A practical method is to build a small comparison table: completed price, internal area, floor, outdoor space, parking, condition, service charges and distance from this flat. Adjust parking separately rather than burying it in the per-m² figure. Then run condition sensitivities rather than...
I’m not convinced condition should be adjusted before the description is clarified. “New-build,” “average condition” and “dated finishes” do not naturally point in the same direction. Is it newly completed, a recent building with an older specification, or a resale being marketed as new-build...