The collection consists of material accumulated by the Coquitlam Heritage Society over the course of its existence. The collection includes the following: records related to Fraser Mills (later the Canadian Western Lumber Company, then Crown Zellerbach) including ledger books, journals, statements, photographs, and various other records; records related to the lumber industry in Coquitlam; photographs of historic Coquitlam; glass plate negatives by W.J. Moore and Richard Broadridge; material related to the administration of the Coquitlam Heritage Society itself; and miscellaneous records related to Coquitlam's history

The series consists of photographs from various photographers donated to the Coquitlam Heritage Society by various donors. The photographs feature the following: early life in Maillardville; workers, housing, and machinery at Fraser Mills; renovations of Mackin House; events at Mackin House; houses in Maillardville; and various locations around British Columbia (taken by photographers W.J. Moore and Richard Broadbridge).

The subseries consists of photographs taken of various Chilliwack and Pemberton Meadows farms and vegetation.