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Trisobbio: what to know before buying a home

A municipality in the province of Alessandria, Piemonte. Official data on earthquakes, population, services and transport.

Liveability index free for any address

Search for an address in Trisobbio

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 Torino 1, Trisobbio.

Trisobbio, a castle village in the hills near Ovada

Trisobbio is gathered around its medieval castle, on top of a hill in the Alto Monferrato, the hill country around Ovada in southern Piedmont. The old centre is tight, with narrow houses along the lanes that climb towards the tower, while the rest of the municipality is scattered farmhouses and ridge roads. The town hall stands at around 340 metres and the climate zone is E, which means cold winters.

Buyers here are usually choosing between two very different things. In the village there are houses on several floors, with thick walls and little outdoor space; out in the countryside there are farmhouses (cascine) with land, which need constant upkeep and a heating system worth looking at closely. Work, secondary schools and the hospital mean a drive to Ovada, as services in the village are few.

In 2023 Istat, the national statistics institute, counted 647 residents, down 3.6% on the 2011 census. The average age is 52.5, above the 48.9 of the province of Alessandria, and people over 65 make up 33.1% of the population. Households have 1.95 members on average. Average declared income is close to the provincial figure.

For earthquakes, Trisobbio is in seismic zone 3 of the Civil Protection (Protezione Civile) classification, like 126 other municipalities in the province, with an expected ground acceleration of about 0.068 g. In stone and brick farmhouses renovated at different times, ask to see the building permits and find out which parts of the structure were worked on.

The Revenue Agency (Agenzia delle Entrate) cadastral maps cover the whole municipality. For an isolated house on a slope the report adds elevation, gradient and any areas marked on the official landslide hazard maps.

Key points

  • Village built around its castle, in the hills near Ovada.
  • 647 residents, down 3.6% since 2011.
  • Average age 52.5, against 48.9 in the province.
  • Seismic zone 3, expected acceleration about 0.068 g.

Overview

Trisobbio is a municipality in the province of Alessandria, in Piemonte. At the end of 2023 it had 647 residents, ranked 98 of 187 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Trisobbio is in seismic zone 3, a zone where strong earthquakes are possible but rare. Most municipalities in the province (127 of 187) are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.068 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

Even in zone 3, seismic standards apply to new buildings: for an older building, ask about the design year and any structural work.

Population

Compared with the 2011 census, the resident population has fallen by 3.6%. The estimated average age is 53 years, higher than the province average (49). 33% of residents are over 65 (the regional figure is 27%). Foreign residents make up 4.2% of the population. On average, a household has 1.9 members.

Income and climate

In tax year 2024, taxpayers in Trisobbio declared an average taxable income of 24,897 euros, in line with the province (25,143 euros). The Italian average is 24,895 euros.

Trisobbio is in climate zone E, with 2,671 heating degree days: heating may be switched on from 15 October to 15 April, for up to 14 hours a day. The same table puts the town hall at 341 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Trisobbio has 1 pharmacy.

The data shows no schools within the municipality, against a provincial average of 1.0 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 6.1% of the land in Trisobbio, compared with 7.2% in the province and 6.7% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Trisobbio is not among the radon priority areas designated by the Regione Piemonte in 2023. According to the ISPRA map, the estimated radon emission in the municipality is low. 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 Trisobbio.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Trisobbio: 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 Trisobbio 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 12 inhabited census areas in Trisobbio. Half of the residents live in areas scoring 59 or more.

Residents by band

  • fair 100.0%

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

ISTAT code 006176. The text on this page is generated automatically from the data.