Italian professional competences
Geometra, architetto or ingegnere: who may sign your project
Italy has three separate registered professions that can handle building work, and their competences overlap without matching. For most jobs the choice is genuinely open and a geometra is the quicker, cheaper route. The moment the work touches the structure, the law narrows who may sign.
The framework
Three registers, and the one question that settles it
Italian building work can be signed by three different regulated professions — geometra, architetto and ingegnere — each on its own public register, with competences that overlap widely but are not interchangeable. I am Ivan Nozzi, a civil engineer in Torrevecchia Teatina (CH), Abruzzo; my Italian title is Ingegnere, and I am on the register of the Ordine degli Ingegneri della Provincia di Chieti, Section A, civil and environmental sector, no. 2489. This page sets out who may sign what, and under which law.
A geometra is registered with the Collegio dei Geometri. The scope is defined by article 16 of Royal Decree 274/1929: measurement and site surveys, cadastral filings, valuations, modest civil constructions and the supervision of those works. That is a broad and genuine competence, and it covers most of what an ordinary owner will ever need to file.
An architetto — architect — is registered with the Ordine degli Architetti. Article 52 of Royal Decree 2537/1925 reserves two things to architects alone: works of significant artistic character, and the restoration of buildings under heritage protection. No other technician may sign the architectural design in those two cases.
An ingegnere in Section A, civil and environmental sector, has the scope set out in article 46 of Presidential Decree 328/2001: design, site supervision and valuation of civil constructions, including everything that requires structural calculation and seismic verification, with no ceiling on the size of the work. Ingegnere is an Italian professional title, conferred in Italy; I practise only in Italy, under Italian law.
So the question that settles the choice is not which title sounds more senior. It is this: does the work touch the structure? If it does not, all three professions may act, and you should choose on availability, familiarity with the local council and cost. If it does, the field narrows and the choice stops being a preference.
The table
Who may sign what
The most common interventions on a house, and who may lawfully sign each one. Where competence is shared, pick whoever suits you: the point of the table is to recognise the few rows where it is not shared.
| Work | Geometra | Architetto | Ingegnere | Notes |
|---|---|---|---|---|
| Internal refurbishment with no structural work | Yes | Yes | Yes | All three may act. What matters here is familiarity with the council's building regulations, not the title. |
| Cadastral filings: DOCFA, first registration, amendments | Yes | Yes | Yes | Core geometra territory, usually completed faster and for less than anyone else would charge. |
| CILA and SCIA for extraordinary maintenance | Yes | Yes | Yes | If the filing includes structural work, that part follows the rows below and is signed separately. |
| Opening a doorway in a load-bearing wall | Limited | Yes | Yes | This is structural work: it needs verification and, in a seismic zone, a prior filing or authorisation. |
| Reinforced concrete structural design | No — save for minor ancillary works | Yes | Yes | Art. 16 R.D. 274/1929 allows a geometra only small ancillary structures needing no particular calculation and posing no danger to persons. |
| Seismic assessment and strengthening of an existing building | No — reserved | Yes | Yes | It requires modelling and verification to NTC 2018. In substance it is structural design. |
| Listed building, or work of significant artistic character | No — reserved | Yes — reserved | Structures and services only, alongside the architect | Art. 52 R.D. 2537/1925 reserves to architects the restoration of protected buildings and works of significant artistic character. |
| Site supervision (direzione dei lavori) | Yes, within the same design limits | Yes | Yes | Supervision follows the design: structural work must be supervised by someone competent to have designed it. |
A summary of the national framework, not advice on a specific case. Competence must always be checked against the actual work, the register the technician is on, and the requirements of the individual comune.
Why Abruzzo
In Abruzzo the distinction bites earlier
Abruzzo is where this distinction stops being theoretical, because its comuni sit in the upper bands of Italy's seismic classification — zone 1, 2 or 3 depending on the location — which pulls work into the seismic regime that elsewhere would stay routine. The band applying to a specific comune has to be checked individually, and it changes what must be filed before work starts.
The building stock compounds it. Most houses sold in the villages of the Chieti and Pescara provinces are in ordinary masonry, built before any seismic code, extended in stages over decades, with floors replaced at different times and by different methods. A building like that has no structural behaviour you can read off the façade. It has to be surveyed and verified.
The sequence that causes trouble is nearly always identical. The job starts as light work, a CILA is filed, and the builders begin. Then someone decides to open a passage between two rooms, or a floor turns out to be rotten, or the roof needs rebuilding — and that single decision moves the job onto structural ground. A signature is now required that the appointed technician may not be able to give, and the site stops at the worst possible moment: after demolition has started.
None of this reflects on anyone's competence or good faith. It is a problem of sequence. The limit is discovered exactly when it is reached, by which point the project has direction and changing it costs money. The only moment when checking is free is before the appointment is made.
A geometra is often the right answer
For cadastral filings, surveys, first registrations, CILA work and anything that leaves the structure untouched, a geometra is fully competent and normally the faster and cheaper option; steering you towards an engineer in those cases would cost you money and add nothing. The distinction only bites when structural calculation, reinforced concrete or seismic verification enter the picture, and that is precisely where I come in. I work alongside geometri and architects rather than in place of them: the geometra handles the cadastre and the filings, the architect the architectural design and protected buildings, and I take the structures and the seismic side. If you already have a technician you trust, the simplest arrangement is that I sign only the part that is closed to them.
Talk it through with meQuestions
What buyers and owners ask me about this
Can I just let the geometra handle everything?
It depends on the work. For cadastral filings, surveys, a CILA for extraordinary maintenance and anything that leaves load-bearing elements alone, a geometra is fully competent and usually the better value. Once the work alters the structure, requires reinforced concrete calculation or involves seismic verification, that competence stops. Only that part needs a different signature; the rest of the file can stay with the geometra.
Who signs the structural calculations?
An ingegnere or an architetto on the register signs the structural design. Article 2 of Law 1086/1971 also admits geometri and periti industriali, but only within their own competence, and for a geometra that limit comes from article 16 of R.D. 274/1929: small ancillary structures needing no particular calculation and incapable of endangering persons. The design is then filed with the Genio Civile office for the area.
Do I need an architect for an internal renovation?
Not necessarily. For an internal renovation of a building with no heritage protection, a geometra, an architetto and an ingegnere may all prepare and sign the design and the planning filing. An architect is indispensable in two situations only: when the building is under heritage protection, and when the work has significant artistic character, under article 52 of R.D. 2537/1925. Outside those, the choice is yours.
What happens if my technician is not competent for one stage?
The file stalls. The council or the Genio Civile can refuse or suspend the filing, and the part that cannot be signed has to be redone by someone competent, with a fresh survey and delay added to time already spent. Italian case law consistently treats an appointment for services beyond a professional's competence as void. In practice, though, the real damage is the stopped site.
Who chooses the direttore dei lavori?
You do, as the client, and the choice is free: the site supervisor need not be the person who prepared the design, and the builder cannot impose one on you. The supervisor must be competent for the works being supervised, so on a structural job the structural supervision belongs to someone competent to have designed it. The appointment is formalised before work begins.
How do I check that a technician is actually registered?
Ask for the full name, the ordine or collegio, the registration number and, for engineers, the section and sector. Engineers appear in the national register held by the Consiglio Nazionale degli Ingegneri and in their provincial Ordine's own list; architects and geometri have equivalent registers. Mine reads: Ordine degli Ingegneri della Provincia di Chieti, Section A, civil and environmental sector, no. 2489, registered since 22 February 2021.
A concrete next step
Not sure which professional your project needs
Send me a description of the work and I will tell you which competence it requires, which signatures it needs and in what order. If the answer is that a geometra is enough, I will say so. Write in English or German if that is easier — I work in Italian, but enquiries in those languages are read and answered.