Castel Sant'Angelo: what to know before buying a home
A municipality in the province of Rieti, Lazio. Official data on earthquakes, population, services and transport.
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The report looks at the exact point: landslide and flood risk, seismic zone, price per square metre for the area, services and nearby stops.
For example: Via Dante Alighieri 1, Castel Sant'Angelo.
Castel Sant'Angelo, on the Via Salaria between Rieti and Antrodoco
On the Via Salaria, in the Velino valley between Rieti and Antrodoco, Castel Sant'Angelo has its old village on higher ground and part of its territory on the valley floor, where the road runs. Around Cotilia, whose waters were already known in Roman times, there are thermal baths and the small lake of Paterno.
Rieti is the town people rely on for work, secondary schools and the hospital; Rome is reached by following the Salaria south, a journey you need to allow for. In the old centre there are stone houses, often on several floors with narrow access, while along the valley newer homes with gardens are more common.
Earthquakes are the main issue. Castel Sant'Angelo is in seismic zone 1, the highest class in the national classification set by the Civil Protection department, like 12 other municipalities around Rieti, and the expected ground acceleration in the village is 0.231 g. If you are buying a masonry house, ask what structural work has been done, with which designs and certificates, and have a surveyor look at it before signing the preliminary contract. The same goes for floors and rebuilt roofs.
1,186 residents in 2023, 103 fewer than in 2011 (8.0% down, according to Istat, the national statistics office): the village is losing people. The average age of 49.5 is above the provincial 48.1, with over-65s at 29.8%; foreign residents make up 7.2%. Winters are cold, climate zone E.
The Revenue Agency (Agenzia delle Entrate) cadastral maps are published. Near the Velino and the ditches on the valley floor, areas that can flood are shown on the official maps address by address, together with landslides on the slopes.
Key points
- Velino valley, on the Salaria between Rieti and Antrodoco.
- Seismic zone 1, expected acceleration 0.231 g.
- Population down 8.0% since 2011.
- Cotilia thermal baths and Lake Paterno nearby.
Overview
Castel Sant'Angelo is a municipality in the province of Rieti, in Lazio. At the end of 2023 it had 1,186 residents, ranked 28 of 73 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Castel Sant'Angelo is in seismic zone 1, the highest-risk zone, where very strong earthquakes are possible. Only 13 of 73 municipalities in the province are in zone 1.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.231 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Castel Sant'Angelo, the building matters a great deal: ask for the design year, whether it met the 2008 seismic standards, and whether any seismic retrofit has been carried out.
Population
Compared with the 2011 census, the resident population has fallen by 8.0%. The estimated average age is 49 years, in line with the province. 30% of residents are over 65 (the regional figure is 23%). Foreign residents make up 7.2% of the population. On average, a household has 1.9 members.
Income and climate
In tax year 2024, taxpayers in Castel Sant'Angelo declared an average taxable income of 21,437 euros, below the provincial average (22,743 euros). The Italian average is 24,895 euros.
Castel Sant'Angelo is in climate zone E, with 2,487 heating degree days: heating may be switched on from 15 October to 15 April, for up to 14 hours a day. The same table puts the town hall at 581 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Castel Sant'Angelo has 1 school and 1 pharmacy.
The data shows no grocery shops and supermarkets within the municipality, against a provincial average of 0.8 per 1,000 residents.
Public transport
We do not yet have open public transport timetables for this municipality: the report says so explicitly, without inventing distances.
How built-up it is
Buildings, roads, car parks and other sealed surfaces cover 2.1% of the land in Castel Sant'Angelo, compared with 3.2% in the province and 8.2% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
According to the ISPRA map, the estimated radon emission in the municipality is medium. Radon varies from building to building and can only be known by measuring it, especially on ground floors and in basements.
Official databases list no contaminated sites in Castel Sant'Angelo.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Castel Sant'Angelo: the report checks the address against the ISPRA maps.
House prices
The Revenue Agency's price ranges per square metre (OMI) apply to zones, not to whole municipalities: the report gives the range for the address's zone.
Land registry
The cadastral maps for Castel Sant'Angelo are public: from the address the report finds the sheet and parcel number.
Liveability area by area
The Vicinalia liveability index runs from 0 to 100 and looks at the place, not the people who live there: services within walking distance, transport, green space, natural hazards, air, quiet, buildings and connection. Here it is worked out at the centre of each of the 23 inhabited census areas in Castel Sant'Angelo. Half of the residents live in areas scoring 59 or more.
Residents by band
- modest 10.2%
- fair 89.8%
Vicinalia index by census area, licence CC BY-SA 4.0. Data: IdroGEO ISPRA (2026), Istat, INGV, EEA, AGCOM, Overture Maps and OpenStreetMap.
The colour is the value at the centre of the area. For an exact address, search for it above: the free check looks at that exact point. How the index is worked out
Data sources
- Seismic classification of municipalities, Dipartimento della Protezione Civile. Licence CC BY 4.0, updated to 2025-05.
- MPS04 seismic hazard model, INGV. Licence CC BY 4.0, 2004 model.
- Data by census section, Istat. Licence CC BY 4.0, residents at the end of 2023, compared with the 2011 census.
- Places, Overture Maps Foundation. Licence CDLA Permissive 2.0 and others depending on provider, release 2026-10-21.0.
- Income and main IRPEF variables by municipality, MEF, Dipartimento delle Finanze. Licence CC BY 3.0 IT, tax year 2024.
- Climate zones and heating degree days of municipalities (Presidential Decree 412/1993, Annex A), Normattiva. Licence CC BY 4.0, current text.
- Land take, territorial dynamics and ecosystem services, ISPRA e SNPA. Licence CC BY 4.0, 2024 data.
- Predictive radon map by municipality, ISPRA. Licence CC BY 4.0, version 2022-11.
- Contaminated sites, ISPRA, MOSAICO - Banca dati nazionale dei siti oggetto di procedimento di bonifica. Licence CC BY 4.0, updated to 12 November 2026.
- Liveability index by census area, Vicinalia, from the data in the report sections. Licence CC BY-SA 4.0, worked out on 30 September 2026.
- List of Italian municipalities, Istat. Licence CC BY 4.0, updated to 21 February 2026.
ISTAT code 057015. The text on this page is generated automatically from the data.