Do you need a liquor license for a backyard wedding BC?

If you are hosting an event where liquor will be sold at a location that is not licensed OR where liquor will be served or sold in a public space, you will need a licence. Events held at private residences or licensed establishments do not require Special Event Permits.

Do you need a license to serve alcohol in BC?

What is Serving It Right and Who Needs SIR Certification? Serving It Right certification is required by BC liquor licensees, managers and servers who sell or serve liquor in businesses with the following types of licenses: Food Primary (restaurants that serve alcohol)
LDB purchases Licence fee
$12,500 or less $ 250
Over $ 12,500 and up to $ 20,000 $ 500
Over $ 20,000 and up to $ 45,000 $ 825
Over $ 45,000 and up to $100,000 $1,100