Italian Building Permits: CILA, SCIA & Permesso

In thirty years of design work I've learned that the most frequent — and most underestimated — question is never about materials, layout or budget. It's about a piece of paper: "What permit do I need to do this?" It's a technical question, often a dull one, but it decides whether a project starts on solid legal ground or turns into a problem you'll drag behind you for years.

The confusion is understandable, and it's sharper for foreign buyers, because Italy's building titles have similar names, near-identical acronyms (CILA, CIL, SCIA) and a boundary that shifts depending on what you touch: a wall, a floor slab, a volume, a permitted use. Choosing the wrong permit is not a formality. Work carried out under the wrong title — or with no title at all — is an abuso edilizio, an unauthorized building work. And an abuso weighs on the property's value, blocks the sale, worries the banks and, in the worst cases, can force demolition.

This guide is here to bring order. It doesn't replace a site visit from a qualified technician — every property has its own history and every municipality its own detailed rules — but it gives you the map you need to understand what an architect or geometra means when they tell you "this needs a SCIA" or "that's edilizia libera, you can start straight away."

The ladder of building titles

The most useful way to find your bearings is to picture Italy's building permits as a ladder. Each rung corresponds to a more invasive intervention than the one below and, accordingly, to a more demanding procedure. The legal reference is always the same: the Consolidated Building Act, the D.P.R. 380/2001, updated over the years through to the recent changes of the 2024 Salva Casa ("Save the Home") decree.

From the lowest rung to the highest:

1. Edilizia libera ("free building") — no title, no formal notice.
2. CILA — a sworn notice, for extraordinary maintenance without structural changes.
3. SCIA — a certified report, for structural work and work on the building's façade.
4. SCIA alternative to the permesso di costruire (the "Super SCIA") — replaces the permit for certain works.
5. Permesso di costruire — the building permit proper, for new construction and heavy transformations.

The logic is consistent: the more an intervention affects the structure, the volume or the use of the building, the tighter the public control becomes. Working out which rung your project sits on is half the job.

Edilizia libera: when you need nothing

The first rung is edilizia libera, governed by Article 6 of D.P.R. 380/2001 and detailed in the Glossary approved by the Ministerial Decree of 2 March 2018. These are works you can carry out with no permit and no notice to the municipality.

Broadly, edilizia libera covers ordinary maintenance: repainting walls, redoing plaster, replacing floors without changing their levels, swapping out sanitary fixtures, replacing windows and doors while keeping the same shape, size and characteristics, repairing or renewing systems in their existing configuration. To these it adds some minor, removable outdoor works — awnings, pergolas, garden furnishing elements — within the limits set by the Glossary.

The trap of edilizia libera is precisely its apparent simplicity. Many owners, convinced they're "just redoing the bathroom," move a drain, cut a niche into a partition or carve out a closet, and step outside the free-building perimeter without realizing it. The advice never changes: if the work goes beyond simply replacing what's already there, a technician should verify it beforehand, not after.

The CILA: non-structural extraordinary maintenance

The CILA — Comunicazione di Inizio Lavori Asseverata, a Sworn Notice of Works Commencement — is the permit required for extraordinary maintenance and for renovations that do not alter the load-bearing structures, the volumes or the permitted use of the property. It's the title that covers the vast majority of interior apartment renovations.

With a CILA, filed by a qualified technician who certifies (asseverates) that the project complies, you can begin work immediately: there's no waiting period, the site opens the day the notice is filed. The CILA typically covers:

• Moving, removing or building non-load-bearing internal partitions.
• Redoing or upgrading systems (electrical, plumbing, heating).
• Opening or closing internal doors on non-structural walls.
• Replacing windows and doors when it involves changes from the existing ones.

On windows, one technical point often causes confusion: if the replacement changes the shape, size or characteristics of what was there, the simple "like-for-like replacement" logic of edilizia libera no longer applies, and the work must be framed correctly, with the relevant fees paid.

The CILA also has an amnesty function. For internal works already carried out without the required notice — the classic wall moved years earlier without telling anyone — a regularization is available with a fixed penalty of 1,000 euros. It's a modest figure, and one of the reasons it always pays to regularize: the cost of the amnesty is almost always trivial compared with the cost of a non-compliant property at the moment of sale.

The SCIA: when you touch the structure or the façade

Up a rung. The SCIA — Segnalazione Certificata di Inizio Attività, a Certified Report of Commencement of Activity — is required for more complex, structural works. For all intents and purposes it stands in for a building title for the more invasive interventions on the structure or the façade. Unlike the CILA, the SCIA allows variations during the works, which offers valuable flexibility on major renovation sites, where something almost always changes along the way.

The SCIA regime covers, among others:

• Structural works: opening or altering openings in load-bearing walls, redoing or reinforcing floor slabs and the roof.
• External changes: redoing or altering façades — for example opening new windows or adding balconies.
• Heavy internal works: building structural mezzanines and new internal staircases.
• Heavy renovations: change of permitted use without works, and the recovery of attic spaces, provided the overall volume doesn't increase.

A technical point too often forgotten belongs here: when structural works are carried out, the building SCIA is not enough on its own. It requires a separate structural filing, deposited with the competent Genio Civile (the regional structural-works authority), with the calculations and report of a structural engineer or architect. It's a dual track — administrative and structural — that has to be managed in parallel, and ignoring it is one of the most expensive mistakes you can make.

The SCIA can also be used for amnesties. Under Article 36-bis of the Consolidated Act, introduced by the Salva Casa decree, it's possible to regularize, for instance, façade changes, with the charges calculated differently from region to region. And — a significant novelty — even structural works: thanks to Salva Casa, you can regularize works certified as having been executed before 2003, accompanied by a structural survey attesting to their safety. I'll come back to this, because it's the most delicate and most recent part of the law.

The SCIA alternative to the permesso di costruire (the "Super SCIA")

There's an intermediate rung that confuses many people, because it has the word "SCIA" in its name but serves works whose scope approaches that of the building permit. It's the SCIA alternative to the permesso di costruire, colloquially the "Super SCIA."

It's a procedure — again governed by the Consolidated Building Act (D.P.R. 380/2001) — that, for specific urban-transformation works, replaces the traditional building permit. The main practical difference from the ordinary SCIA is timing: with the Super SCIA, work can begin once 30 days have passed from filing the application at the municipality's Sportello Unico per l'Edilizia (SUE, the one-stop building desk), accompanied by a sworn technical report from a professional. So it's not immediate like the "simple" SCIA, but it's leaner than the building permit, which requires an assessment and an explicit issue.

The key point is that the Super SCIA allows the creation of new volumes. That is what sharply distinguishes it from the ordinary SCIA and brings it close to the building permit. Where it applies, it's an efficient tool; but deciding whether a project falls under the Super SCIA or instead requires the full permit is a judgment to leave to the technician, because it depends on the individual municipality's planning instruments.

The permesso di costruire: the permit for heavy transformations

At the top of the ladder sits the permesso di costruire, the building permit provided for under Italian law (again D.P.R. 380/2001) for new construction, for urban restructuring and for "heavy" building renovations that change volumes, silhouettes (sagome) or permitted uses.

Unlike the CILA and the SCIA, which rest on the principle of sworn self-certification and let you start straight away (or nearly), the building permit must be applied for at the municipality through a qualified professional and must be issued by the administration after a technical and planning assessment. It's a change of logic: here you don't report, you request an authorization.

The timelines are correspondingly longer. The municipality normally has 60 days to assess the request and issue the permit, a term that can extend to 120 days for the most complex works. Once that term passes, in the absence of specific constraints, silenzio-assenso ("silence-as-consent") can form: the permit is deemed granted even without an express decision. Once the title is obtained, work must begin within one year of issue and finish within three years, unless a reasoned extension is requested.

Summary table

A quick glance to fix the main differences:

The table is a compass, not a verdict. The real classification of a project always depends on the combination of what you touch (structure, volume, silhouette, use) and how local rules interpret those parameters.

Amnesties and the Salva Casa decree: what changed

The chapter on amnesties has seen the most important changes of the last two years, and it's the one that most directly concerns anyone buying a property that isn't perfectly compliant — a situation that, in Italy, is anything but rare.

The Salva Casa decree (Decree-Law 69/2024, converted into Law 105/2024, in force since 28 July 2024) introduced new tools to regularize minor building discrepancies without resorting to demolition. At the heart of the reform is the new Article 36-bis of D.P.R. 380/2001, which governs the assessment of compliance for partial discrepancies.

The most significant conceptual novelty is the so-called eased double compliance (doppia conformità attenuata). Until Salva Casa, regularizing a work required proving its compliance both with the rules in force at the time of construction and with those in force at the time of the application: a requirement so rigid it made a great many regularizations impossible. Under Article 36-bis, the work must comply with the planning rules in force at the time of the application and with the requirements of the building rules in force at the time of construction. It's a simplification that opens the door to many amnesties previously ruled out.

On timing, the simplified amnesty is faster than you'd expect. For discrepancies that can be cured with a SCIA, a 30-day term applies, after which silenzio-assenso forms; for those requiring a building permit in amnesty, the term is 45 days. Penalties, under 36-bis, are proportionate to the discrepancy rather than fixed and punitive as in the past.

Then there's the opening on structural works mentioned above: Salva Casa allows regularizing works certified as executed before 2003, provided they're accompanied by a structural survey attesting to their safety. It's a concrete possibility for the very many buildings that carry changes layered over time.

The mistakes we see most often

After years of building sites, some mistakes recur with almost predictable regularity. They're worth listing, because knowing them in advance saves time, money and sleepless nights.

Starting work because "it's all internal anyway." This is the most common one. Moving a partition, cutting an opening, embedding a system: they seem harmless, but almost all of them require at least a CILA. Beginning without a title turns a trivial job into an abuso to be regularized.

Confusing the building permit with the structural filing. When you touch a load-bearing wall or a floor slab, the building SCIA is not enough: you need the Genio Civile filing with the structural engineer's calculations. They're two distinct procedures, with two distinct responsibilities. Forgetting the second is dangerous as well as unlawful.

Underestimating constraints. In a historic center, or on a building protected by the Soprintendenza, almost every intervention visible from outside goes through an additional authorization. Discovering this once the process is underway means stopping the site and starting the timelines over.

Buying without checking compliance. This is the most expensive mistake. A property with undeclared discrepancies can turn out to be unsellable or unmortgageable, and the cost of regularization — when it's possible — falls on the buyer. A check of planning and building compliance before the deed costs a fraction of that risk. I discuss this in the guide to renovation costs in Italy too, because compliance is inseparable from budget. For foreign buyers, it belongs on the due-diligence checklist alongside everything in the guide to buying a home in Italy.

Treating bureaucracy as a formality to chase at the end. The building permit is not a box to tick once the site is already open: it's the precondition of the site. In historic-apartment renovations in particular, the correct sequence is checking constraints, design, title, and only then the works — as I explain in the guide to renovating a historic Italian apartment.

How we handle it at ATRIA

The reason we keep architectural design and administrative permit management under one roof at ATRIA is exactly this: the right building title is not a choice separate from the design, it's an integral part of it. A layout that looks brilliant on paper but requires moving an uncatalogued load-bearing wall, or opening a window on a constrained façade, is not a good design: it's a deferred problem.

Our method is to reverse the order in which most people approach the question. First we understand what the building says — its structure, its cadastral history, its constraints — then we draw. We verify the compliance of the as-built state, identify the correct title for each intervention, and manage the building permit and, where needed, the structural filing with the Genio Civile in parallel. The result is a site that starts on solid legal ground and a property that, when the work is done, is compliant and sellable with no surprises.

Knowing which permit you need is not a detail for technicians: it's what separates a calm renovation from a source of problems. If you're weighing an intervention — from simple extraordinary maintenance to a heavy renovation — and you want clarity on the right path before you start, we're glad to talk it through.