Skip to content
Vicinalia
Italiano Sign up

Sant'Antioco: what to know before buying a home

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

Liveability index free for any address

Search for an address in Sant'Antioco

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 Trento 1, Sant'Antioco.

Sant'Antioco, the Sulcis island linked by a causeway

The island of Sant'Antioco, off south-west Sardinia, has two municipalities: Calasetta in the north and Sant'Antioco, the larger, facing the lagoon towards the mainland. A road on an artificial causeway links the island to the Sulcis area, next to the remains of an ancient Roman bridge. The town is the successor of Phoenician Sulky: in its upper part are the basilica with its catacombs, the tophet, an ancient Phoenician sanctuary, and the archaeological museum.

People make a living from fishing, the harbour, summer tourism and services, and jobs off the island are mainly in Carbonia and the Sulcis industrial area. Buyers find low houses in the centre, often on one or two floors with a courtyard, newer small blocks and, towards the beaches, villas used as holiday homes. Prices follow the distance from the sea and the seafront.

The population is falling and ageing. Istat, the national statistics office, counted 10,601 residents in 2023, down 7.8% since 2011, and the estimated average age has reached 50.9. Over-65s make up 31.9%, above the Sulcis average and well above 26.8% for Sardinia. Households are small, 2.04 people on average, and foreign residents very few, 1.5%. Tourism shows in the 81 bars and restaurants on record.

Earthquake hazard in Sardinia is the lowest in Italy: all 24 municipalities in the province are in seismic zone 4, and the expected ground acceleration in the built-up area is about 0.050 g. In houses near the sea, salt air, damp and the state of roofs and systems matter most.

The Revenue Agency (Agenzia delle Entrate) publishes the cadastral maps, and the report finds the plot from the address. On the coast it is worth checking landscape protection rules and distance from the sea, and in the low areas near the lagoon, flood hazard.

Key points

  • Island linked to the Sulcis, ancient Sulky with a tophet and catacombs.
  • Over-65s at 31.9%, above 26.8% for Sardinia.
  • Population down 7.8% since 2011.
  • Seismic zone 4, the lowest.

Overview

Sant'Antioco is a municipality in the province of Sulcis Iglesiente, in Sardegna. At the end of 2023 it had 10,601 residents, the third most populous in the province.

Earthquakes

For Italy's Civil Protection Department, Sant'Antioco is in seismic zone 4, the lowest-risk zone, where strong earthquakes are very rare. All 24 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 7.8%. The estimated average age is 51 years, in line with the province. 32% of residents are over 65 (the regional figure is 27%). Foreign residents make up 1.5% of the population. On average, a household has 2.0 members.

Income and climate

In tax year 2024, taxpayers in Sant'Antioco declared an average taxable income of 19,404 euros, in line with the province (19,085 euros). The Italian average is 24,895 euros.

Sant'Antioco is in climate zone B, with 772 heating degree days: heating may be switched on from 1 December to 31 March, for up to 8 hours a day. The same table puts the town hall at 10 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Sant'Antioco has 7 schools and 3 pharmacies. The Overture Maps data also lists 10 grocery shops and supermarkets, 5 healthcare facilities, 11 sports facilities and 1 green area.

There are 0.7 schools per 1,000 residents, fewer than the province average (1.1).

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 5.3% of the land in Sant'Antioco, compared with 3.4% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Sant'Antioco is not among the radon priority areas designated by the Regione Sardegna in 2022. 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 Sant'Antioco: 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 Sant'Antioco 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 72 inhabited census areas in Sant'Antioco. Half of the residents live in areas scoring 79 or more.

Residents by band

  • fair 8.5%
  • good 46.0%
  • very good 45.5%

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 119020. The text on this page is generated automatically from the data.