Madrid sample: is the 8.1% rise meaningful, and does energy performance affect offers?

Which is why recent completed sales should anchor the price discussion. Listing behaviour explains the path; completions give a better indication of where agreements were reached.
 
Are the €482,100 and €723,100 endpoints original or current asking prices? If one is original and the other current, even the range is not internally comparable.
 
That needs answering before calculation. Every record should retain both values where available, with the same field used for the headline range.
 
The exact-looking prices also make me wonder whether values were converted or mechanically adjusted. If so, preserve the original currency treatment consistently rather than reading significance into the final hundreds.
 
We only know the range is stated in euros, so I would not assume conversion. But Oscar is right that the method behind those precise figures should be recorded.
 
One counterpoint: cleaning forever can become avoidance. Even now, the cautious answer is that this sample cannot separate energy effects from type, condition, location and pricing.
 
Still, the sample can guide what to ask sellers or agents: whether energy concerns appeared before viewing, after viewing, during financing, or in an offer.
 
Phrase those questions neutrally. Asking “Did the poor rating reduce offers?” invites confirmation; asking what objections buyers raised leaves room for other causes.
 
Would cancelled offers be visible anywhere in this exercise? They could matter if buyers initially agree, then retreat once condition or energy implications become clearer.
 
Another useful split is vacant versus occupied, if reliably stated. Presentation, access for viewings and seller flexibility can affect time independently of energy.
 
Only include occupancy when it is clearly available. Otherwise the growing list of partly known variables may give a false impression of precision.
 
This has become more a data-quality thread than an energy thread, but that is appropriate. The original question cannot be answered until the comparison group makes sense.
 
Agreed, though the practical takeaway remains simple: energy performance is likely one part of condition and affordability, not an isolated switch controlling demand.
 
I would distinguish current running-cost concerns from future improvement costs. Buyers may react differently even when both arise from the same energy information.
 
This supports using qualitative notes alongside the numbers. A short reason field for each known reduction, withdrawal or rejected offer could prevent overreading the timeline.
 
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