Property Surveys in Spain: What Inspectors Check and Why It Matters

Spanish property law places the burden of due diligence on the buyer through the principle of caveat emptor (buyer beware). There is no legal requirement for the seller to provide a building condition report, and the notary’s role is limited to verifying title and identity, not physical condition. Spanish mortgage lenders commission a tasación (valuation), but this is a desktop and brief visual assessment focused on market value, not structural integrity. It will not identify damp behind walls, faulty wiring, or foundation issues.

On the Costa del Sol, where many properties were built during the 1980s and 1990s construction boom, building quality varies enormously. Some developments used inferior materials, cut corners on waterproofing, or were built without proper drainage. Others were constructed to high standards but have suffered 30 years of Mediterranean weather without adequate maintenance. In our experience, approximately 1 in 4 resale properties on the Costa del Sol has at least one issue that a survey would flag and that the buyer would want to know about before committing.

The cost of an independent survey (€400 to €1,500) is negligible relative to the purchase price. We have seen clients save €30,000 or more by using survey findings to renegotiate, and we have seen others walk away from purchases entirely after discovering problems that were invisible during viewings. A survey is not a legal requirement; it is a financial protection measure.

A full building survey (known as an inspección técnica or peritaje) covers the property’s structural elements first: foundations, load-bearing walls, beams, columns, and roof structure. The surveyor looks for settlement cracks (common in hillside properties around Nueva Andalucía and Sierra Blanca), roof membrane deterioration, and movement in retaining walls. For villas with pools, the pool shell and surrounding terrace are inspected for subsidence and drainage adequacy.

Damp assessment is critical on the Costa del Sol. Despite the dry climate, rising damp from poor foundations, penetrating damp from flat-roof failures, and condensation damp from inadequate ventilation are all common. The surveyor uses moisture meters on walls and floors, checks for salt deposits (eflorescence), and identifies the source of any damp rather than just its symptoms. Flat-roof properties, very common in southern Spain, are particularly vulnerable: the waterproof membrane typically lasts 15 to 20 years and replacement costs €80 to €120 per square metre.

Electrical and plumbing inspections verify compliance with current regulations (the REBT for electrics, the CTE for plumbing). Older properties often have undersized wiring for modern loads, no earth protection, aluminium rather than copper cabling, or lead water pipes. A full rewire of a 200 m² villa costs €8,000 to €15,000. Replumbing runs €5,000 to €10,000. These are costs you want to know about before agreeing a price, not after you have signed.

New-build properties come with a 10-year structural guarantee (seguro decenal) and a 3-year habitability guarantee under Spanish building law. This might suggest a survey is unnecessary, but in practice we still recommend a snagging inspection before accepting handover. Snagging inspections focus on finish quality: tile alignment, paint coverage, window sealing, plumbing connections, electrical socket placement, drainage falls on terraces, and whether the delivered specification matches the contract.

A professional snagging inspection on a new-build apartment costs €300 to €500; for a villa, €500 to €800. The inspector produces a defects list (lista de repasos) that you present to the developer before signing the final acceptance. Under Spanish law, the developer must remedy these defects before you are obliged to accept handover. We regularly see 20 to 40 defects on a new villa, ranging from cosmetic to functional. Getting these fixed before you accept is far easier than trying to enforce warranty claims afterward.

For resale properties older than 15 years, the full structural survey is essential rather than optional. Properties built before 2006 (when Spain updated building standards under the Código Técnico de la Edificación) may not meet current energy efficiency, waterproofing, or acoustic insulation standards. The survey should quantify the cost of bringing the property to a comfortable modern standard, which then informs your offer price.

The key word is independent. Never use a surveyor recommended by the selling agent or the developer. Their commercial interest is in the sale completing, not in flagging problems. Look for a qualified arquitecto técnico (technical architect) or aparejador registered with the Colegio Oficial de Aparejadores in Málaga. These professionals hold Spanish building qualifications and carry professional indemnity insurance.

Several British-qualified chartered surveyors (RICS members) operate on the Costa del Sol, offering reports in English that follow UK survey standards. This is useful for buyers accustomed to the RICS format and for mortgage lenders who require a survey in English. Expect to pay €600 to €1,500 for a RICS-standard building survey, depending on property size. Spanish-qualified aparejadores typically charge €400 to €800 for an equivalent inspection with a report in Spanish (some offer English translations).

We maintain a list of independent surveyors we have worked with across the Costa del Sol and can provide introductions. When choosing a surveyor, confirm three things: their professional registration number, their insurance coverage, and that they have experience with the specific property type you are buying (a surveyor experienced in apartment complexes may not be the best choice for a hillside villa with extensive terracing and retaining walls).

A nota simple is an extract from the Registro de la Propiedad (Land Registry) that shows the property’s legal status: current owner, registered size, boundary description, and any charges or encumbrances (mortgages, embargoes, usufruct rights, rental agreements). Your lawyer will obtain this as part of standard due diligence. It costs approximately €10 and is available within 24 to 48 hours.

What the nota simple does not tell you: whether the property matches its registered description physically. A villa might be registered as 180 m² but actually contain 220 m² due to unpermitted extensions (very common on the Costa del Sol, particularly in properties from the 1990s). The nota simple also does not reveal the physical condition, energy efficiency, or compliance with current building regulations. It is a legal document, not a technical one.

The gap between the nota simple and physical reality is exactly why a survey matters. Your surveyor measures the actual built area and compares it to the catastral certificate and the nota simple. Any discrepancy signals either an undeclared extension (which may be legalisable under the DAFO process) or an error in the registry. Either way, you need to know before buying, because resolving this after purchase is your problem and your cost.

Some survey findings are negotiation points; others are deal-breakers. Structural movement in load-bearing walls or foundations that shows ongoing progression (active cracks with fresh plaster cracking or increasing width) is a serious red flag. Remediation can cost €50,000 to €200,000+ for underpinning, and some structural failures are not economically viable to repair. Asbestos in roofing materials or insulation (found in properties built before 1990) requires specialist removal at €40 to €80 per square metre, and it cannot legally be left in place during a renovation.

Illegal building works that cannot be legalised are another deal-breaker. On the Costa del Sol, common examples include pools built without a licence, extra floors added without planning permission, and habitable rooms created in basements or garages. If these works fall outside the six-year prescription period for urban infractions but cannot obtain an AFO (Asimilado Fuera de Ordenación) certificate because they violate the general urban plan, the municipality can order demolition at any time.

Flooding risk is underestimated. Properties near dry riverbeds (ramblas) can flood catastrophically during autumn torrential rains (gota fría events). The surveyor checks the property’s relationship to flood risk zones mapped by the Confederación Hidrográfica del Sur. If the property sits within a flood zone, insurance will be difficult to obtain and resale value is permanently impaired.

A detailed survey report with costed remediation recommendations is a powerful negotiation tool. In our experience, presenting a professional report to the seller or their agent results in a price reduction of 60 to 80% of the identified remediation costs on average. Sellers respond to documented evidence far more readily than to verbal claims. The report turns subjective observations into objective, costed facts.

The approach we recommend: your surveyor provides a remediation cost estimate for each identified issue. Your lawyer or agent presents a summary to the seller alongside your revised offer, specifying which items the price reduction addresses. This is factual, not confrontational. The seller can obtain their own quote for the works if they disagree with the figures. Most prefer to agree a price reduction rather than undertake repairs themselves, because a property in mid-transaction has time pressure.

For major issues, consider requesting the seller pay for repairs before completion rather than taking a price reduction. This works well for specific items like roof membrane replacement or rewiring, where you want the work done to a standard you approve. Your surveyor can oversee the remediation and sign off before you complete. This approach gives you a properly repaired property at the original price rather than a discount you might not spend wisely.