Nutana's age is exactly why a single area-wide number would mislead more than it would help. Buyers come here for the walkability and the architecture along Broadway Avenue and accept older mechanical systems as part of the deal, and a furnace, roof or wiring update changes a specific house's value more than its street does.
Public records capture the sale price of the house next door, not whether that house had its knob-and-tube wiring replaced or its foundation underpinned, so two Nutana homes with similar square footage can be worth noticeably different amounts once real work is accounted for.
Pricing a Nutana home well means comparing it to recent sales of homes with similar age and updates, not to the citywide average. Get your hand-reviewed valuation from Joel Dyck.