Coquitlam Heritage Society officially registered as a non-profit on September 25, 1984. They began operating in the lower level (basement) of Mackin House in June 1993. The initial objectives of the CHS were to restore Mackin House and turn it into a heritage house museum. The renovations were completed in 1999 and CHS opened Mackin House Museum to the public.

Today, CHS offers numerous services to Coquitlam’s residents. In addition to yearly exhibits in Mackin House, the CHS offers seasonal tours of the Fraser Mills Train Station and CP Rail 1970’s Caboose in Heritage Square. They also operate year-round as a Tourism Information centre for the City of Coquitlam. Yearly exhibits in Mackin House run from September to June. They also set up rotating exhibits across the community and provide a variety of events and workshops for all ages.

The CHS's collection includes local artifacts of importance as well as the oral histories of community members. Their mission is to preserve, honour and promote Coquitlam’s heritage.