Discovering an urban discrepancy after the deed means realizing that the purchased property does not match, entirely or in part, what was authorized by the Municipality. This may involve a moved wall, a room with a different intended use, an extension or, in more serious cases, works carried out without the necessary building permit.
It is natural to wonder whether the contract is valid, who should pay for regularization, and whether it is possible to obtain a price reduction or cancel the sale. I will help you distinguish a simple tolerance from a true irregularity, understand which remedies can be used against the seller, and what damages must be proven. The answer does not depend solely on the name given to the violation: what matters is the severity of the discrepancy, the possibility of regularizing it, what was declared, and the actual impact on the value and use of the property.
The discrepancy must first be properly classified
Not every difference constitutes a building violation. The actual state of the property must be compared with the permits filed with the Municipality: building permit, license or building concession, any variants, certified reports and legalization measures. The cadastral floor plan describes the asset for tax purposes, but on its own it does not prove that the works were authorized from an urban planning perspective.
Some deviations fall within the construction or execution tolerances governed by Article 34-bis of the Consolidated Building Act. When the conditions provided for by the rule are met precisely, the deviation does not constitute a building violation. However, it is not enough to informally define it as “minimal”: it is necessary to verify measurements, the date of the works, the characteristics of the intervention and any restrictions. The framework of tolerances can be consulted in Article 34-bis of Presidential Decree no. 380/2001.
Sanable does not mean already regular. A discrepancy may allow for a regularization procedure, but the outcome depends on the applicable rules, original permits, urban and building regulations, and any landscape, seismic or cultural restrictions. A technician's cost estimate alone is not equivalent to a measure from the Municipality and does not guarantee that the application will be accepted.
If regularization is not possible, the removal of the works, restoration of the authorized state, administrative sanctions, and loss of property value may become relevant. This distinction also changes the claim against the seller: a procedure that can be resolved with limited costs does not necessarily produce the same consequences as an unmaintainable extension or a property that cannot be lawfully used as promised.
The deed is not always void
The presence of a discrepancy does not automatically render the contract void. Article 46 of Presidential Decree no. 380/2001 provides, for buildings to which it applies, for the nullity of acts that do not report the seller's declaration with the details of the building permit or legalization permit. The regulation also contains specific rules for confirming the act when the permit existed but its mention was omitted. You can consult the text of Article 46 of Presidential Decree no. 380/2001.
The Joint Chambers of the Court of Cassation have clarified that this is a textual nullity: if the deed indicates a building permit that actually exists and refers specifically to the property, the act remains valid even when the construction presents discrepancies compared to the mentioned permit. The principle is illustrated in the civil review of the Court of Cassation relating to ruling no. 8230 of 2019.
Validity of the deed and seller liability are separate issues. A valid contract may still have been executed incorrectly if the buyer received a property with legal or material characteristics different from those agreed upon. For older buildings, the provisions of Law no. 47 of 1985 and the date of completion of the works may also come into play. Therefore, it is not correct to choose the remedy by looking only at the year indicated in the deed.
Price reduction, contract termination and damages
Price reduction
Price reduction serves to rebalance the exchange when the buyer keeps the property, but the asset is worth less than it would have been worth without the defect. Articles 1490 and 1492 of the Civil Code govern the warranty owed by the seller and the possibility of requesting a reduction, provided that the relevant conditions are met.
The Court of Cassation has recognized this remedy for buyers of a property built in discrepancy with the building concession who had obtained legalization, when the discrepancies were not essential or total. The reference is order no. 11211 of April 28, 2021, reported in the Court of Cassation review on price reduction for building discrepancies.
The cost of legalization does not necessarily coincide with the reduction. To determine how much the price should decrease, factors such as the difference between the value of the promised asset and the one actually transferred, necessary works, administrative charges, and the permanent loss of surface area or functionality may be relevant. If restoration completely eliminates the problem, the reasonable cost of the works can be an important element, but it does not automatically become the sole criterion.
Termination of the sale
Contract termination dissolves the contract and generally entails the return of the property and the price. It is a more incisive consequence than reduction and requires the problem to have a weight that justifies dissolution. Factors that count include the agreed intended use, the part of the asset involved, the possibility of legalization or restoration, and the utility that the buyer can still derive from the property.
A regularizable interior wall is not equivalent to a floor built without a permit or a room sold as a dwelling but not lawfully usable in that manner. Severity does not depend solely on the size of the work: even a limited discrepancy can be decisive if it prevents the expressly agreed use, affects habitability, or exposes the asset to a concrete obligation of restoration.
Delivery of a radically different asset
The delivery of aliud pro alio is an exceptional hypothesis. It occurs when the delivered asset belongs, functionally or legally, to a different category from the one agreed upon or cannot fulfill the essential concrete function for which it was purchased. A generic urban irregularity is not enough: a radical divergence must emerge, evaluated in relation to the contract and the usability of the asset.
In real estate matters, the Court of Cassation has also linked this figure to the lack of the necessary requirement for the lawful enjoyment of a dwelling, while specifying, however, that agreements and any conduct of the buyer are relevant. The classification affects the applicable time limits and therefore should not be chosen solely to avoid the time bars of the warranty for defects.
Compensation for damages
Compensation requires concrete and provable damage. Article 1494 of the Civil Code places compensation on the seller if the seller fails to prove that they ignored the defects of the thing without fault. Depending on the circumstances, necessary technical and administrative expenses, restoration work, uneliminated loss of value, lack of use, and further financial consequences directly linked to the discrepancy may be relevant.
However, not all expenses incurred after the deed are recoverable. They must be necessary, proportionate, and caused by the irregularity pre-existing the sale. The same prejudice cannot be compensated twice: if the price reduction already fully compensates for the loss of value, that same loss cannot be requested again under a different label.
What changes if you knew about the discrepancy
Knowledge of the problem can limit the warranty. Article 1491 of the Civil Code generally excludes the warranty for defects known to the buyer and for easily recognizable ones, unless the seller has declared that the thing was free from defects. However, a distinction must be made between true technical awareness and generic suspicion or the simple material visibility of a work.
Seeing a veranda does not necessarily mean knowing that it lacks a permit. Likewise, a clause by which the buyer declares to know the state of the property does not prove on its own the knowledge of every hidden violation. Relevance is assumed by the precision of the information received, the documents delivered, the declarations contained in the preliminary contract and the deed, and any express assumption of regularization costs.
Clauses limiting the warranty must also be read alongside the seller's behavior. The exclusion does not protect anyone who in bad faith concealed a known problem. If, on the other hand, the discrepancy is clearly described and the price was agreed taking it into account, the purchase cannot be treated as if it concerned a property declared fully compliant.
How damage is proven and the claim is calculated
The starting point is the difference between what was promised and what was delivered. The contract, attached floor plans, urban planning declarations, and communications prior to the deed help establish which characteristics were included in the agreement. The technical comparison with municipal documents clarifies instead which works are authorized and which are not.
The estimate must separate at least three profiles: the cost of possible regularization or restoration, the loss of value remaining after the works, and further economic consequences. A hypothetical building procedure is not enough to quantify the damage. It must be clarified whether the procedure is actually feasible and which works, sanctions, and charges are necessary.
The person who physically carried out the work is also important. If the transformation was carried out by the buyer after delivery, it cannot be blamed on the seller. If it already existed at the time of the deed, its origin, what the seller knew, and the information provided must be reconstructed. Examining the failure to issue habitability, the Court of Cassation excluded compensation when the irregular transformation had been carried out by the buyers themselves.
Time limits require immediate attention
The warranty for defects is subject to short time limits. Pursuant to Article 1495 of the Civil Code, the defect must be reported to the seller within eight days of discovery, barring a different time limit established by the parties or by law; notification is not necessary if the seller has acknowledged the defect or concealed it. The action becomes time-barred, as a rule, within one year from delivery.
“Discovery” does not always coincide with the first doubt. It can become effective when the buyer has sufficient elements to understand the nature and consistency of the problem, but it is advisable not to wait for the completion of every technical verification before contesting it. Timely communication must identify the property, describe the discrepancies that have already emerged, and reserve the right to update the claim.
Different time limits may depend on the legal classification of the matter, for example when discussing the delivery of a radically different asset, specific contractual declarations, or other breaches. However, one must not automatically invoke a more favorable category: if the problem constitutes a normal defect, the time bars and prescription periods provided for that warranty remain applicable.
Choices to be put in order
Before deciding on the remedy, it is necessary to know whether the asset can be regularized. If the discrepancy is a tolerance, the very premise of the contestation may lapse. If it is sanable, keeping the property while requesting a price reduction and any damages may be more consistent. If it is not sanable and compromises essential use, termination takes on greater significance.
It is useful to avoid irreversible work before documenting the state of the premises, except for urgent interventions for safety or to comply with authority orders. Restoring immediately can eliminate important evidence or prevent distinguishing the necessary cost from improvement modifications chosen by the buyer.
To prepare an assessment, the deed and preliminary contract, floor plans, building permits retrieved from the Municipality, technical reports, communications exchanged with the seller, and reasoned estimates are normally useful. These elements serve to link the discrepancy to the sale and to choose between regularization, restoration, price reduction, contract termination, and compensation claims.
Frequently asked questions
Can I ask the seller to pay for legalization?
You can ask for its cost when it constitutes damage attributable to the sale and the procedure is actually feasible. Necessity, amount, and connection with a discrepancy already existing at the time of the deed must be proven. An estimate does not guarantee acceptance of the application and does not automatically include every improvement work chosen after purchase.
Does an urban discrepancy render the deed void?
Not automatically. If the act indicates a real building permit referable to the property, the substantial discrepancy compared to that permit does not alone determine the nullity provided by Article 46 of Presidential Decree no. 380/2001. However, it can ground contractual remedies against the seller, depending on severity, agreements, and buyer knowledge.
Can I obtain both price reduction and compensation?
Yes, if they compensate for different prejudices. The reduction rebalances the price in relation to the lower value of the asset; compensation can cover further proven consequences, such as necessary technical expenses or lack of use. Obtaining reimbursement for the same economic loss twice is not permitted.
If the cadastral floor plan matches the house, am I protected?
Cadastral compliance does not prove urban compliance. The cadastral floor plan must be compared with the actual state, but the legitimacy of the works depends on the building permits and documents kept at the Municipality. A property may appear correctly represented in the cadastre and still present unauthorized works.
How much time do I have to contest the problem?
If the warranty for defects applies, the time limits are very short: ordinarily, eight days from discovery for notification and one year from delivery for the action, with the exceptions provided by Article 1495 of the Civil Code. Since the classification of the problem can change the applicable regime, it is prudent to contest in writing without waiting.
A choice founded on the real severity of the problem
The solution depends on the concrete effect of the discrepancy. Before requesting a sum or contract termination, it must be clarified whether a violation exists, whether it can be removed or regularized, what was promised, and what loss derives from it. If you wish to examine these elements and put possible initiatives in order, you can contact us.