This series is located in Vancouver, British Columbia. However, several times in many episodes they refer to American ties IE: Kera coming from Seattle, Washington (which if she was it would make her an immigrant) or working with the FBI which is a US agency. (Canada has a similar agency with a different name)
Apparently, Alec (Erik Knudsen) to Alec (William B. Davis) height grew up 21 cm (8.3 inches) when he got older and became taller than Kiera.