Brighton's comparable sales are the tricky part, because the neighbourhood is still actively building out. A house compared to a brand-new builder unit rather than a resale property can end up matched to the wrong kind of sale, so pulling 3 to 4 comparable sales, resales rather than builder list prices, is worth doing before assuming the number is too high.
The strongest filings here pull comparable resale properties specifically, not new-construction list prices, since a builder's asking price and an arm's length resale are not the same evidence to the board.
In a fast-changing area like Brighton, the assessment can lag the actual comparable data by a full cycle, which is exactly the gap worth checking. Get your hand-reviewed valuation from Joel Dyck.