AI property valuation: how to value a flat with AI, step by step

AI property valuation tools are increasingly accessible, but using them well means understanding both what they tell you and what they don't. Here is the practical guide to getting the most out of them and not making ill-informed decisions.

Step 1: Enter the right details for the property

The quality of the output depends on the quality of the input. For an accurate valuation you need to provide:

• Exact address: Street, number, floor and door letter. The position within the building (floor, orientation) affects the value.
• Usable floor area: In square metres. Careful: some portals show the built area (which includes walls and shared areas), which is 15-20% larger. The AI needs the usable area.
• Condition: New, good condition, in need of renovation, derelict. Different categories can mean differences of 15-25% in value.
• Relevant extras: Terrace, parking space included, storage unit, lift, communal pool. Each one adds value.
• Energy certificate: Ratings A-B are worth more than F-G, especially with the new European directives.

Step 2: Read the result in context

The AI valuation will give you a price range (e.g. €180,000-210,000) or a single value with a confidence interval. To interpret this result properly:

• A wide range means the AI has few comparables in that area: treat it with more caution
• A narrow range in a liquid market (a big city, an active area) is fairly reliable
• Compare the result with the asking prices on portals of 3-5 similar properties you find in the same area

Step 3: What to do when the valuation and the asking price don't match

If the tool values the property at €180,000 and the seller is asking €210,000, there are three possible explanations: (1) the seller has an aspirational price disconnected from the market, (2) the property has unique features that the AI doesn't capture well (exceptional views, a high-quality renovation), or (3) the AI is out of date for that micro-area. Either way, that gap gives you a basis for negotiating or for investigating further before you decide.

Limitations you need to know about

No AI tool values these well: isolated rural properties, estates with land, properties with heavy mortgage charges or pending litigation, and commercial premises in very specific areas. For these cases, a traditional professional valuation is still the best option.

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