Buying a home in Saint-Denis
371 residents at the 2021 census, 448 buildings and 11.4 km² of territory, Valle d’Aosta/Vallée d’Aoste.
Saint-Denis is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 38.4% of the territory of Saint-Denis has high or very high landslide hazard (P3 and P4), with 37.5% of the residents. 2.3% of the territory of Saint-Denis is in the flood area of the medium-probability scenario (P2), with 1.8% of the residents.
Find your address in Saint-Denis
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Saint-Denis compared
| ISPRA indicator | Saint-Denis | AO | Valle d'Aosta/Vallée d'Aoste |
|---|---|---|---|
| Landslide, very high hazard (P4) | 14.6% | 48.9% | 48.9% |
| Landslide, high hazard (P3) | 23.8% | 34.8% | 34.8% |
| Landslide, areas of attention | 0% | 0% | 0% |
| Residents in landslide areas P3-P4 | 37.5% | 10.9% | 10.9% |
| Buildings in landslide areas P3-P4 | 29.7% | 22.6% | 22.6% |
| Flood, high probability (P3) | 1.4% | 5% | 5% |
| Flood, medium probability (P2) | 2.3% | 7.3% | 7.3% |
| Flood, low probability (P1) | 3.7% | 9.2% | 9.2% |
| Residents in P2 flood areas | 1.8% | 9.1% | 9.1% |
| Buildings in P2 flood areas | 1.9% | 11.1% | 11.1% |
Questions
Which seismic zone is Saint-Denis in?
Saint-Denis is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Saint-Denis is in landslide class P3/P4?
According to ISPRA’s mosaic, 38.4% of the territory of Saint-Denis has high or very high landslide hazard (P3 and P4), with 37.5% of the residents. By share of territory with landslide hazard P3-P4, Saint-Denis ranks 72nd of 74 municipalities in the province of Valle d’Aosta.
How much of Saint-Denis is in flood scenario P2?
2.3% of the territory of Saint-Denis is in the flood area of the medium-probability scenario (P2), with 1.8% of the residents. By share of territory in the P2 flood area, Saint-Denis ranks 72nd 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 |
|---|---|---|---|
| Verrayes | 3 | 52.9% | 3% |
| Châtillon | 3 | 81.8% | 4.8% |
| Antey-Saint-André | 3 | 63% | 14% |
| Pontey | 3 | 70.4% | 9.7% |
| Chambave | 3 | 86.7% | 10.6% |
| Torgnon | 3 | 71.6% | 5% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on