What to Check Before Buying a Property

Purchasing a property is likely the most significant financial decision of your lifetime. Unlike a vehicle or a luxury item, a property cannot simply be returned if serious problems emerge after completion. Knowing what to inspect — and having the right professional assessment — is not optional: it is essential risk management.

Structural Integrity

The foundations and load-bearing walls of a property are the starting point for any inspection. Look carefully for cracks, particularly diagonal cracks running from the corners of window or door frames, which can indicate differential foundation movement. Check the roof from outside: missing or displaced tiles, sagging ridgelines, and moss growth indicate inadequate maintenance. Inside the loft, look for daylight penetration, water staining on rafters, and any signs of previous repairs that may be masking ongoing problems.

Dampness and Water Infiltration

Water damage is among the most costly and disruptive problems a homeowner can face — and one of the most commonly concealed. In every room, check the base of walls for tide marks, peeling paint, and efflorescence (the white powdery deposits left by moisture migrating through masonry). A persistently damp smell, even in freshly painted rooms, is a significant warning sign. Probe window reveals and exterior wall junctions. In the basement and ground floor, check for standing water or saturated ground, which indicates drainage issues that may require extensive civil engineering to correct.

Electrical Systems

Ask for the electrical compliance certificate (certificat de conformité) and verify when the last inspection was carried out. In France, properties over fifteen years old require an electrical diagnostic as part of the mandatory technical dossier. However, compliance certificates reflect a point-in-time assessment. Look at the consumer unit yourself: is it modern, with adequate circuits and proper earthing? Aluminium wiring, common in properties built between 1965 and 1975, presents a genuine fire risk and typically requires complete replacement.

Plumbing and Heating

Check the boiler's age and service record. Boilers over fifteen years old are approaching end of service life and replacement should be budgeted. Inspect under every sink and behind every toilet for signs of slow leaks. Check water pressure at multiple outlets simultaneously. Ask specifically about the pipe material: polybutylene pipes, used in some construction between the 1970s and 1990s, have a documented failure rate and may require full replacement.

Insulation and Energy Performance

The DPE (Diagnostic de Performance Énergétique) is now mandatory in all French property transactions. A rating of F or G carries serious implications: tenants cannot be charged rent increases on G-rated properties, and progressively stricter regulations are making poor-rated properties difficult to let or sell. Budget energy renovation costs into your offer if the rating is poor, and obtain independent quotes — not the seller's estimates.

Legal and Planning Considerations

Verify the exact cadastral boundaries of the property, particularly for rural or semi-rural land. Check for any servitudes (rights of way) that may constrain how you use the land. Research planning consents on surrounding land — a neighbouring field with building permission changes a property's value and character entirely. Your notary will handle the formal legal checks, but a buyer's agent can flag issues before you reach the notary stage.

Why a Professional Survey Matters

A professional property surveyor sees patterns that untrained eyes miss. They know what a damp metre reading of 18% in a ground-floor wall means. They recognise when freshly applied render is concealing cracked masonry rather than simply decorating it. They can interpret structural movement cracks and distinguish between cosmetic settling and active subsidence.

A pre-purchase inspection typically costs €350 to €700 depending on property size. It is one of the most consistently high-return investments a property buyer can make.