1 in 4
homes has a serious defect that is not visible to the naked eye.
Hidden defects in housing
Spot what's invisible before it becomes your problem
Serious defects that already existed before purchase and aren't visible on a regular visit. A technical inspection lets you identify, assess and decide with confidence.
€10,000
Average cost of defects not detected after purchase.
6 months
Legal deadline to claim hidden defects from the seller.
Technical definition
What is considered a hidden defect
A hidden defect is a serious flaw that already existed at the time of sale, was not detectable to the naked eye and affects the use, safety or value of the property.
Pre-existing
The problem existed before the purchase, even if it shows up months later.
Not visible
Not detectable in a regular visit without technical tools.
Serious
Affects habitability, safety or value of the property.
Unknown
The buyer had no reasonable way of detecting it.
Real cases
Most common hidden defects
We don't just take photos; we interpret thermal data to give you a real, objective diagnosis.
Hidden leaks
Damp on walls, ceilings or floors camouflaged with fresh paint.
8.000 – 25.000 €
Average repair cost
Faulty electrical system
Old wiring or without proper protection.
3.000 – 8.000 €
Average repair cost
Structural cracks
Active fissures in load-bearing walls or ceilings.
15.000 – 60.000 €
Average repair cost
Old hidden piping
Deteriorated installations beneath floors or walls.
15.000 – 60.000 €
Average repair cost
Before buying
Signs that justify a technical inspection
Recent localised paint
Could be covering damp or recent cracks superficially.
Unnecessary false ceilings
May hide installations or structural damage.
Damp smell
Indicator of a possible hidden problem in walls or pipes.
Partial renovations
Localised interventions in specific areas.
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Diagnostic technology
What you can't see in a regular visit
Many defects can only be detected with specific technical tools. That's why our inspections include professional diagnostic technology.
Thermographic camera
Detects invisible damp and thermal bridges.
Professional hygrometer
Measures real moisture inside walls and ceilings.
Electrical tester
Verifies safety and condition of the installation.
360° camera
Full documentation of every room.
Legal deadline
You have 6 months to claim hidden defects
The Civil Code sets a limited period from the delivery of the property. Properly documenting the issue is key to making a successful claim.
Document before repairing
Dated photos and videos before any intervention.
Request a technical report
An architect certifies the defect and its origin.
Notify the seller
Formal communication to start the claim.
Avoid finding out too late
Decide with real information before buying.
A prior inspection detects the same defects that later become hidden flaws.
Real example
Explore a full report
Access a real example and discover how we analyse every detail of the property.
View sample reportQuick contact
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