Skip to content
Vicinalia
Italiano Sign up

Roisan: what to know before buying a home

A municipality in the province of Valle d'Aosta/Vallée d'Aoste, Valle d'Aosta/Vallée d'Aoste. Official data on earthquakes, population, services and transport.

Liveability index free for any address

Search for an address in Roisan

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: Frazione Closellinaz 1, Roisan.

Roisan, hamlets at the mouth of the Valpelline above Aosta

Roisan lies at the entrance to the Valpelline, the side valley that climbs north from the Aosta basin. The municipality is made up of hamlets spread across the slopes among meadows and woods, at around 870 metres, with views over the city and the main valley.

Aosta is close: you can work in the city and live in a mountain village with little traffic. Homes are traditional stone and timber houses, often renovated, and newer villas. Winters are those of climate zone F and heating is a significant cost. Average declared income is slightly above the regional figure. In the Aosta Valley, Italian and French have equal status, as the hamlet names show.

There were 1,014 residents in 2023, according to Istat, the national statistics office, 2.7% fewer than in 2011, a modest fall. The population is younger than the regional average: an average age of 45.1 against 47.0, and over-65s at 21.0% against 25.3%. Households have 2.25 members on average and foreign residents account for 3.3%.

All 74 municipalities in the Aosta Valley are in seismic zone 3, and in Roisan the expected ground acceleration is 0.102 g. For a mountain house, snow, insulation and the state of the roof matter as well.

Revenue Agency (Agenzia delle Entrate) cadastral maps are published and the report finds the land parcel from the address. On steep slopes and near streams it also checks the official landslide and flood maps for the exact spot.

Key points

  • Hamlets at the mouth of the Valpelline, close to Aosta.
  • Modest population fall, 2.7% since 2011.
  • Average age 45.1, younger than the region (47.0).
  • All 74 Aosta Valley municipalities in seismic zone 3.

Overview

Roisan is a municipality in the province of Valle d'Aosta/Vallée d'Aoste, in Valle d'Aosta/Vallée d'Aoste. At the end of 2023 it had 1,014 residents, ranked 31 of 74 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Roisan is in seismic zone 3, a zone where strong earthquakes are possible but rare. All 74 municipalities in the province are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.102 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

Even in zone 3, seismic standards apply to new buildings: for an older building, ask about the design year and any structural work.

Population

Compared with the 2011 census, the resident population has fallen by 2.7%. The estimated average age is 45 years, lower than the province average (47). 21% of residents are over 65 (the regional figure is 25%). Foreign residents make up 3.3% of the population. On average, a household has 2.3 members.

Income and climate

In tax year 2024, taxpayers in Roisan declared an average taxable income of 26,500 euros, in line with the province (26,152 euros). The Italian average is 24,895 euros.

Roisan is in climate zone F, with 3,327 heating degree days, with no limits on when heating may be used. The same table puts the town hall at 870 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Roisan has 2 schools.

The data shows no pharmacies within the municipality, against a provincial average of 0.4 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 3.7% of the land in Roisan, compared with 2.2% in the province and 2.2% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Roisan is not among the radon priority areas designated by the Regione Valle d'Aosta in 2026. 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 Roisan.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Roisan: 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 Roisan 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 15 inhabited census areas in Roisan. Half of the residents live in areas scoring 69 or more.

Residents by band

  • fair 32.1%
  • good 67.9%

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 007057. The text on this page is generated automatically from the data.