In practice that means pulling recently sold homes of a similar size, age and condition from Confederation Park itself or the immediately surrounding area, since a citywide number blends neighbourhoods with very different housing stock and cannot reflect one specific street.
Condition and permitted updating move the number the most. A basement finished or a suite added without a City of Saskatoon permit does not get counted as legal living space, while the identical work done with a permit on file adds real, defensible value.
That distinction between permitted and unpermitted work is exactly what an automated estimate cannot see. Get your hand-reviewed valuation from Joel Dyck.