The fatal attraction of a property that lacks proper urban planning and cadastral compliance can lead buyers to underestimate the serious risks associated with an imprudent purchase. What may initially appear to be a good opportunity can later become a source of significant legal and financial consequences.

Both sellers and buyers often overlook the impact that irregularities can have on the validity of the transaction, the value of the property, and the parties’ respective liabilities.

What Is Cadastral Compliance?

The concept of cadastral compliance was introduced by Article 19, paragraph 14 of Decree Law No. 78/2010, converted into Law No. 122/2010. In order to validly execute a deed of sale, the property must comply with its cadastral records. Failure to meet this requirement renders the deed null and void.

This means that the cadastral floor plan must accurately reflect the actual layout of the property, including internal walls, openings, and windows. Additionally, the cadastral identifiers, such as sheet, parcel, and subunit, must correspond exactly to those indicated in the title of ownership.

What Is Urban Planning Compliance?

Urban planning compliance requires full correspondence between the property’s actual condition and the building permits and authorisations issued by the municipality, such as the building licence, construction permit, or certified notification of commencement of works (SCIA).

This compliance certifies that the building fully conforms to the approved project filed with the municipality and that there are no unauthorised works or illegal alterations.

It concerns essential aspects such as:

• permitted use of the property,
• height and volume,
• surface area,
• structural configuration,
• distance from property boundaries.

A formal technical certification is required to confirm that the property was constructed or modified in accordance with applicable planning regulations. This document is essential to ensure that the property is lawful and usable without exposure to administrative penalties.

Although urban planning compliance is not always explicitly stated in the deed, it remains fundamental to the validity of the transfer. In its absence, serious consequences may arise, including:

• nullity of the contract (Italian Supreme Court, Civil Division, No. 8230/2019);
• liability claims against the seller or intermediary;
• the need for costly and time-consuming regularisation procedures.

Since 1 July 2010, the law requires all property transfer deeds to include:

• a declaration by the owner confirming cadastral compliance;
• identification of cadastral data and registered floor plans;
• an explicit statement confirming that the floor plan matches the actual property.

If these declarations are missing, the deed is legally null and void.

The consequences of a void deed can be severe and include:

• repayment of the purchase price;
• reimbursement of notarial fees;
• potential litigation for financial and non-financial damages.

The Seller’s Obligations and the Buyer’s Protections

The seller is always responsible for guaranteeing the property’s cadastral and urban planning compliance. This includes providing documentation confirming the property’s lawful status and, where necessary, resolving any irregularities before completion.

Buyers should protect themselves by including specific contractual clauses making the transaction conditional upon verification of full compliance.

It is important to understand that the notary is not responsible for technical verification of compliance. The notary’s role is limited to recording the parties’ declarations and ensuring formal legal requirements are met.

Consequences of Non-Compliance

If irregularities exist, an objective evaluation must be carried out to determine the time, costs, and feasibility of regularisation.

Urban and cadastral compliance is also essential for:

• obtaining mortgage financing;
• accessing tax incentives or building bonuses;
• qualifying for regional or national financial benefits.

Without compliance, financing and incentives may be denied entirely.

Preliminary Agreements and Final Deeds: A Critical Distinction

A property may legally have irregularities at the time of signing the preliminary agreement (compromesso), but it cannot have such irregularities at the time of the final deed of sale.

The preliminary agreement does not transfer ownership; it only obliges the parties to enter into the final contract. Therefore, the presence of irregularities does not invalidate the preliminary agreement, as confirmed by the Italian Supreme Court in judgment No. 13959/2025.

However, if the seller agrees to deliver a compliant property and fails to regularise it within the agreed timeframe, they may be in breach of contract, exposing themselves to:

• termination of the agreement;
• compensation claims;
• liability for damages.

The principle of good faith in contractual performance requires the seller to actively cooperate in resolving compliance issues, especially when necessary for the buyer to obtain financing.

Conversely, the final deed of sale cannot lawfully proceed if cadastral or urban planning irregularities exist. In such cases, the deed is null.

Buyer Awareness and Acceptance Clauses

In some cases, buyers declare that they are aware of irregularities and accept the property in its current condition.

However, generic acceptance clauses do not automatically exempt the seller from liability, especially where irregularities are not specifically identified and quantified in terms of their legal and financial consequences.

Acceptance clauses are effective only when:

• the irregularities are clearly described;
• the costs and time required for regularisation are estimated;
• the parties explicitly consider these factors when agreeing on the purchase price.

When properly structured, such clauses can provide legal certainty and reduce the risk of future disputes.

The Role of the Notary and Legal Advisors

The notary plays an essential legal role but is not a technical expert in construction or planning compliance. The notary must verify that the required legal declarations are included in the deed, but cannot assess the technical accuracy of the property’s compliance.

Similarly, a lawyer assists the parties in structuring the contract properly, ensuring appropriate clauses and protections are included.

Seller Liability and Compensation for Damages

Under Article 1489 of the Italian Civil Code, the seller is liable if the property is affected by hidden legal defects or burdens that reduce its value or usability. This includes undisclosed cadastral or urban planning irregularities.

Compensation may include:

• costs of regularisation;
• loss of property value;
• administrative and legal expenses.

The limitation period for compensation claims is ten years from the discovery of the irregularity.

Conclusion

Not every property offered for sale can be lawfully or safely purchased. What appears to be an attractive opportunity may conceal serious legal and financial risks.

Protecting your interests requires careful due diligence and professional assistance. The guidance of an experienced real estate lawyer and qualified technical professionals can transform a potential legal nightmare into a secure and successful investment.