This sub-series contains records related to the building and maintenance of Unitarian House and Channing Hall. It consists mostly of minutes, correspondence, internal reports and financial documents related to the management and maintenance of both buildings, including those related to the remodelling of Channing Hall from 1968 to 1970. It also includes copies of the leases between the Church and the tenants of Unitarian House beginning in 1978. There are also four architectural drawings of Channing Hall from Hugh & Jones Architects, dated June 8, 1914, and a drawing of Unitarian House by Phillip Mason

This series contains records related to the property on the corner of Sherbrooke and Simpson streets. Construction of the main church building and Channing Hall began in October 20, 1906 and the congregation moved in on September 1, 1907. Unitarian House was purchased in September of 1946 and was located at 3419 and 3421 Simpson street, immediately to the north of the main church property. Channing Hall housed a pastor’s study, a kitchen and rooms dedicated to various purposes over the years. It also housed the Sunday school. Over the years 1968 to 1970 Channing Hall underwent a remodelling. After the purchase of Unitarian House, the buildings were subdivided into classrooms for the Sunday school. It was in use by the church until 1978, when it began to be leased to various tenants.
The Church remained at this property until the fire of May 25, 1987, which destroyed the main church building.

The series is comprised architectural drawings related to the construction and renovation of all buildings on the property, including not only the main church building but also Unitarian House and Channing Hall. Beyond this, it also contains other documents related to the property such as surveyor’s reports, deeds, financial reports on building upkeep, meeting minutes, correspondence related to the building, newspaper clippings, as well as photographs and drawings of the buildings.

This series also contains records related to the post-fire response and rebuilding effort. These include meeting minutes, reports on the cost of rebuilding, proposals for rebuilding/moving and opinion polling of the congregation. There is also a small amount of correspondence related to public response to proposed rebuilding projects and newspaper clippings.