: Introduction: Why You Need This Checklist

Buying a home is one of the most important financial decisions of your life. However, 47% of the second-hand properties in Spain have serious technical problems not declared by the seller.

This checklist 50 essential points It will help you detect hidden vices, evaluate the real state of ownership and negotiate with objective information. Created by Aurelio Tamarit Blay, Colegiate Judicial Perito with more than 30 years of experience.

▷✅ Checklist of 50 Points

️ STRUCTURE AND CIMENTATION (Points 1-10)

1. Cracks in loading walls (especially diagonal)
2. Visible strips or inclinations on walls
3. Humidities in basements or low plants
4. State of pillars and beams (without fissures or corrosion)
5. Dilation board in buildings of more than 4 floors
6. Deck/azotea status (without cracks or leaks)
7. Lows and canals in good condition
8. Absence of moisture or mold odors in structural areas
9. Revision of the building book (if any)
10. Consultation of structural incidents in the community

HUMEDADES AND FILTRATIONS (Points 11-20)

11. Moisture blankets in ceilings and walls
12. Persistent odor or moisture
13. Unfinished paint or blisters on walls
14. Condition of bathrooms (sets of tiles, silicone)
15. Extract and ventilation operation
16. Humidities by capillary in low plants
17. State of pipes seen (no oxide or leakage)
18. Evidence of taps and drains (without jams or leaks)
19. Review of water pressure in all taps
20. Wetness repair history check

▪ ELÉCTRIC INSTALATIONS (Points 21-30)

21. Electric table with differential switch and magnetothermals
22. Soil in plugs (outlets)
23. Status of cables and channeling (without loose cables)
24. Contracted power appropriate to housing size
25. Sufficient number of plugs per room
26. Functional lighting in all rooms
27. Switches and pulsers in good condition
28. Absence of sparks or burning odors
29. Current electrical certificate (less than 20 years)
30. Pre-installation for air conditioning or domotic

️ ENERGY EFFICIENCY (Points 31-40)

31. Energy certificate and visible label
32. Windows status (double glazing, thermal bridge breakage)
33. Isolation on walls and ceilings (question the seller)
34. Heating type and boiler length
35. State of radiators or underfloor
36. Sufficient natural ventilation in all rooms
37. Housing orientation (south/east = improved efficiency)
38. Presence of awnings or solar protections
39. Possibility of installing solar plates
40. Estimated energy consumption (request by invoices)

DOCUMENTATION AND LEGALITY (Points 41-50)

41. Simple Note of the updated Property Registry
42. Current inhabitability clause
43. First occupation license (for new work)
44. Energy efficiency certificate in force
45. Latest receipts from IBI and community (without debts)
46. Recent community events (without serious conflicts)
47. Plane of the house coinciding with reality
48. Absence of unpaid charges, embargoes or mortgages
49. Permission of works if there are recent reforms
50. Array contract with protection clauses

How to Use This Checklist

␡️ Red Alert Signs

If you detect any of these problems, seriously consider not buying or demanding professional verification before signing:

• ❌ Structural cracks in diagonal or more than 2mm
• ❌ Humedades activas con moho negro
• ❌ Cuadro eléctrico sin diferencial o con cables expuestos
• ❌ Certificado energético G sin plan de mejora
• ❌ Deudas de comunidad o IBI no declaradas
• ❌ Reformas sin licencia de obras

🔄 ¿Y Si Necesitas Ayuda Profesional?

Esta checklist es una herramienta poderosa, pero no sustituye el criterio de un experto. Si detectas incidencias graves o quieres una evaluación completa:

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