Trecase: what to know before buying a home
A municipality in the province of Napoli, Campania. Official data on earthquakes, population, services and transport.
Liveability index free for any address
Land sheet 6 free checks
Search for an address in Trecase
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: Via Regina Margherita 1, Trecase.
Trecase, on the southern slopes of Vesuvius
Trecase lies on the southern slopes of Vesuvius, above Torre Annunziata and next to Boscotrecase, of which it was once part. Houses climb from the plain towards the volcano's cone, the lava soils yield wine and vegetables, including Lacryma Christi del Vesuvio, and the upper part of the municipality is inside Vesuvius National Park.
The first thing a buyer needs to know is that Trecase is in the Vesuvius red zone, the area the national emergency plan would evacuate if the volcano showed signs of reawakening. Vesuvius is monitored around the clock by the Vesuvius Observatory of INGV, the national institute of geophysics and volcanology. Regional rules have long restricted new residential building here, so the market consists almost entirely of existing homes. Before buying, check that the property complies with planning rules and whether any amnesty applications for past unauthorised work are still pending.
In 2023 there were 8,501 residents, down 6.8% on 2011 according to Istat, the national statistics office. The estimated average age of 44.4 is above that of the province of Naples (43.2), one of the youngest in Italy; over-65s are 22.7%, against 20.0% in the province. Households average 2.57 people and foreign residents make up 1.4%. Declared incomes are slightly above the provincial average.
For earthquakes, Trecase is in seismic zone 2 of the Civil Protection classification, like 76 of the 92 municipalities in the metropolitan area, with expected acceleration of about 0.149 g. Volcanic tremors are usually weak and shallow; what matters most for a house is its age, its type of structure and the condition of columns and floors.
On the slopes of Vesuvius, heavy rain can send water and mud down the steep streets, and the report checks landslide and flood hazard at the exact address. Revenue Agency (Agenzia delle Entrate) cadastral maps are published, so the plot is found from the address. Overture Maps data show no supermarkets in the municipality, so bigger shopping trips mean going to neighbouring towns.
Key points
- On the southern slopes of Vesuvius, inside the emergency plan's red zone.
- Population down 6.8% since 2011, over-65s at 22.7%.
- Seismic zone 2, expected acceleration about 0.149 g.
- A market of existing homes: check compliance and amnesty files.
Overview
Trecase is a municipality in the province of Napoli, in Campania. At the end of 2023 it had 8,501 residents, ranked 67 of 92 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Trecase 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 0.149 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Trecase, 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 resident population has fallen by 6.8%. The estimated average age is 44 years, in line with the province. 23% of residents are over 65 (the regional figure is 21%). Foreign residents make up 1.4% of the population. On average, a household has 2.6 members.
Income and climate
In tax year 2024, taxpayers in Trecase declared an average taxable income of 22,436 euros, in line with the province (21,545 euros). The Italian average is 24,895 euros.
Trecase is in climate zone C, with 1,297 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 99 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Trecase has 9 schools and 2 pharmacies. The Overture Maps data also lists 3 healthcare facilities, 3 sports facilities and 1 green area.
The data shows no grocery shops and supermarkets within the municipality, against a provincial average of 0.6 per 1,000 residents.
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 27.8% of the land in Trecase, compared with 34.9% in the province and 10.6% in the region. In 2024 built-up land grew by 0.7 hectares.
Radon and contaminated sites
According to the ISPRA map, the estimated radon emission in the municipality is medium. Radon varies from building to building and can only be known by measuring it, especially on ground floors and in basements.
Official databases list no contaminated sites in Trecase.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Trecase: 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 Trecase 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 45 inhabited census areas in Trecase. Half of the residents live in areas scoring 61 or more.
Residents by band
- modest 7.8%
- fair 77.4%
- good 14.8%
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 063091. The text on this page is generated automatically from the data.