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Castelletto Merli: 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 Castelletto Merli

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 Roma 1, Castelletto Merli.

Castelletto Merli, a village in the Monferrato hills

Castelletto Merli is a municipality in the Monferrato hills, in the province of Alessandria, with the village at around 270 metres and a landscape of ridges, small valleys and isolated farmhouses. There is no town right on the doorstep: for work and services people look to Casale Monferrato and Asti, both reached by car.

The property on offer is typical of these hills. There are village houses on two or three floors, often with a courtyard or an outbuilding, and farmhouses with land around them. Before buying, look at how the roof has been kept, whether there are cracks in the walls, what it costs to heat high-ceilinged rooms and what insulation work has been done. The climate is zone E, with cold, damp winters.

In 2023 there were 452 residents, 6.6% fewer than the 484 of 2011. The estimated average age (49.2) and the share of over-65s (29.4%) are close to the provincial figures of 48.9 and 28.6%. Foreign residents make up 5.1%, and declared incomes sit a little below the provincial average.

On earthquake hazard the municipality is in zone 4, the lowest class on the scale kept by the Civil Protection Department, along with 59 other municipalities in the province of Alessandria; the other 127 are in zone 3. Expected ground acceleration is about 0.038 g.

On the hillsides, gradient and landslide hazard can change a great deal from one plot to the next, and the report checks them for the address against the official maps. The Revenue Agency (Agenzia delle Entrate) cadastral maps are available, so the land parcel can be traced too.

Key points

  • Hill municipality in the Monferrato, province of Alessandria.
  • 452 residents in 2023, down 6.6% since 2011.
  • Average age 49.2, close to the provincial figure.
  • Seismic zone 4, expected acceleration about 0.038 g.

Overview

Castelletto Merli is a municipality in the province of Alessandria, in Piemonte. At the end of 2023 it had 452 residents, ranked 128 of 187 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Castelletto Merli is in seismic zone 4, the lowest-risk zone, where strong earthquakes are very rare. Only 60 of 187 municipalities in the province are in zone 4.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.038 g, a low value: the level with a 10% probability of being exceeded in 50 years, on rock.

In zone 4 the risk is low, but for an older building it is still worth asking about the state of the structure.

Population

Compared with the 2011 census, the resident population has fallen by 6.6%. The estimated average age is 49 years, in line with the province. 29% of residents are over 65 (the regional figure is 27%). Foreign residents make up 5.1% of the population. On average, a household has 2.1 members.

Income and climate

In tax year 2024, taxpayers in Castelletto Merli declared an average taxable income of 23,448 euros, below the provincial average (25,143 euros). The Italian average is 24,895 euros.

Castelletto Merli is in climate zone E, with 2,707 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 268 metres above sea level.

Services

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 5.5% of the land in Castelletto Merli, 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

Castelletto Merli 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 Castelletto Merli.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Castelletto Merli: 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 Castelletto Merli 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 19 inhabited census areas in Castelletto Merli. Half of the residents live in areas scoring 54 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 006050. The text on this page is generated automatically from the data.