Buying a home in Roisan
1,005 residents at the 2021 census, 428 buildings and 14.6 km² of territory, Valle d’Aosta/Vallée d’Aoste.
Roisan is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 44.9% of the territory of Roisan has high or very high landslide hazard (P3 and P4), with 8% of the residents. 3.4% of the territory of Roisan is in the flood area of the medium-probability scenario (P2), with 5.8% of the residents.
Find your address in Roisan
The preview is free: the parcel, the seismic zone and the types of flags. The full dossier costs €29 including applicable VAT.
Roisan compared
| ISPRA indicator | Roisan | AO | Valle d'Aosta/Vallée d'Aoste |
|---|---|---|---|
| Landslide, very high hazard (P4) | 7.2% | 48.9% | 48.9% |
| Landslide, high hazard (P3) | 37.8% | 34.8% | 34.8% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 8% | 10.9% | 10.9% |
| Buildings in landslide areas P3-P4 | 9.3% | 22.6% | 22.6% |
| Flood, high probability (P3) | 2.2% | 5% | 5% |
| Flood, medium probability (P2) | 3.4% | 7.3% | 7.3% |
| Flood, low probability (P1) | 4.2% | 9.2% | 9.2% |
| Residents in P2 flood areas | 5.8% | 9.1% | 9.1% |
| Buildings in P2 flood areas | 5.4% | 11.1% | 11.1% |
Questions
Which seismic zone is Roisan in?
Roisan is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Roisan is in landslide class P3/P4?
According to ISPRA’s mosaic, 44.9% of the territory of Roisan has high or very high landslide hazard (P3 and P4), with 8% of the residents. By share of territory with landslide hazard P3-P4, Roisan ranks 70th of 74 municipalities in the province of Valle d’Aosta.
How much of Roisan is in flood scenario P2?
3.4% of the territory of Roisan is in the flood area of the medium-probability scenario (P2), with 5.8% of the residents. By share of territory in the P2 flood area, Roisan ranks 65th 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 |
|---|---|---|---|
| Saint-Christophe | 3 | 43.8% | 3.2% |
| Allein | 3 | 49.5% | 3% |
| Aosta | 3 | 15.5% | 5.6% |
| Doues | 3 | 67.5% | 4.7% |
| Valpelline | 3 | 84.2% | 4.8% |
| Gignod | 3 | 54% | 5.8% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on