, as well as the planning materials, are held in the Michael J. Maxwell collection.

The collection also contains other Opa-locka related materials. Included are 1926-1927 Opa-locka price lists, a 1953 charter, copies of the Opa-locka Times from 1926 and 1927, letters including a 1926 letter petitioning for the establishment of a Post Office at Opa-locka, a history of Opa-locka brochure and preparation materials for the brochure, and other items.