The date on the photographs is information
The seasonal blind spot
Most Portuguese listing photography is taken in good conditions, which is also the condition under which the largest category of defect in the national stock is least visible.
When the photographs are usually taken
Dry months
Surfaces are dry, so walls read as sound. Heating is off and ventilation is high, so condensation leaves no trace. A ground floor or semi-basement unit can present as faultless and carry a well established problem.
When the defect expresses itself
After sustained rain, and through the cold months
Rising damp, lateral infiltration through retaining walls and condensation from inadequate ventilation all surface here. Heating runs, ventilation drops, and the wall finally shows what the structure has been doing.
32.1%
of the Portuguese population, INE ICOR 2025
lived in dwellings with damp or infiltrations, rising to 41.8% among the population at risk of poverty. The denominator is population, not homes.
What to do with this. Ask when each photograph was taken. A seller will usually answer without hesitation, because the question sounds administrative. A set of images from the previous summer, offered for a property listed in January, is not evidence of concealment. It is a reason to ask for something more recent, taken to your instruction.