Building Violations & Planning Regularisation: Legal Guide 2026
Building Violations and Planning Permission Regularisation: A Complete Legal Guide for Owners and Buyers (2026)
You've just received a purchase offer on a property that convinced you, or you're about to sell your home and the surveyor you hired has just told you there's a discrepancy between the cadastral floor plan and the actual state of the property. Perhaps it's a glazed balcony enclosure added years ago by the previous owner, or a mezzanine built without notifying the local authority. In either case, the word bouncing around in your head is always the same: building violation (abuso edilizio). And with it come the questions: can it be regularised? How much does it cost? Can you still buy or sell? What are the risks if nothing is done?
This guide answers all these questions directly, starting from the applicable rules and working through to everyday practice. CDC Law assists property owners and buyers in complex real estate transactions — including those involving building violations, regularisation procedures and pending amnesty applications — and the analysis that follows reflects the kinds of issues we handle in our day-to-day work.
What Is a Building Violation: Definition, Types and Legal Framework
A building violation is any construction or alteration carried out without the necessary planning permission, or in a manner that deviates from what was authorised. The primary legislative reference is Presidential Decree No. 380/2001 (the Consolidated Building Act — Testo Unico dell'Edilizia), which comprehensively governs planning titles, sanctions and regularisation procedures.
Total Violation: Construction Without a Building Permit
A total violation refers to works carried out entirely without the necessary building permit, or in total departure from the permit granted — for instance, an extension so significant that it bears no relation to the approved plans. Article 31 of D.P.R. 380/2001 addresses this scenario with particular severity: the Municipality issues a demolition order and, if the private owner fails to comply within ninety days, the unauthorised structure is transferred free of charge to the Municipality's public estate. This is not a theoretical threat — the transfer can also cover the surrounding land area necessary to carry out the demolition.
Partial Violation: Deviations from the Granted Planning Permission
A partial violation occurs when works were carried out under a valid building permit but were subsequently modified in ways that partially depart from the approved plans — an extra room, a repositioned wall, an increased ceiling height. Article 34 of D.P.R. 380/2001 allows demolition to be avoided in cases where it would technically compromise the conforming portion of the structure: in such cases a financial penalty equal to twice the production cost of the unauthorised portion, as determined by law, is imposed instead. For unauthorised restructuring works or works in total departure from the permit, Article 33 of D.P.R. 380/2001 establishes a primary obligation to restore the property to its original state.
Regardless of the type, a building violation should never be underestimated or postponed: the consequences multiply and the costs increase over time.
Minor Deviations and Construction Tolerances (Article 34-bis D.P.R. 380/2001)
Not every small discrepancy between plans and the completed work constitutes a legally significant building violation. Article 34-bis of D.P.R. 380/2001, substantially expanded by Decree-Law No. 69/2024 as converted with amendments by Law No. 105/2024 (the so-called Decreto Salva Casa or 'Building Rescue Decree'), introduces construction and execution tolerances: minor deviations that do not constitute building violations and require no regularisation.
The thresholds vary according to the size of the property. For units up to 60 sq m the permitted tolerance is 6% of the design measurements; between 60 and 100 sq m it falls to 5%; between 100 and 300 sq m to 4%; between 300 and 500 sq m to 3%; above 500 sq m to 2%. These tolerances apply to dimensions, volumes, surface areas and the ratios between them. Exceeding the applicable threshold by even a single millimetre eliminates the protection and requires formal regularisation.
How a Building Violation Is Discovered: Urban Planning and Cadastral Checks
Cadastral Compliance vs. Urban Planning Compliance: Why They Are Not the Same Thing
Among the most widespread and costly misconceptions in property transactions, this is arguably the most dangerous: many buyers believe that an updated cadastral floor plan matching the actual layout of the property is sufficient to rule out any problems. It is not. Cadastral compliance (managed by the Revenue Agency — Agenzia delle Entrate) confirms that the floor plan filed with the Land Registry reflects the physical state of the property, but it does not in any way certify that the property was built and authorised by the local authority. Urban planning compliance, by contrast, concerns whether the actual state of the property matches the planning titles granted by the Municipality: building permits, DIA notices, SCIA notices, amnesties. A property can be cadastrally compliant and urbanistically irregular — the violation exists, it simply cannot be seen from the cadastral floor plan.
In our professional experience, this confusion is at the root of a significant share of the post-completion disputes brought to us.
Land Registry Searches, Access to Records and Technical Surveys: The Verification Tools
Verifying a property's urban planning regularity requires operating on multiple levels. The first step is to request from the Municipality the documentation relating to planning titles (building permits, amnesties, regularisations) through access to administrative records. The second is to instruct a qualified professional — a surveyor, engineer or architect — to prepare a urban planning and cadastral compliance report, comparing the actual state of the property with the filed titles. The third is to examine the property's chain of title to verify which planning titles were mentioned in previous deeds, as required by Article 46 of D.P.R. 380/2001. Only by cross-referencing these three levels of verification can a complete picture be obtained.
Navigating building regularization rules can be overwhelming, especially when you fear having made an irreversible mistake. If you have doubts about your specific situation, you can request an initial legal guidance before the matter escalates.
Legal Consequences of Building Violations: Demolition, Sanctions and Voidness of Sale
Demolition Orders and Restoration of the Property (Article 31 D.P.R. 380/2001)
When a total violation is ascertained, the Municipality issues a demolition order pursuant to Article 31 of D.P.R. 380/2001, allowing at least ninety days for compliance. If the private owner does not voluntarily carry out the demolition, the property is transferred free of charge to the Municipal estate — meaning the owner loses title to the property and the surrounding land without receiving any compensation. Demolition is then carried out by the public authority at the cost of the party responsible.
Administrative and Criminal Sanctions for Building Violations
Beyond the consequences affecting the property itself, a building violation exposes the responsible party to both administrative and criminal consequences. On the criminal side, carrying out works without a building permit constitutes a criminal offence prosecuted by the judicial authority. On the administrative side, sanctions vary according to the type of violation: for works subject to SCIA notification carried out without it or in departure from it, Article 37 of D.P.R. 380/2001 provides for financial penalties which can reach significant amounts in proportion to the value of the works.
Voidness of the Sale Agreement: Article 46 D.P.R. 380/2001 and Court of Cassation (Joint Sections) No. 8230/2019
Article 46 of D.P.R. 380/2001 establishes that inter vivos deeds relating to real rights over buildings — or parts thereof — are void if they fail to declare, with respect to works carried out after 17 March 1985, the details of the relevant planning title (building permit, regularisation permit, amnesty). This provision generated years of interpretive uncertainty: is the voidness substantive (the property must actually be compliant) or formal (the title merely needs to be mentioned)?
The definitive answer came with the ruling of the Joint Sections of the Court of Cassation No. 8230/2019: it is formal voidness, not substantive. A deed is void if it omits the mention of the planning title, regardless of the property's actual compliance; but if the title is mentioned — even if the works subsequently prove not to be fully compliant — the deed is valid. This distinction matters in practice: a notary who receives the relevant declaration is required to proceed to completion, but a buyer who subsequently discovers an undisclosed violation may pursue other legal avenues, as described below.
How to Regularise a Building Violation: Sanatoria, Condono and the Building Rescue Decree
Ordinary Compliance Assessment (Article 36 — Double Conformity)
The ordinary regularisation procedure (sanatoria ordinaria) is governed by Article 36 of D.P.R. 380/2001 and is based on the principle of so-called double conformity: an unauthorised work can only be regularised if it was compliant with the urban planning and building regulations in force both at the time it was carried out and at the time the application is submitted. This requirement has made the ordinary regularisation applicable in a limited number of cases, because planning rules change over time and works carried out illegally often do not satisfy both parameters simultaneously.
The procedure involves submitting an application to the Municipality's One-Stop Building Desk (Sportello Unico per l'Edilizia), accompanied by technical documentation certifying double conformity. The Municipality has sixty days to respond; if that period elapses without a response, the application is deemed rejected by implied refusal.
Simplified Compliance Assessment (Article 36-bis — Building Rescue Decree)
The Building Rescue Decree — Decree-Law No. 69/2024 as converted with amendments by Law No. 105/2024 — introduced Article 36-bis of D.P.R. 380/2001, which represents the most significant legislative development of 2024–2025 in the field of building violations. The simplified compliance assessment supersedes the double conformity principle for certain categories of works: it is sufficient that the work complies with the urban planning regulations in force at the time of the application, while for building regulations compliance with the rules in force at the time of construction is sufficient.
In practical terms, many building deviations — carried out in periods when the rules were different — can now be regularised, provided they are compatible with current urban planning. Our firm regularly handles applications under this article, and the experience gathered to date shows that the provision has genuinely resolved situations that previously appeared to have no remedy. The procedure is similar to the ordinary one, but the Municipality's response deadline is forty-five days; here too, silence is equivalent to rejection.
Expanded Construction Tolerances under Decree-Law No. 69/2024
As already discussed in relation to Article 34-bis, the Building Rescue Decree significantly expanded the construction tolerance thresholds. The most significant innovation is that these tolerances can be certified by a simple sworn declaration (dichiarazione asseverata) from a qualified professional, to be attached to the deed of sale: no formal proceedings before the Municipality are required. This tool is already available and has enabled a number of property sales to proceed that previously stalled over minor dimensional discrepancies.
Planning Amnesties: The Three Laws (1985, 1994, 2003) and Why No New Amnesty Can Be Applied For
In the popular imagination, 'filing for a planning amnesty' (fare il condono) is still perceived as a viable option. It is not. Italy has seen three rounds of planning amnesties: the first amnesty under Law No. 47/1985, covering works completed before 1 October 1983; the second amnesty under Article 39 of Law No. 724/1994, for works completed by 31 December 1993; and the third and final amnesty under Article 32 of Decree-Law No. 269/2003, converted by Law No. 326/2003, for works completed by 31 March 2003. No subsequent legislation has provided for further amnesties, and no planning amnesty is in force in 2026.
The so-called '2026 planning amnesty' circulating on certain websites is a distorted reading of the Building Rescue Decree: that legislation introduced new regularisation instruments, not an amnesty. The distinction is fundamental: regularisation (sanatoria) requires urban planning compliance, whereas an amnesty (condono) allowed regularisation of non-compliant works upon payment of a levy (oblazione). They are not the same thing.
Pending Amnesties: Risks and Issues for Owners and Buyers
Numerous properties across Italy have amnesty applications filed in the 1980s, 1990s or early 2000s that the Municipality has never formally resolved. These pending amnesties represent a very dangerous grey area: the application was filed, the levy often paid, but the final decision has never been issued. From a planning perspective, the property remains irregular until the amnesty decision is issued. Purchasing a property with a pending amnesty means purchasing a property burdened by an uncertainty that can drag on for years — and in our experience, this is frequently an element underestimated by both buyers and the estate agents involved in the transaction.
Jurisprudential Regularisation: What It Is and Its Current Status
Jurisprudential regularisation (sanatoria giurisprudenziale) is a construct developed by part of the administrative courts that, in the past, admitted the regularisation of works non-compliant with the rules at the time of construction but compliant with those in force at the time of the application — effectively reversing the double conformity principle. The Constitutional Court and the Council of State progressively curtailed the scope of this approach. With the introduction of Article 36-bis by the Building Rescue Decree, the legislature has codified an explicit statutory solution that largely supersedes the terrain of jurisprudential regularisation, rendering it today of residual and uncertain application.
Building Violations and Property Sales: What to Verify Before Buying
The Notary's Role: Mandatory Checks and the Statement of Planning Titles
The notary has a specific and non-derogable obligation: to include in the deed of sale the details of the property's planning title, as required by Article 46 of D.P.R. 380/2001. If this statement is absent, the deed is void. However, as clarified by the Joint Sections judgment No. 8230/2019, the voidness is formal in nature and concerns the omission of the planning title reference, not a substantive verification of the property's urban planning compliance. A deed can therefore be validly executed in the presence of a building violation, provided the title is mentioned and the seller does not conceal material information.
The Property Lawyer's Role: Contractual Clauses Protecting the Buyer
This is where specialist legal assistance becomes essential. A property lawyer can insert into the preliminary sale agreement and the final deed express termination clauses protecting the buyer in the event that undisclosed building violations emerge before or after completion. The lawyer can also negotiate a price reduction commensurate with the cost of regularisation, or insert conditions precedent making the contract conditional on verification of urban planning compliance. Without these protections, a buyer who discovers a violation after completion will often find themselves forced to litigate — a process that can prove lengthy and costly.
What to Do If a Violation Is Discovered After Completion
If a building violation emerges after the deed has been signed, the available remedies depend on the circumstances. If the seller made false statements or deliberately concealed the violation, the buyer may claim fraudulent misrepresentation (dolo) under the Civil Code, seeking annulment of the contract or damages. If it is a latent defect that the seller was not aware of, Articles 1490–1492 of the Civil Code on the seller's warranty against defects apply: the buyer may seek rescission of the contract (azione redibitoria) or a price reduction (azione estimatoria), within the statutory time limits for forfeiture and prescription. In some cases — for example where the violation affects the usability of the property by imposing limitations the buyer was unaware of — Article 1489 of the Civil Code concerning property burdened by encumbrances or non-apparent third-party rights may also apply.
Practical Examples: Glazed Balcony Enclosures, Habitable Mezzanines, Change of Use
A few recurring examples illustrate how the rules work in concrete situations.
The glazed balcony enclosure: an owner converted an open balcony into an enclosed glazed veranda without any authorisation. This creates an increase in floor area and volume that in many Municipalities requires a building permit. If the enclosure complies with current urban planning rules, it may be regularised under Article 36-bis; if it does not, it must be demolished. If the dimensions fall within the Article 34-bis thresholds, it may not even constitute a legally significant violation.
The habitable mezzanine: a mezzanine built inside a flat without notifying the local authority is a building violation if it exceeds certain dimensional thresholds or if it alters the property's designated use. The regularisation path depends on compliance with applicable building and planning rules.
The change of use: converting commercial premises into residential use, or vice versa, without the necessary planning title is one of the most complex violations to regularise, as it typically involves verifying technical requirements (ceiling heights, floor areas, service facilities) that differ for each designated use.
Costs of Planning Regularisation: Oblazione, Technical Fees and Cadastral Updates
How much does regularising a building violation cost? The answer depends on many variables, but the main cost components can be identified.
The most significant item is the oblazione — the payment owed to the Municipality to obtain regularisation. The amount is determined on the basis of the type of works, the designated use and the floor area or volume subject to regularisation, according to the parameters set by regional and municipal regulations. For minor deviations, the levy may amount to a few hundred euros; for more significant works, it can reach several thousand.
To this must be added the professional fees of the qualified expert (surveyor, engineer or architect) engaged to prepare the documentation and certify compliance: the amount varies according to the complexity of the case. There are also the Municipality's administrative fees, any urbanisation charges that may be due, and finally the costs of updating the cadastral floor plan with the Revenue Agency — necessary to align the cadastral position with the newly regularised configuration.
Building Violations in Condominiums: Liability and Remedies
Legal Actions by the Condominium Against a Unit Owner's Violation
In a condominium context, a single unit owner's building violation may affect common parts or prejudice the rights of other owners. The condominium — through the administrator or by assembly resolution — may formally warn the non-compliant owner and, if no action is taken, bring proceedings to have the unauthorised works removed. Any individual owner may also file a complaint with the Municipality, prompting it to exercise its enforcement powers.
Seller's Liability for Undisclosed Building Violations
A seller who transfers a property with building violations without disclosing them exposes themselves to serious consequences. Under contract law, the seller is liable for warranty against defects pursuant to Articles 1490–1492 of the Civil Code and, if the omission was deliberate, for fraudulent misrepresentation. Under criminal law, the seller may face liability for the criminal offences associated with the violations, particularly if they personally commissioned the works. If false statements were made to the notary concerning the planning titles, criminal liability for false declarations may also arise. A seller's liability does not end at completion: the limitation periods for contractual warranty claims run from the date of discovery of the defect.
The information in this article is for general informational purposes only and does not constitute personalised legal advice.
Have you received a demolition order or are you assessing whether your property can be regularized? Acting promptly can make the difference between resolving your position and losing the asset. Contact CDC Law Studio for concrete legal advice on your building violation case: write to info@cdclaw.org or call +39 06 36306020. Our team will assess the feasibility of the building amnesty and outline the most appropriate defensive strategy for your situation.