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Castiadas: 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 Castiadas

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 Olia Speciosa 1, Castiadas.

Castiadas, the Sarrabus coast and the old penal colony

Castiadas lies in the Sarrabus, on the south-east coast of Sardinia, between the Sette Fratelli mountains and the sea. It is a young municipality, born from the reclamation of land where an agricultural penal colony was set up in the nineteenth century; the old prison buildings can now be visited. Homes are scattered among fields, citrus groves, scrub and coastal spots with beaches that are busy in summer.

The property market follows the seasons: many homes are holiday houses near the sea, lived in during the summer, alongside the houses of year-round residents in the inland hamlets. Cagliari is a long drive along the coast road or the inland route. If you buy near the sea, check the real distance from the beach, coastal landscape restrictions and whether the building is fully authorised. Incomes are in line with the provincial average.

The population is growing: 1,707 residents in 2023, up 13.3% on 2011, according to Istat, the national statistics office. The average age is 48.2, the same as 48.1 in the province, over-65s are 26.7% and foreign residents 2.6%.

All 70 municipalities in the province are in seismic zone 4, the lowest class, and in Castiadas the expected ground acceleration in the built-up area is 0.050 g. What matters more here is salt air on render and on the steel in concrete, and the state of the systems in houses shut up over winter.

The Revenue Agency (Agenzia delle Entrate) cadastral maps are published. The report finds the land parcel from the address and reads the official flood maps, worth checking for houses on the flat land near the streams that run down to the sea.

Key points

  • Sarrabus coast, south-east Sardinia.
  • Residents up 13.3% since 2011.
  • All 70 municipalities in the province in seismic zone 4.
  • Many holiday homes: check coastal rules and permits.

Overview

Castiadas is a municipality in the province of Cagliari, in Sardegna. At the end of 2023 it had 1,707 residents, ranked 44 of 70 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Castiadas 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 grown by 13.3%. The estimated average age is 48 years, in line with the province. 27% of residents are over 65 (the regional figure is 27%). Foreign residents make up 2.6% of the population. On average, a household has 2.0 members.

Income and climate

In tax year 2024, taxpayers in Castiadas declared an average taxable income of 19,149 euros, in line with the province (19,085 euros). The Italian average is 24,895 euros.

Castiadas is in climate zone C, with 921 heating degree days: heating may be switched on from 15 November to 31 March, for up to 10 hours a day. The same table puts the town hall at 60 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Castiadas has 3 schools and 1 pharmacy. The Overture Maps data also lists 3 grocery shops and supermarkets and 4 sports facilities.

The data shows no healthcare facilities within the municipality, against a provincial average of 0.9 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 3.1% of the land in Castiadas, compared with 3.4% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Castiadas 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 Castiadas: 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 Castiadas 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 49 inhabited census areas in Castiadas. Half of the residents live in areas scoring 66 or more.

Residents by band

  • fair 41.8%
  • good 58.2%

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 118008. The text on this page is generated automatically from the data.