Hidden property defects: how to claim

A hidden defect in a property purchase is a serious defect that already existed at the time of purchase, was not apparent upon a reasonable inspection, and makes the property unfit for its intended use or reduces that use to such an extent that, had you known about it, you would not have bought it or would have paid less. The Spanish Civil Code regulates remedies for hidden defects in Articles 1484 et seq. (consolidated text in the BOE).

Not every defect that appears later is a hidden defect. A leak caused by misuse, normal wear and tear, or a problem that any attentive buyer would have noticed during viewings generally fall outside this framework.

What is practically required to claim for a hidden defect

Pre-existence: the defect was already present at the time of completion, even if you could not see it.
Not apparent: it was not obvious or easily detectable without specialist expertise.
Severity: it significantly affects the use or value of the property, rather than being a minor cosmetic issue.

Common examples in disputes (always assessed case by case) include non-visible structural damp, concealed dangerous installations, structural stability issues, or major defects in the roof. Every case requires evidence, not just suspicion.

Indicative deadline under Article 1490

Article 1490 of the Spanish Civil Code sets out, as the standard rule for remedies regarding hidden defects in goods or real estate, a deadline of six months from the date of handover. In practice, this is a strict limitation period: if you allow this time to pass without taking action, you may lose the right to pursue a claim under this route.

Note: other legal remedies may be available (breach of contract, fraud, consumer protection regulations for certain buyer profiles, construction defects with different timeframes, etc.). Do not rely solely on this article instead of proper legal advice. If in doubt, speak to a lawyer before the clock runs out.

What you can claim (remedies)

Under the regime governing hidden defects, the standard remedies involve:

Rescinding the sale (returning the property and recovering the amount paid, under applicable terms), or
Reducing the purchase price proportionally to reflect the defect.

The specific details depend on the circumstances, the terms agreed in the public deed, and the evidence provided. There is no official scale dictating how much the price should be reduced for each type of defect.

How to make a claim sensibly

Document everything: photos, videos, invoices for temporary repairs, and technical reports.
Handover date: keep the title deed and any formal handover documentation or key delivery receipt with a clear date.
Expert survey: an independent expert report is often the difference between a serious claim and a dispute between neighbours.
Formal notice: this is usually sent in writing to the seller (via burofax or another legally reliable method), describing the defect and setting out your demand.
Negotiation or legal proceedings: an out-of-court settlement is often sought first; failing that, a lawsuit is filed. Procedural and statutory deadlines will not wait for "the seller to reply one of these days".

Prevention when buying property

The best claim is the one you never need to make. Before signing:

Conduct viewings with adequate time and natural light, not just on a Sunday at noon.
Inspect installations, check for potential damp, noise issues, and the overall condition of the building community.
Review the land registry excerpt (nota simple) and encumbrances; if recent building work was carried out, request details of licences and warranties.
Ensure the deposit agreement and title deed accurately describe the condition of the property and what is included.

A property buyer's agent (PSI) acting exclusively for the buyer can help filter properties and coordinate inspections. The strictly legal aspect (formal letters, deadlines, lawsuits) is the domain of lawyers.

Hidden defects versus other issues

Do not confuse claims for hidden defects with liability for construction defects (which have different deadlines and liable parties, often linked to building contractors and developers), nor with general breach of contract (where the property does not match what was agreed regarding floor area, annexes, or condition). Nor should they be confused with ordinary wear and tear or defects that were visible during viewings.

If the seller deliberately concealed a serious problem, different legal actions may apply (including fraud), which carry their own evidentiary standards and timeframes. This is why a lawyer looks at the complete picture: dates, evidence, the nature of the defect, and what was stipulated in the deposit agreement and title deed.

Evidence: the main bottleneck

Without a professional technical report, a claim quickly dissolves into conflicting opinions. The expert surveyor should establish the origin of the defect, its probable pre-existence, and its severity regarding the use of the property. Keep repair quotes: they help quantify the claim, even though a price reduction or contract rescission is not calculated using a published fixed formula.

Avoid intrusive works that destroy evidence before it is properly documented. If there is a structural or safety risk, act sensibly (and seek professional advice), but ensure the prior condition is fully recorded.

Relationship with the deposit contract and title deed

What is stated in the deposit contract and the title deed regarding the condition of the property, renovations, and what was known to the buyer carries significant weight later. If the contract acknowledges visible defects or sells the property "as seen" with specific qualifications, the scope for making a claim changes. This is why we examine these texts in what to legally check in a deposit contract before a dispute arises.

Following completion, note the exact handover date. The timeframe under Article 1490 is calculated from delivery: every week counts. If you discover the defect in month five, do not wait until month seven "to gather more photos".

What we do not promise in an article

There is no definitive list of defects that are "always" considered hidden defects, nor is there a published figure for average compensation. Nor is there a shortcut to bypass providing evidence. What does exist is a clear legal framework (Articles 1484 et seq. and 1490 of the Civil Code) and the necessity of acting promptly with an expert report and sound legal advice.

Private buyers versus alternative legal avenues

This article focuses on sales between private individuals and the remedies under the Civil Code. If you purchased from a developer, or if the defect stems from recent construction work, different timeframes and liable parties may apply (architect, builder, ten-year structural insurance, etc.). Do not mix legal regimes: a lawyer's initial priority is to determine the type of transaction and the completion date of the works.

If you bought as a consumer from a business under certain arrangements, consumer protection law may also offer specific remedies. Once again: tailored analysis, not a standard template.

If the seller is a company or if there is a recent chain of property transfers, keep as many intermediate deeds as possible: they help establish when the defect may have originated and who should be held accountable first.

The cost of failing to act in time

The time limit in Article 1490 is short. Buyers who wait to "see if home insurance covers it" or to "see if the seller acts reasonably" without issuing a formal demand sometimes find themselves out of time to claim for hidden defects. Other legal avenues may remain open depending on the case, but you should not rely on this without professional advice. Document the issue, give formal notice, and seek legal advice as soon as a serious defect appears.

A well-drafted formal notice does not close the door to negotiation: on the contrary, it usually forms the foundation for serious discussions. An informal WhatsApp message, on the other hand, is rarely sufficient proof of a timely claim.

Sky Law in this type of dispute

Sky Law, the group's in-house law firm, has been recognised in the European Legal Awards for Real Estate Law (2023-2025). Under property lawyers, we evaluate whether your case qualifies as a hidden defect, how much time you have left, and which route makes the most sense: formal notice, negotiation, or litigation.

If you have just discovered a serious defect after buying a property, do not wait to "see if it fixes itself". The sooner you have an expert technical report and legal advice, the more options you will retain.