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Decimomannu: 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 Decimomannu

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: Corso Umberto 1, Decimomannu.

Decimomannu, railway junction and air base on the Campidano

Decimomannu is a railway junction. Here the line from Cagliari splits, one branch running north towards Oristano and the rest of the island, the other heading for Iglesias and Carbonia. The town lies on the Campidano plain, about twenty kilometres north-west of the city, on the main road to Iglesias, and its name is also tied to the military airfield used for training by the Italian Air Force and other NATO air forces.

For anyone working in Cagliari the train is a real option, and in recent years new detached and terraced houses have gone up around the centre. Buyers should check where the house stands in relation to the base: on active days aircraft noise is noticeable, and it varies a great deal from one street to the next. In September the feast of Santa Greca draws crowds from the surrounding towns.

The town is younger than the provincial average. In 2023 there were 8,385 residents, up 7.1% on the 7,831 of 2011, according to Istat, the national statistics office; the estimated average age is 45.6 against 48.1, and over-65s make up 20.7%, against 25.7% in the province. Foreign residents account for 2.6%. Shops and cafés are few for a town this size, and many purchases mean a trip to the retail parks on the edge of Cagliari.

Earthquakes are not an issue: all 70 municipalities in the province are in seismic zone 4, the lowest in the Civil Protection classification, and expected acceleration is about 0.050 g. For a house here, insulation and protection from the summer heat matter more.

The Flumini Mannu flows beside the town, on a low plain where streams collect the water after heavy rain. The report checks the official flood maps at the exact address and, using the cadastral maps published by the Revenue Agency (Agenzia delle Entrate), traces the plot.

Key points

  • Rail junction on the Campidano, about twenty kilometres from Cagliari.
  • Population up 7.1% since 2011, over-65s at 20.7%.
  • Military airfield nearby: assess aircraft noise street by street.
  • Beside the Flumini Mannu: check flood hazard for each address.

Overview

Decimomannu is a municipality in the province of Cagliari, in Sardegna. At the end of 2023 it had 8,385 residents, ranked 14 of 70 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Decimomannu 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 7.1%. The estimated average age is 46 years, lower than the province average (48). 21% of residents are over 65 (the regional figure is 27%). Foreign residents make up 2.6% of the population. On average, a household has 2.3 members.

Income and climate

In tax year 2024, taxpayers in Decimomannu declared an average taxable income of 21,755 euros, below the provincial average (24,865 euros). The Italian average is 24,895 euros.

Decimomannu is in climate zone C, with 1,183 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 12 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Decimomannu has 4 schools and 2 pharmacies. The Overture Maps data also lists 3 grocery shops and supermarkets, 2 healthcare facilities and 4 sports facilities.

There are 0.2 healthcare facilities per 1,000 residents, fewer than the province average (0.9).

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 8.3% of the land in Decimomannu, compared with 3.4% in the region. In 2024 built-up land grew by 1.3 hectares.

Radon and contaminated sites

Decimomannu 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 Decimomannu: 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 Decimomannu 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 35 inhabited census areas in Decimomannu. Half of the residents live in areas scoring 71 or more.

Residents by band

  • modest 3.6%
  • fair 11.0%
  • good 85.4%

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 118009. The text on this page is generated automatically from the data.