01·Valuation foundations

How to Prepare a Data-Supported Property Valuation

A strong property valuation should not rely on one average price per square metre.

1 min readUpdated · July 2026

A strong property valuation should not rely on one average price per square metre. Two apartments in the same district can have significantly different values because of their condition, floor, layout, building quality, orientation, location and current market competition.

A data-supported valuation should include:

  • the property’s key characteristics;
  • similar properties currently on the market;
  • recent price changes;
  • local price per square metre;
  • differences between the subject property and its comparables;
  • current supply and demand;
  • an estimated price range rather than one unexplained number.

The agent’s experience remains essential. Data provides evidence, while the agent interprets the context.

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