A small investment today can prevent big expenses tomorrow. These are seven of the most common problems we find during property inspections in Spain — what to look for yourself, how a professional actually confirms them, and the rough cost range if repairs turn out to be needed.
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| Risk |
Typical Signs |
Diagnostic Techniques |
Estimated Repair Cost |
| 1. Moisture Ingress & Damp |
- Bubbling paint or freshly painted walls
- Musty smell
- Mold behind furniture
- Efflorescence (white salt deposits)
|
- Indoor air moisture testing
- Conductive & contact floor & wall humidity measurements
- Thermal imaging
|
€1K–20K |
| 2. Structural Cracks & Settlement |
- Cracks in walls or foundation
- Leaning retaining walls
- Doors or windows that stick
- Uneven floors, indoor and outdoor
|
- Visual inspection
- Level survey & laser alignment
- Crack width measurement
|
€1K–50K |
| 3. Outdated Electrical Installation |
- Old fuse box, no RCD/GFCI protection
- Burn marks on sockets
- Extension leads used permanently
- Mixed old and new wiring
|
- Distribution board inspection and thermal imaging
- RCD/GFCI testing, socket testing
- Earth continuity checks
- Voltage measurements
|
€2K–8K |
| 4. Poor Insulation & Thermal Bridges |
- Cold interior walls in winter, excessive heat in summer
- Condensation on walls or windows
- High energy bills
- Uneven room temperatures
|
- Thermal envelope survey
- Thermal bridge identification
- Indoor/outdoor temperature comparison
|
€2K–15K |
| 5. HVAC Deficiencies |
- System struggles to cool or heat
- Weak airflow, excessive noise
- Bad odors when operating
|
- Thermal imaging
- Temperature differential measurements
- Airflow assessment
- Equipment sizing review
|
€1K–7K |
| 6. Illegal Alterations |
- Visible construction quality differences between original and altered sections
- Rooms not shown on plans
- Different floor area than advertised
- Different floor levels
|
- Floor area measurement
- Room layout verification, comparison with plans and cadastral records
- Visual construction assessment
|
Varies — depends on whether the alteration can be legalized retroactively or must be reversed |
| 7. Plumbing |
- Low water pressure & flow
- Slow drains
- Sewer odors
- Water meter moving when no water is used
|
- Pressure and flow assessment
- Moisture detection
- Drainage flow testing
- Visual inspection of exposed pipework
|
€1K–10K |
None of these problems are automatically deal-breakers — but each one is worth a proper diagnosis before you commit to a price. An independent technical inspection is what turns "there might be a problem" into a clear answer on what's actually wrong and what it will cost to fix.
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