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Silius: what to know before buying a home

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

Liveability index free for any address

Search for an address in Silius

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 Cagliari 1, Silius.

Silius, the fluorite village in the Gerrei hills

For decades the name of Silius was tied to its fluorite mine, which gave work to many people in the area before it closed. The village stands on a hill in the Gerrei, in the interior of south-eastern Sardinia, at around 560 metres, in a landscape of scrub, pasture and rocky hills.

Today Silius lives from farming and livestock, life is quiet, and the main services are in the larger towns, reached by car. Homes are village houses on one or two floors, often with a courtyard, some in stone and others in concrete block. Average declared income is below that of the province of Cagliari, and the climate zone is D.

In 2023 there were 1,015 residents, according to Istat, the national statistics office, down 20.1% on 2011: 256 fewer people. The average age is 49.3 against 48.1 in the province, and over-65s make up 26.8%. Foreign residents are very few, 0.1%, and households have 2.42 members on average.

Earthquakes are not an issue in this part of Sardinia: all 70 municipalities in the province are in seismic zone 4, and the expected ground acceleration in Silius is 0.050 g. For a village house, the roof, damp and the heating and electrics matter most.

Revenue Agency (Agenzia delle Entrate) cadastral maps cover the municipality, and the report reaches the land parcel from the address, checking slope and the official landslide and flood maps for that spot.

Key points

  • Gerrei village tied to its old fluorite mine.
  • Population down 20.1% since 2011, over-65s at 26.8%.
  • All 70 municipalities in the province in seismic zone 4.
  • Village houses with courtyards: check roof, damp and systems.

Overview

Silius is a municipality in the province of Cagliari, in Sardegna. At the end of 2023 it had 1,015 residents, ranked 55 of 70 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Silius is in seismic zone 4, the lowest-risk zone, where strong earthquakes are very rare. All 70 municipalities in the province are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.050 g, a moderate 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 20.1%. The estimated average age is 49 years, in line with the province. 27% of residents are over 65 (the regional figure is 27%). Foreign residents make up 0.1% of the population. On average, a household has 2.4 members.

Income and climate

In tax year 2024, taxpayers in Silius declared an average taxable income of 16,571 euros, below the provincial average (19,085 euros). The Italian average is 24,895 euros.

Silius is in climate zone D, with 1,632 heating degree days: heating may be switched on from 1 November to 15 April, for up to 12 hours a day. The same table puts the town hall at 565 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Silius has 3 schools and 1 pharmacy. The Overture Maps data also lists 1 green area.

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 1.6% of the land in Silius, compared with 3.4% in the region. In 2024 built-up land grew by 1.1 hectares.

Radon and contaminated sites

Silius is one of the municipalities designated as a radon priority area by the Regione Sardegna in 2022. 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.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Silius: 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 Silius 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 4 inhabited census areas in Silius. Half of the residents live in areas scoring 70 or more.

Residents by band

  • good 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 118057. The text on this page is generated automatically from the data.