I bought a property and a hidden defect appeared: am I entitled to a price reduction or to undoing the deal?

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You bought the property, received the keys, moved in — and, weeks or months later, what no one had told you appeared: a chronic leak, a structural crack, a serious electrical or plumbing problem, hidden behind a fresh coat of paint. The defect could not be noticed on an ordinary viewing, but it was there the whole time. And now the repair bill — sometimes enormous — seems to have landed in your lap.

The good news is that Brazilian law does not leave the buyer alone with this loss. Material hidden defects receive specific treatment, with remedies ranging from a price reduction to undoing the purchase, and even compensation where the seller has acted in bad faith. The bad news is that these rights are subject to short time limits — and whoever delays in acting may lose them.

This article explains your rights when faced with a hidden defect in the property, the time limits to complain and the possible paths. The cost of inaction is twofold: the repair costs and the loss of the right to claim it against whoever should be liable.

What is a hidden defect (vício redibitório)?

A hidden defect, legally known as a vício redibitório, is one that already existed at the time of the purchase, was not perceptible on an ordinary inspection and renders the property unfit for its intended use or diminishes its value (arts. 441 to 446 of the Brazilian Civil Code). It differs from an apparent defect — which the buyer could have noticed — and from later natural wear and tear.

This rule protects the agreed quality of the property. Where its conditions are met, the seller’s lack of knowledge does not by itself defeat rescission or a price reduction. Knowledge matters for damages under article 443; other liability grounds need separate analysis. An old leak behind fresh paint requires evidence of its cause and pre-existence, not mere suspicion.

What are the buyer's rights?

When faced with a hidden defect, the buyer has, essentially, two main options, and may be entitled to a third:

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If delivery was also delayed, the construction-delay calculator offers an informational estimate for that separate issue; it does not calculate hidden-defect damages.

• a) Rescind the sale (ação redibitória): return the property and seek the applicable repayments under Civil Code articles 441 and 443.
• b) Demand a price reduction (estimatory action / quanti minoris): keep the property, but recover the difference corresponding to the defect (art. 442 of the Brazilian Civil Code).
• c) Losses and damages: if the seller knew of the defect and concealed it (bad faith), they are also liable for losses and damages (art. 443 of the Brazilian Civil Code).

The choice between undoing the deal and a price reduction depends on the seriousness of the defect, the cost of the repair and the buyer's interest in remaining in the property — a decision taken with calculation, not on impulse.

What are the time limits to complain?

Rescission and price-reduction remedies have extinction periods (decadência). For real property, article 445 provides one year from actual delivery; if the buyer already possessed it, time runs from the transfer and is halved. For a defect discoverable only later, STJ interpretation distinguishes manifestation within the statutory guarantee period (one year for real property) from the exercise period running from unequivocal awareness. Discovery does not create a fresh year indefinitely after purchase. Under a contractual warranty, article 446 prevents article 445 periods from running during that warranty, but requires notice to the seller within 30 days of discovery.

There are also distinct situations to consider:

• Structural soundness and safety: article 618 provides a five-year guarantee for qualifying building and substantial-construction contracts. Its sole paragraph contains a 180-day period for the specific remedy; the STJ distinguishes this from the generally ten-year limitation period for contractual damages. Five years is not a universal deadline for every defect action.
• Consumer relationship (CDC): article 26 provides 90 days to complain of defects in durable goods or services; for hidden defects, time starts when the problem becomes evident. A proven complaint to the supplier prevents expiry until an unequivocal negative response. Article 27 provides five years from knowledge of the damage and its author for harmful product or service incidents, not every contractual quality dispute.

Determining which time limit governs your case is a decisive technical step — and the reason to seek advice as soon as the defect appears.

A hypothetical example: the leak that appeared in winter

Hypothetical example: Bruno buys a used, recently refurbished apartment that appears flawless. During the first rainy season, stains and leaks appear; a technical assessment points to an old slab problem predating the refurbishment. The repair estimate is high.

If the defect is proved to be hidden and pre-existing, Bruno may assess a price reduction or rescission; the reduction is not necessarily equal to one repair quotation. Damages require the relevant legal grounds and evidence, without presuming bad faith simply because refurbishment occurred. Photos, a report and dates help identify the deadline and remedy. Notice may encourage settlement, but does not automatically stop every deadline or guarantee compensation.

The most common (and costly) mistakes

• Delaying action and letting the limitation period lapse.
• Failing to document the defect with photos, expert reports and estimates.
• Destroying evidence during repairs without documenting the defect. Urgent safety measures take priority where there is danger; preserve photos, reports and receipts as far as possible.
• Confusing a hidden defect with natural wear and tear or with an apparent defect.
• Failing to check whether the CDC applies (a purchase from a builder), which has its own rules.
• Accepting "verbal agreements" on repairs without formalizing them.

Checklist: how to act when faced with a hidden defect

• Document the defect: photos, videos, dates and, if possible, an expert report.
• Gather estimates for the repair.
• Check whether the purchase was from a builder (possible application of the CDC and the 5-year warranty).
• Identify delivery, manifestation and discovery dates, any prior possession and contractual warranty.
• Notify the responsible party through a channel proving content and receipt; not every case requires a notarial notice.
• Seek advice before destroying evidence or allowing time to expire; do not delay urgent safety measures.

Frequently asked questions about hidden defects in a purchased property

I bought a property with a hidden defect. What can I do?

If the defect is hidden, pre-existing and material (a hidden defect / vício redibitório), you may undo the deal (action to rescind for hidden defect / ação redibitória) or demand a price reduction (estimatory action), under arts. 441 to 446 of the Brazilian Civil Code. If the seller knew of the defect and concealed it, they are also liable for losses and damages (art. 443). The first step is to document the problem and notify the seller — and to do so within the time limit, which is short.

What is the time limit to complain about a hidden defect in a property?

Article 445 generally provides one year from actual delivery of real property; prior possession means time runs from transfer and is halved. For defects manifesting later, the statutory discovery window and the exercise period from awareness must be distinguished under STJ interpretation. Contractual warranties involve article 446 and notice within 30 days of discovery. The CDC and article 618 have their own rules: no single deadline covers every claim.

Is the builder liable for a defect in a new property?

The builder may be liable depending on the cause, contract and applicable regime. Article 618 provides a five-year soundness and safety guarantee for covered works and a specific 180-day period, distinct from the generally ten-year contractual damages limitation recognised by the STJ. Consumer relationships may involve CDC articles 18, 20, 26 and 27. A new property does not remove the need to establish the defect and liability.

In São Paulo, where do I resolve a dispute over a hidden defect in a property?

These civil claims usually proceed in the state courts, within the TJSP system in São Paulo, subject to specific jurisdiction rules. Consumer-protection bodies may also assist where the CDC applies. Notice to the seller may support settlement, but is not a general prerequisite for every action and does not automatically stop time. Technical evidence helps establish the defect’s origin, extent and age.

When should I consult a lawyer about a defect in the property I bought?

Seek advice as soon as a significant problem appears. A lawyer checks the contract, delivery, discovery, defect, applicable rules and appropriate remedy. Preserve evidence before non-urgent repairs; if there is danger, prioritise safety and document what you can. Early action helps protect evidence and deadlines, but does not guarantee the outcome.

The right exists — but there is a window to exercise it

Discovering a serious defect after buying is frustrating, but it does not mean being stuck with the loss. The law offers real paths — price reduction, rescission, compensation — provided the buyer documents the defect and acts within the time limit. The biggest risk here is not the defect itself: it is letting time slip by.

At Falchet e Marques Sociedade de Advogados, a law firm in São Paulo (Av. Paulista), we handle cases of defects in properties — used and new — from the notice to the seller or builder to the action for a price reduction or for undoing the deal.

Talk to our team on WhatsApp: +55 11 95901-1854 — has a hidden defect appeared in your property? Send us photos, expert reports and the contract so we can assess your rights and the time limit.