Buying a home in Piancastagnaio
3,968 residents at the 2021 census, 2,660 buildings and 69.6 km² of territory, Toscana.
Piancastagnaio is in seismic zone 2: in this zone strong earthquakes are possible. According to ISPRA’s mosaic, 15.3% of the territory of Piancastagnaio has high or very high landslide hazard (P3 and P4), with 1% of the residents. 1.6% of the territory of Piancastagnaio is in the flood area of the medium-probability scenario (P2), with 0.2% of the residents.
Find your address in Piancastagnaio
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Piancastagnaio compared
| ISPRA indicator | Piancastagnaio | SI | Toscana |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0.1% | 4.7% | 4.6% |
| Landslide, high hazard (P3) | 15.2% | 14.1% | 16.4% |
| Landslide, areas of attention | 0% | 0% | 0.6% |
| Residents in landslide areas P3-P4 | 1% | 5.2% | 5% |
| Buildings in landslide areas P3-P4 | 1.3% | 5.9% | 8.1% |
| Flood, high probability (P3) | 1.6% | 3.9% | 6.2% |
| Flood, medium probability (P2) | 1.6% | 8.9% | 12.2% |
| Flood, low probability (P1) | 1.7% | 15.8% | 21.2% |
| Residents in P2 flood areas | 0.2% | 5.1% | 25.6% |
| Buildings in P2 flood areas | 0.1% | 4.8% | 22.2% |
Questions
Which seismic zone is Piancastagnaio in?
Piancastagnaio is in seismic zone 2: in this zone strong earthquakes are possible.
How much of Piancastagnaio is in landslide class P3/P4?
According to ISPRA’s mosaic, 15.3% of the territory of Piancastagnaio has high or very high landslide hazard (P3 and P4), with 1% of the residents. By share of territory with landslide hazard P3-P4, Piancastagnaio ranks 16th of 35 municipalities in the province of Siena.
How much of Piancastagnaio is in flood scenario P2?
1.6% of the territory of Piancastagnaio is in the flood area of the medium-probability scenario (P2), with 0.2% of the residents. By share of territory in the P2 flood area, Piancastagnaio ranks 26th of 35 municipalities in the province of Siena.
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 |
|---|---|---|---|
| Abbadia San Salvatore | 2 | 43.6% | 0.9% |
| Castell’Azzara | 2 | 32.2% | 1.1% |
| Santa Fiora | 2 | 44.3% | 0.9% |
| Proceno | 2B | 11.4% | 4.7% |
| Radicofani | 2 | 13.3% | 0.3% |
| San Casciano dei Bagni | 2 | 13.4% | 1.4% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on