North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 621 - Residential buildings
- 62111 - Residential buildings
- 621112 - Residential buildings of fewer than five storeys
- 6211121 - Single-detached houses
- 6211122 - Semi-detached houses
- 6211123 - Row houses
- 6211124 - Duplexes, triplexes and quadruplexes
- 6211125 - Residential buildings of fewer than five storeys, n.e.c.
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