Joel Dyck pulls recent comparable sales in your specific neighbourhood and checks the city's property record against the home's actual features, things like a garage that no longer exists or a basement recorded as developed when it isn't, which are the two most common grounds for a successful assessment appeal.
There is a tradeoff worth knowing before you file. A lower assessment means a lower tax bill, but buyers do look at assessed value as a data point, so a very low assessment can invite lowball offers if you plan to sell within the next couple of years.
Joel can tell you what your home is actually worth before you decide whether an appeal makes sense on its own or as part of a sale. Get your hand-reviewed valuation from Joel Dyck.