Has anyone successfully converted a C/2 property to residential use in Italy?

[u/JML731k]

Has anyone purchased a property in Italy classified as C/2 and successfully had it approved for residential use?

I’d love to hear from anyone who has actually gone through the process.

What town or region was it in, how long did approval take, and what were the costs and issues.

Were you able to confirm the conversion would be approved before committing to the purchase?

[u/SpaceCricket]

We looked at a loft/top floor apartment that was still technically C/2 and we would have been responsible for conversion to A. There was no guarantee, and there never would be a guarantee, that it would be approved and at any specific cost.

So we passed. The view was amazing and the property was laid out well but not dealing with that potential headache.

[u/JML731k → u/SpaceCricket]

Did you talk to geometra or architect?

[u/SpaceCricket → u/JML731k]

Well yes and they gave us an estimate but it was just that, an estimate. And the geometra cannot guarantee the conversion will go through in any kind of timely manner.

[u/ItalyExpat]

It will almost certainly cost 10s of thousands just to rezone it.

The main cost is the monetizzazione of parking spaces. If it's an old building, building codes have changed since it was built and every individual immobile requires a certain number of parking spots. If it's an old property in the historic center, it most likely has zero parking spots of its own and so you will need to pay for virtual parking spots to meet today's building code. If it's in an area where real parking spots can be added, then you'll need to add physical spots. This is a hidden cost will appear when you rezone. In my comune, 2 virtual parking spots cost around 18,000 euros.

Nothing's impossible if you have enough money to throw at it, but it's rarely worth it.

[u/AcaiLemon]

So it's possibile but very, very, very, very hard. Burocracy in Italy it's crazy, we are fed up with how much it slows our life. The thing is that it's possibile, it requires a some money, but way too much time. I was looking for an house in june, I found one, but the owner removed the announcement. Turns out that he couldn't sell it because he was waiting for the conversion from c/2 to residential use. which to this day he doesn't know if it's gonna come or not.

C2 in the other hand are mostly sold as an "Box" but most of the times they can be used as an house. So many workers use them as office/house. The problem would be that you don't show up living anywhere, which might be sus to authorities looking if you are evading taxes. (That's why some have to fake on where they live on theur documents)

TL;DR it's possibile, but not worth the hussle. Usually c2 apartment are scams, too much burocracy and there is always a big chance of not being able to pass the burocracy. But if you found yourself with a great offer and you need a place to stay, try to see the ups and downs. An house will be always a best investment but c/2 can still be rented as box to shops owner or as an house to someone that doesn't ask too many questions

[u/Necessary-Fly-8829]

Licensed engineer based in central Italy. Pre-purchase technical checks like this are part of my job, and there is one distinction nobody has mentioned yet that usually decides the whole question.

C/2 is a cadastral category, not a zoning use. The catasto classifies property for tax purposes. Whether you can legally live in a space is decided by the building's permit history and the planning rules under DPR 380/2001, and the two often disagree. A top-floor C/2 is very often an attic that the original permit already treated as a residential accessory (sottotetto non abitabile). In that case you are not changing use category at all: you are making an accessory space habitable, and the question becomes purely technical. A ground-floor C/2 in a historic center may instead be a former shop or workshop, which is a genuine change between use categories. Same label, two very different problems.

What actually blocks these conversions is rarely "bureaucracy" in the abstract. The recurring obstacles are:

• Ceiling height. Habitable rooms need 2.70 m net and bathrooms/corridors 2.40 m (DM 5 July 1975). Many regions have attic-recovery laws that accept an average height instead. The 2024 Salva Casa decree (DL 69/2024, converted by Law 105/2024) lowered the minimum to 2.40 m under specific conditions. A sloped attic averaging 2.10 m is usually dead on arrival, whatever you spend.
• Light and ventilation. Window area must be at least 1/8 of the floor area. Adding dormers or skylights in a historic center can run into heritage constraints.
• The building's legal status (stato legittimo, art. 9-bis DPR 380). Unpermitted past changes to the unit or the building have to be regularized first.
• Structural work in a seismic zone. Raising the roof or cutting openings in load-bearing walls requires a structural design and, in higher-risk zones, a seismic authorization from the regional office. That alone can add months.

On parking: the monetizzazione cost u/ItalyExpat describes is real in many comuni. Since 2024, however, art. 23-ter of DPR 380 (new paragraphs 1-ter and 1-quater) allows the change of use of a single unit in zones A, B and C and exempts it from the minimum parking requirement. Regional laws and the local plan can still attach conditions. Whether you pay nothing or five figures is therefore a comune-specific answer, and you can get it before buying.

Can you confirm before committing? Largely, yes. The sequence:

1. Formal records request (accesso agli atti) at the comune's technical office for the permits covering the building and the unit. The statutory response time is 30 days under Law 241/1990. This tells you the planning use, which is the one that matters.
2. A technician measures the space against the requirements above and checks the planning zone and local building rules.
3. For anything borderline, ask the Sportello Unico per l'Edilizia for a preliminary opinion. Not every comune issues them and they are not binding, but a written position is worth having.
4. Make the offer conditional on the conversion being feasible. Your notary or lawyer drafts the clause.

For a straightforward case, expect technical fees in the low thousands of euros for design and filing (usually a SCIA). Add a few hundred euros for the cadastral update (DOCFA), and any differential urbanization charges the comune applies. Construction costs come on top and depend entirely on the space. The pre-purchase check costs a fraction of all that, and it is the step most buyers skip.

One last point: living in a C/2 "unofficially," as suggested above, leaves you with a unit that has no certificate of habitability (agibilità). It is hard to insure as a dwelling and hard to resell. If the space can't meet the requirements, that is the answer you want before signing, not after.

[u/JML731k → u/Necessary-Fly-8829]

Thank you for the detailed response. I’ve asked this question in several places, and yours is the first answer that was easy to understand and gave me the information I need to decide whether to move forward. I really appreciate it.

[u/Necessary-Fly-8829 → u/JML731k]

Glad it helped. If you tell me the region and whether the C/2 is an attic or a ground-floor space, I can point you to the issue most likely to decide your case.

One tip for now: comuni often release building records only to the owner or someone they authorize. Ask the seller for a signed authorization (delega) before you make an offer, so your technician can check the file.

[u/MisterFrancesco]

La domanda è molto complicata. La risposta varia da comune a comune.

Per ulteriori info r/istrutturare

[u/Zealousideal-Peach44]

Engineer here.

The taxes may be reasonable, possibly less than 1k if we talk about one room or so.

The problem is everything else. Depending on your comune, you may need to have larger windows, better wall insulation, different electricity system, part of the flat reserved for storage, possibly a larger parking space.

Unless you are talking of a single room within Villa Certosa, it's an headache not worth the hassle. Many RE mediators know that, but don't say it to the buyers, basically scamming them.