Buying a home in Riano
10,271 residents at the 2021 census, 2,503 buildings and 25.5 km² of territory, Lazio.
Riano is in seismic zone 3 (the region uses the sub-zones 3A): in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 0.5% of the territory of Riano has high or very high landslide hazard (P3 and P4), with 0.1% of the residents. 14.7% of the territory of Riano is in the flood area of the medium-probability scenario (P2), with 0% of the residents.
Find your address in Riano
The preview is free: the parcel, the seismic zone and the types of flags. The full dossier costs €29 including applicable VAT.
Riano compared
| ISPRA indicator | Riano | RM | Lazio |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0% | 2.1% | 4.3% |
| Landslide, high hazard (P3) | 0.5% | 0.6% | 1.2% |
| Landslide, areas of attention | 0% | 6.5% | 8.3% |
| Residents in landslide areas P3-P4 | 0.1% | 0.6% | 1.5% |
| Buildings in landslide areas P3-P4 | 0.1% | 1.2% | 3.2% |
| Flood, high probability (P3) | 14.3% | 3.4% | 2.6% |
| Flood, medium probability (P2) | 14.7% | 4.7% | 3.5% |
| Flood, low probability (P1) | 14.9% | 7% | 5.7% |
| Residents in P2 flood areas | 0% | 3.6% | 3.2% |
| Buildings in P2 flood areas | 0.1% | 4.5% | 3.4% |
Questions
Which seismic zone is Riano in?
Riano is in seismic zone 3 (the region uses the sub-zones 3A): in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Riano is in landslide class P3/P4?
According to ISPRA’s mosaic, 0.5% of the territory of Riano has high or very high landslide hazard (P3 and P4), with 0.1% of the residents. By share of territory with landslide hazard P3-P4, Riano ranks 85th of 121 municipalities in the Metropolitan City of Roma.
How much of Riano is in flood scenario P2?
14.7% of the territory of Riano is in the flood area of the medium-probability scenario (P2), with 0% of the residents. By share of territory in the P2 flood area, Riano ranks 12th of 121 municipalities in the Metropolitan City of Roma.
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 |
|---|---|---|---|
| Castelnuovo di Porto | 3A | 1.4% | 11.4% |
| Capena | 2B | 1.2% | 28.5% |
| Sacrofano | 3A | 0.6% | 0% |
| Morlupo | 3A | 4.9% | 0% |
| Monterotondo | 2B | 0.7% | 21.2% |
| Formello | 3A | 0.4% | 0% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on