Lisbon inventory shifted in September 2024 — what are you seeing?

Year-on-year comparison helps, but I wouldn’t rely on it alone. The mix could differ each September. A rolling monthly series plus matched-property analysis would show whether the apparent change was brief, gradual or purely compositional.
 
One more definition to settle: does “asking price” mean the original ask or the final advertised ask before removal? The difference between original ask and completion measures the whole marketing process; final ask versus completion is closer to last-stage negotiation.
 
The completed-deal group should also be aligned by when negotiations occurred, as far as the data permits. Grouping solely by completion month risks comparing older buyer decisions with newer seller expectations.
 
For anyone adding local observations, a compact format would help: part of Lisbon, property type, condition, first observed date, asking-price changes, and whether the outcome is confirmed or merely inferred from removal. That keeps anecdotes comparable without pretending they are completed transactions.
 
Use medians as well as averages. A few unusually priced properties can distort an average in a small sample, while the median will at least show whether the middle of the group tells the same story.
 
Regional variation should be shown rather than averaged away. Even if there are too few records to publish separate conclusions, tagging each property by smaller area will reveal whether one cluster is driving the apparent September change.
 
Coming back to this later: was a transaction count ever established for the completed-deal basket? Without it, readers still cannot judge whether 8.5% reflects a broad set of outcomes or a handful of influential records.
 
And two counts are really needed: completed deals and relevant active listings. The first shows how stable the sold-price figure may be; the second shows whether the comparison represents much of the available September inventory.
 
The useful conclusion so far is narrower than the original observation: presented duplexes appeared quicker within one subset, but the 47 days and 8.5% do not yet describe Lisbon as a whole. A dated, deduplicated, area-tagged series with matched transactions would turn this into a testable trend.
 
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