Skip to content
Vicinalia
Italiano Sign up

Bionaz: 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 Bionaz

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 Les Dzovennoz 1, Bionaz.

Bionaz, at the head of the Valpelline above sixteen hundred metres

At the far end of the Valpelline, above sixteen hundred metres, Bionaz is the last municipality in the valley before the glaciers and ridges that close it off. Its territory is large and almost entirely high mountain, with hamlets strung along the road, pastures, larch woods and the Place-Moulin reservoir further up. Aosta is the reference for hospital, secondary schools and offices.

Buying here means choosing real mountain life. Long winters (climate zone F), snow and roads that need care in winter: check insulation, the roof and the heating system before anything else. In the Aosta Valley, each municipality keeps maps of areas where building is restricted because of landslides, floods and avalanches, so ask the town hall where the property falls, as well as reading the official maps that the report checks for the address.

Istat, Italy's national statistics office, counted 222 residents in 2023, against 234 in 2011, a fall of 5.1%. The estimated average age is 47.7, close to the regional 47.0, and over-65s make up 25.2%. Declared incomes are below the Aosta Valley average. Places to eat number 22.52 per 1,000 residents against 9.39 across the region.

All 74 municipalities in the Aosta Valley are in seismic zone 3 on the Civil Protection Department's scale; in Bionaz the expected ground acceleration in the built-up area is about 0.115 g. In a stone house, find out how any work on walls and floors was carried out. The Revenue Agency (Agenzia delle Entrate) publishes the cadastral maps, and the report traces the land parcel from the address.

Key points

  • Last municipality of the Valpelline, above sixteen hundred metres.
  • 222 residents in 2023, down 5.1% since 2011.
  • Ask the town hall about restricted areas for landslides and avalanches.
  • Seismic zone 3, like the whole Aosta Valley.

Overview

Bionaz 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 222 residents, ranked 62 of 74 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Bionaz 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 0.115 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 5.1%. The estimated average age is 48 years, in line with the province. 25% of residents are over 65 (the regional figure is 25%). Foreign residents make up 3.2% of the population. On average, a household has 1.9 members.

Income and climate

In tax year 2024, taxpayers in Bionaz declared an average taxable income of 21,323 euros, below the provincial average (26,152 euros). The Italian average is 24,895 euros.

Bionaz is in climate zone F, with 4,641 heating degree days, with no limits on when heating may be used. The same table puts the town hall at 1,606 metres above sea level.

Services

The data shows no schools within the municipality, against a provincial average of 1.7 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 0.3% of the land in Bionaz, 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

Bionaz is one of the municipalities designated as a radon priority area by the Regione Valle d'Aosta in 2026. According to the ISPRA map, the estimated radon emission in the municipality is very high. 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 Bionaz.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Bionaz: 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 Bionaz 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 13 inhabited census areas in Bionaz. Half of the residents live in areas scoring 64 or more.

Residents by band

  • fair 67.9%
  • good 32.1%

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 007010. The text on this page is generated automatically from the data.