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Costarainera: what to know before buying a home

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

Liveability index free for any address

Search for an address in Costarainera

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 Provinciale 1, Costarainera.

Costarainera, a hillside on the Riviera dei Fiori

Costarainera is a hill village on the Riviera dei Fiori, the stretch of coast in the province of Imperia between Sanremo and Imperia itself. The houses sit on a ridge at about 200 metres, with the sea in front and olive groves, greenhouses and terraces all around. The coast is a few minutes below, along with the Via Aurelia coast road and the services of the seaside towns.

For buyers, the view and the climate are the main attractions: climate zone D, mild winters and plenty of sunny days. The ground, though, is almost always sloping, roads are narrow and access to houses is not always easy, so check parking, retaining walls and the state of the terraces. The market includes village houses, detached houses with gardens and flats, some used as holiday homes.

At the end of 2023 there were 783 residents, down 2.5% on 2011, so close to stable. The average age is 48.8, the same or nearly so as the province (48.7), and over-65s are 26.6%, against 28.5%. Foreign residents make up 11.4%. Average declared income is above the provincial figure.

Costarainera is in seismic zone 2, like 30 of the 66 municipalities in the province of Imperia; the other 36 are in zone 3. The expected ground acceleration in the built-up area is about 0.150 g, and western Liguria has had strong earthquakes in the past, so for old houses the quality of any structural work matters a great deal.

On the slopes, ground movement is the most useful check: the report reads the official landslide and flood maps for the address. The Revenue Agency (Agenzia delle Entrate) cadastral maps are published.

Key points

  • Ridge village on the Riviera dei Fiori, with sea views.
  • Climate zone D: mild winters.
  • Over-65s at 26.6%, against 28.5% in the province.
  • Seismic zone 2, expected acceleration about 0.150 g.

Overview

Costarainera is a municipality in the province of Imperia, in Liguria. At the end of 2023 it had 783 residents, ranked 31 of 66 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Costarainera is in seismic zone 2, a zone where strong earthquakes are possible. Only 30 of 66 municipalities in the province are in zone 2.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.150 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

For anyone buying in Costarainera, 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 2.5%. The estimated average age is 49 years, in line with the province. 27% of residents are over 65 (the regional figure is 29%). Foreign residents make up 11.4% of the population. On average, a household has 1.9 members.

Income and climate

In tax year 2024, taxpayers in Costarainera declared an average taxable income of 24,152 euros, above the provincial average (21,487 euros). The Italian average is 24,895 euros.

Costarainera is in climate zone D, with 1,645 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 220 metres above sea level.

Services

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

The data shows no schools within the municipality, against a provincial average of 1.0 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 19.0% of the land in Costarainera, compared with 6.4% in the province and 7.3% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Costarainera is not among the radon priority areas designated by the Regione Liguria in 2026. According to the ISPRA map, the estimated radon emission in the municipality is low. Radon varies from building to building and can only be known by measuring it, especially on ground floors and in basements.

Official databases list no contaminated sites in Costarainera.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Costarainera: 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 Costarainera 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 5 inhabited census areas in Costarainera. Half of the residents live in areas scoring 53 or more.

Residents by band

  • modest 13.3%
  • fair 86.7%

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 008024. The text on this page is generated automatically from the data.