"...a jump of 30 to 50 per cent hit most single-family houses “all the way from Squamish clean through to Chilliwack.” 

Here, in Chilly-wack, pulled the assessment (on our 5 yr. old, 2,000 sq. ft. townhouse) from the mailbox yesterday.  it jumped, alright--21% for 2017.  So, a good bit below what's quoted here.  No argument on the assessed value, which is significantly lower than what we paid for the place in November, and a whole lot lower than what we could sell it for sometime this coming year.