Terzigno: what to know before buying a home
A municipality in the province of Napoli, Campania. Official data on earthquakes, population, services and transport.
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Search for an address in Terzigno
The report looks at the exact point: landslide and flood risk, seismic zone, price per square metre for the area, services and nearby stops.
For example: Corso Leonardo da Vinci 1, Terzigno.
Terzigno, on the eastern slopes of Vesuvius
Terzigno covers the eastern flank of Vesuvius, between the volcano's cone and the plain that runs down towards the river Sarno. A large part of the municipality lies inside Vesuvius National Park, with pine woods, old lava flows and vineyards, while the town and its outlying hamlets have spread downhill, close to Boscoreale, San Giuseppe Vesuviano and Ottaviano.
The single most important fact for a buyer is that Terzigno is in the Vesuvius red zone, the area that the national Civil Protection plan would evacuate as a precaution if the volcano showed signs of reawakening. Anyone buying here needs to know this, along with the planning rules of the park and the regional law that restricts new residential building here. In the countryside and higher up there are houses from many different periods, so have a surveyor confirm that the property complies with planning and building regulations before you commit.
The population is young. Average age is 41.3, against 43.2 in the province of Naples, over-65s are 16.3% of residents and households have 2.77 people on average. Istat, the national statistics office, counted 17,298 residents in 2023, broadly stable and down 0.4% since 2011. Foreign nationals account for 11.6%, a high share for the Naples area. Average declared incomes are well below the provincial average.
The volcano also brings earthquakes. Terzigno is in seismic zone 2, like 76 municipalities in the province, with expected ground acceleration of about 0.158 g. If you are looking at a masonry house or a 1970s block, ask for the construction date, any structural assessments and what work has been done on floors and roof. Cadastral maps from the Revenue Agency are published, and landslide or flood hazard along the channels running off the mountain is checked address by address.
Key points
- Eastern flank of Vesuvius, inside the evacuation red zone.
- Average age 41.3, against 43.2 in the province.
- Foreign residents at 11.6%, high for the Naples area.
- Seismic zone 2, expected acceleration about 0.158 g.
Overview
Terzigno is a municipality in the province of Napoli, in Campania. At the end of 2023 it had 17,298 residents, ranked 43 of 92 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Terzigno is in seismic zone 2, a zone where strong earthquakes are possible. Most municipalities in the province (76 of 92) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.158 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Terzigno, the building matters a great deal: ask for the design year, whether it met the 2008 seismic standards, and whether any seismic retrofit has been carried out.
Population
Compared with the 2011 census, the number of residents is nearly unchanged. The estimated average age is 41 years, lower than the province average (43). 16% of residents are over 65 (the regional figure is 21%). Foreign residents make up 11.6% of the population. On average, a household has 2.8 members.
Income and climate
In tax year 2024, taxpayers in Terzigno declared an average taxable income of 16,252 euros, below the provincial average (21,545 euros). The Italian average is 24,895 euros.
Terzigno is in climate zone C, with 1,307 heating degree days: heating may be switched on from 15 November to 31 March, for up to 10 hours a day. The same table puts the town hall at 105 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Terzigno has 21 schools and 5 pharmacies. The Overture Maps data also lists 6 grocery shops and supermarkets, 3 healthcare facilities, 6 sports facilities and 1 green area.
There are 0.2 healthcare facilities per 1,000 residents, fewer than the province average (0.6).
Public transport
We do not yet have open public transport timetables for this municipality: the report says so explicitly, without inventing distances.
How built-up it is
Buildings, roads, car parks and other sealed surfaces cover 18.0% of the land in Terzigno, compared with 34.9% in the province and 10.6% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
Official databases list 3 contaminated sites, or sites still under investigation, in Terzigno, and one more has been cleaned up or closed. The report tells you whether one is close to the address.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Terzigno: the report checks the address against the ISPRA maps.
House prices
The Revenue Agency's price ranges per square metre (OMI) apply to zones, not to whole municipalities: the report gives the range for the address's zone.
Land registry
The cadastral maps for Terzigno are public: from the address the report finds the sheet and parcel number.
Liveability area by area
The Vicinalia liveability index runs from 0 to 100 and looks at the place, not the people who live there: services within walking distance, transport, green space, natural hazards, air, quiet, buildings and connection. Here it is worked out at the centre of each of the 42 inhabited census areas in Terzigno. Half of the residents live in areas scoring 61 or more.
Residents by band
- modest 1.0%
- fair 84.8%
- good 14.2%
Vicinalia index by census area, licence CC BY-SA 4.0. Data: IdroGEO ISPRA (2026), Istat, INGV, EEA, AGCOM, Overture Maps and OpenStreetMap.
The colour is the value at the centre of the area. For an exact address, search for it above: the free check looks at that exact point. How the index is worked out
Data sources
- Seismic classification of municipalities, Dipartimento della Protezione Civile. Licence CC BY 4.0, updated to 2025-05.
- MPS04 seismic hazard model, INGV. Licence CC BY 4.0, 2004 model.
- Data by census section, Istat. Licence CC BY 4.0, residents at the end of 2023, compared with the 2011 census.
- Places, Overture Maps Foundation. Licence CDLA Permissive 2.0 and others depending on provider, release 2026-10-21.0.
- Income and main IRPEF variables by municipality, MEF, Dipartimento delle Finanze. Licence CC BY 3.0 IT, tax year 2024.
- Climate zones and heating degree days of municipalities (Presidential Decree 412/1993, Annex A), Normattiva. Licence CC BY 4.0, current text.
- Land take, territorial dynamics and ecosystem services, ISPRA e SNPA. Licence CC BY 4.0, 2024 data.
- Predictive radon map by municipality, ISPRA. Licence CC BY 4.0, version 2022-11.
- Contaminated sites, ISPRA, MOSAICO - Banca dati nazionale dei siti oggetto di procedimento di bonifica. Licence CC BY 4.0, updated to 12 November 2026.
- Liveability index by census area, Vicinalia, from the data in the report sections. Licence CC BY-SA 4.0, worked out on 30 September 2026.
- List of Italian municipalities, Istat. Licence CC BY 4.0, updated to 21 February 2026.
ISTAT code 063082. The text on this page is generated automatically from the data.