On June 25, 2021 the Heritage Calgary board approved the following site to be updated to the Inventory of Evaluated Historic Resources.

Lang House – 228 26 Avenue SW (Mission)
Year Built: 1910

Evaluated as a City-WideHistoric Resource

The Lang House possesses person value for its strong associations with its designer, builder, owner and long-time resident, George Macdonald Lang (1860-1930), an eminent Western Canadian pioneer architect and engineer. Born and trained in Canada, Lang was one of the first registered architects to practice in Calgary. The House is a rare example of a Pre-War home designed by a significant Calgary architect of the same period for his personal residence. (Person Value, City-wide Significance)

The Lang House is valued as a beautifully detailed and crafted one-storey variation of the Foursquare Style in Calgary. (Design Value, City-wide Significance; Style Value, City-wide Significance)

The sole remaining single-family dwelling along 26th Avenue, the Lang House stands apart from the nearby low and mid-rise apartments, presenting a distinctive example of adaptive re-use in Mission. (Symbolic Value, Community Significance)