One of the best tailors in Vancouver is Albert at Albert's Tailor: Albert's Tailor - Downtown Vancouver BC
There are three types of GOOD tailors: Those who do quality alterations, those who know what's stylish and current, those who know what's stylish AND can alter a garment with quality. Albert is the first type. I haven't been able to find the third type in Vancouver.
Albert is super cheap, relatively quick (3pc suit done in a week), and very high quality work. He does, however, come with a few unique traits that you have to be aware of:
1) He never shows up on time. Factor in on him being at least an hour late for opening the shop. Regulars all know this, and we often laugh and go have a coffee together while we wait for him to arrive. Seriously.
2) Albert does amazing work, but don't expect him to tell you how to alter for style, you need to tell him. He can measure, pin, alter to fit without any direction. But cuff, straight leg? You better know what you want.
3) Cash only.