Silverwood Heights is an established northeast neighbourhood along the river, and infill or new-build lots there compete with resale housing that has decades of history behind it, so a builder's asking price reflects current material and labour costs more than it reflects what similar older houses nearby have sold for.
That gap between new-build pricing and resale comparables is exactly the kind of thing an automated estimate misses, since it reads recent sale prices in the area without distinguishing a brand-new build from an older house with an unpermitted addition sitting on the same street.
Pricing new construction correctly means comparing it to other current builds and to what buyers are actually willing to pay over resale, not to the neighbourhood's older housing stock. Get your hand-reviewed valuation from Joel Dyck.