Aosta: 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.
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Search for an address in Aosta
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 Saint Martin de Corleans 1, Aosta.
Aosta, a Roman town among the mountains
Aosta is the only capital of Valle d'Aosta, Italy's smallest region, which is also a single province of 74 municipalities. The Romans founded it as Augusta Praetoria, and the Arch of Augustus, the Porta Praetoria gate and the Roman theatre still stand within a street grid that follows the ancient layout. The town fills the floor of the Dora Baltea valley, ringed by mountains, on the road that climbs towards Mont Blanc and the Great St Bernard Pass. Italian is spoken alongside French, an official language of this autonomous region.
At the end of 2023 Aosta had 33,098 residents, 2.9% fewer than in 2011 and 26.9% of the region's entire population. The town is older than the valley around it: an estimated average age of 48.3 against 47, and 28.4% of residents over 65 compared with 25.3% regionally. Foreign nationals make up 9% of the population, and households average 2 people.
Every municipality in Valle d'Aosta is in seismic zone 3, the second-lowest of Italy's four hazard classes. In Aosta's built-up area the expected ground acceleration is about 0.096 g, a moderate value, so with an older building it still makes sense to ask how the structure was designed and maintained.
As the capital of a mountain region, Aosta gathers services for a much wider area. The data show 34 healthcare facilities, 1.03 per 1,000 residents against a regional average of 0.38, and 51 schools, with 261 bars and restaurants recorded. The Revenue Agency (Agenzia delle Entrate) publishes cadastral maps, so the report can find sheet and parcel numbers from the address. Between the valley floor, mountain streams and steep slopes, landslide and flood hazard varies noticeably from place to place: check it for the address, as with local price ranges.
Key points
- The only provincial capital in Valle d'Aosta, a region of 74 municipalities.
- 33,098 residents, 2.9% fewer than in 2011.
- The whole region is in seismic zone 3; about 0.096 g in Aosta.
- Healthcare facilities: 1.03 per 1,000 residents against 0.47 regionally.
Overview
Aosta is the capital of the province of Valle d'Aosta/Vallée d'Aoste, in Valle d'Aosta/Vallée d'Aoste. At the end of 2023 it had 33,098 residents, the most populous municipality in the province. 27% of the province's residents live here.
Earthquakes
For Italy's Civil Protection Department, Aosta 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 0.096 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 2.9%. The estimated average age is 48 years, in line with the province. 28% of residents are over 65 (the regional figure is 25%). Foreign residents make up 9.0% of the population. On average, a household has 2.0 members.
Income and climate
In tax year 2024, taxpayers in Aosta declared an average taxable income of 27,273 euros, in line with the province (26,152 euros). The Italian average is 24,895 euros.
Aosta is in climate zone E, with 2,850 heating degree days: heating may be switched on from 15 October to 15 April, for up to 14 hours a day. The same table puts the town hall at 583 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Aosta has 51 schools and 9 pharmacies. The Overture Maps data also lists 13 grocery shops and supermarkets, 34 healthcare facilities, 28 sports facilities and 6 parks and green areas.
There are 1.0 healthcare facilities per 1,000 residents, more than the province average (0.5).
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 29.3% of the land in Aosta, 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
Aosta is not among the radon priority areas designated by the Regione Valle d'Aosta in 2026. According to the ISPRA map, the estimated radon emission in the municipality is 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 3 contaminated sites, or sites still under investigation, in Aosta, and 6 more have been cleaned up or closed. The report tells you whether one is close to the address.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Aosta: 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 Aosta 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 326 inhabited census areas in Aosta. Half of the residents live in areas scoring 76 or more.
Residents by band
- modest 0.0%
- fair 10.6%
- good 62.3%
- very good 27.1%
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
- Seismic classification of municipalities, Dipartimento della Protezione Civile. Licence CC BY 4.0, updated to 2025-05.
- MPS04 seismic hazard model, INGV. Licence CC BY 4.0, 2004 model.
- Data by census section, Istat. Licence CC BY 4.0, residents at the end of 2023, compared with the 2011 census.
- Places, Overture Maps Foundation. Licence CDLA Permissive 2.0 and others depending on provider, release 2026-10-21.0.
- Income and main IRPEF variables by municipality, MEF, Dipartimento delle Finanze. Licence CC BY 3.0 IT, tax year 2024.
- Climate zones and heating degree days of municipalities (Presidential Decree 412/1993, Annex A), Normattiva. Licence CC BY 4.0, current text.
- Land take, territorial dynamics and ecosystem services, ISPRA e SNPA. Licence CC BY 4.0, 2024 data.
- Predictive radon map by municipality, ISPRA. Licence CC BY 4.0, version 2022-11.
- Radon priority areas (Legislative Decree 101/2020), Regione Valle d'Aosta, national list compiled by ARPA Lombardia. Licence Atto pubblico (art. 5 L. 633/1941), 2026.
- Contaminated sites, ISPRA, MOSAICO - Banca dati nazionale dei siti oggetto di procedimento di bonifica. Licence CC BY 4.0, updated to 12 November 2026.
- Liveability index by census area, Vicinalia, from the data in the report sections. Licence CC BY-SA 4.0, worked out on 30 September 2026.
- List of Italian municipalities, Istat. Licence CC BY 4.0, updated to 21 February 2026.
ISTAT code 007003. The text on this page is generated automatically from the data.