Buying a home in Aosta
33,223 residents at the 2021 census, 3,562 buildings and 21.4 km² of territory, Valle d’Aosta/Vallée d’Aoste.
Aosta is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 15.5% of the territory of Aosta has high or very high landslide hazard (P3 and P4), with 1.1% of the residents. 5.6% of the territory of Aosta is in the flood area of the medium-probability scenario (P2), with 1.5% of the residents.
Find your address in Aosta
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Aosta compared
| ISPRA indicator | Aosta | AO | Valle d'Aosta/Vallée d'Aoste |
|---|---|---|---|
| Landslide, very high hazard (P4) | 3.9% | 48.9% | 48.9% |
| Landslide, high hazard (P3) | 11.6% | 34.8% | 34.8% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 1.1% | 10.9% | 10.9% |
| Buildings in landslide areas P3-P4 | 3.1% | 22.6% | 22.6% |
| Flood, high probability (P3) | 4.3% | 5% | 5% |
| Flood, medium probability (P2) | 5.6% | 7.3% | 7.3% |
| Flood, low probability (P1) | 12.4% | 9.2% | 9.2% |
| Residents in P2 flood areas | 1.5% | 9.1% | 9.1% |
| Buildings in P2 flood areas | 2.1% | 11.1% | 11.1% |
Questions
Which seismic zone is Aosta in?
Aosta is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Aosta is in landslide class P3/P4?
According to ISPRA’s mosaic, 15.5% of the territory of Aosta has high or very high landslide hazard (P3 and P4), with 1.1% of the residents. By share of territory with landslide hazard P3-P4, Aosta ranks 74th of 74 municipalities in the province of Valle d’Aosta.
How much of Aosta is in flood scenario P2?
5.6% of the territory of Aosta is in the flood area of the medium-probability scenario (P2), with 1.5% of the residents. By share of territory in the P2 flood area, Aosta ranks 42nd of 74 municipalities in the province of Valle d’Aosta.
Guides: seismic zone · landslides and floods · what to check before an offer. OMI prices: GEOPOI (how to read them).
Nearby municipalities
| Municipality | Seismic zone | Landslide P3-P4 | Flood P2 |
|---|---|---|---|
| Sarre | 3 | 72.4% | 3.1% |
| Saint-Christophe | 3 | 43.8% | 3.2% |
| Gignod | 3 | 54% | 5.8% |
| Roisan | 3 | 44.9% | 3.4% |
| Jovençan | 3 | 49.9% | 6.6% |
| Gressan | 3 | 45.4% | 15% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on