Skip to content
Vicinalia
Italiano Sign up

Colle San Magno: what to know before buying a home

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

Liveability index free for any address

Search for an address in Colle San Magno

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: Contrada Varciosa 1, Colle San Magno.

Colle San Magno, on the slopes of Monte Cairo

Colle San Magno sits high on the slopes of Monte Cairo, looking over the valley where the river Liri and the main transport routes of southern Lazio run. The valley towns and Cassino are where people go for work, secondary schools and the hospital, driving down winding hillside roads.

The village has lost many residents: 615 in 2023 against 744 in 2011, 129 fewer, or 17.3%, according to Istat, the national statistics institute. The estimated average age is 49.3, against 46.8 in the province of Frosinone, and over-65s make up 30.4%, against 25.4%. Households average 2.24 people. Average declared income is below the provincial average.

For buyers, the most serious issue is earthquakes. Colle San Magno is in seismic zone 1, the highest class in the Civil Protection (Protezione Civile) classification, along with 29 other municipalities in the province, while 59 are in zone 2. Expected ground acceleration in the village is about 0.229 g. For an old masonry house, ask to see the permits for any structural work and have an engineer check the walls, floors and roof before you sign.

On the hillside, the slope varies a lot from one house to the next. The report measures elevation and gradient at the address and checks the official landslide and flood maps, which have to be read plot by plot rather than as an average for the municipality. Winters are climate zone E.

The cadastral maps are published by the Revenue Agency (Agenzia delle Entrate), so the report can go from the address to the land parcel and building.

Key points

  • Hillside village on the slopes of Monte Cairo.
  • Seismic zone 1, expected acceleration about 0.229 g.
  • 615 residents, 129 fewer than in 2011.
  • Over-65s at 30.4%, against 25.4% in the province.

Overview

Colle San Magno is a municipality in the province of Frosinone, in Lazio. At the end of 2023 it had 615 residents, among the smallest in the province (84 of 91).

Earthquakes

For Italy's Civil Protection Department, Colle San Magno is in seismic zone 1, the highest-risk zone, where very strong earthquakes are possible. Only 30 of 91 municipalities in the province are in zone 1.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.229 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.

For anyone buying in Colle San Magno, 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 17.3%. The estimated average age is 49 years, higher than the province average (47). 30% of residents are over 65 (the regional figure is 23%). Foreign residents make up 2.9% of the population. On average, a household has 2.2 members.

Income and climate

In tax year 2024, taxpayers in Colle San Magno declared an average taxable income of 17,820 euros, below the provincial average (21,514 euros). The Italian average is 24,895 euros.

Colle San Magno is in climate zone E, with 2,103 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 540 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Colle San Magno has 1 school and 1 pharmacy.

The data shows no grocery shops and supermarkets within the municipality, against a provincial average of 0.7 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 1.1% of the land in Colle San Magno, compared with 6.9% in the province and 8.2% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Official databases list 2 contaminated sites, or sites still under investigation, in Colle San Magno. 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 Colle San Magno: 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 Colle San Magno 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 14 inhabited census areas in Colle San Magno. Half of the residents live in areas scoring 58 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 060029. The text on this page is generated automatically from the data.