Castell'Azzara: what to know before buying a home
A municipality in the province of Grosseto, Toscana. Official data on earthquakes, population, services and transport.
Liveability index free for any address
Land sheet 6 free checks
Search for an address in Castell'Azzara
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 Aldo Aldobrandeschi 1, Castell'Azzara.
Castell'Azzara, the Grosseto side of Amiata and Monte Penna
Castell'Azzara is a mountain village on the south-eastern slope of Monte Amiata, above eight hundred metres, in the eastern corner of the province of Grosseto. Most of the land is wooded, and it includes the Monte Penna nature reserve. Grosseto is more than an hour away by road, and for many services people look to the towns around Amiata.
The figures are those of an ageing mountain village: 1,292 residents in 2023, 19.3% fewer than in 2011, an average age of 55.0 against 49.1 in the province, and over-65s at 41.2% compared with 29.0% provincially. Foreign residents are 12.3%. Declared incomes are below the provincial average.
On earthquakes, Castell'Azzara is an exception in the province: it is one of only 2 municipalities around Grosseto in seismic zone 2 of the Civil Protection classification, while the rest are in zone 3 or 4. The expected ground acceleration is 0.140 g. For a stone house in the centre, ask whether work has been done on walls, floors and roof, and what paperwork exists.
The market is made up of stone village houses, often on several floors, and the odd isolated house near the woods. It is climate zone E, with cold winters and snow: a summer house and a home for all year round have very different heating and insulation needs. If you can, see the property in winter too.
Revenue Agency (Agenzia delle Entrate) cadastral maps cover the municipality. From the address, the report finds the land parcel, checks the official landslide maps and measures the distance to the pharmacy, school and shops.
Key points
- South-eastern slope of Monte Amiata, above eight hundred metres.
- One of only 2 municipalities in the province in seismic zone 2.
- Over-65s at 41.2%, against 29.0% in the province.
- Cold winters: try to see the house in the cold season too.
Overview
Castell'Azzara is a municipality in the province of Grosseto, in Toscana. At the end of 2023 it had 1,292 residents, ranked 23 of 28 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Castell'Azzara is in seismic zone 2, a zone where strong earthquakes are possible. Only 2 of 28 municipalities in the province are in zone 2.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.140 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Castell'Azzara, 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 19.3%. The estimated average age is 55 years, higher than the province average (49). 41% of residents are over 65 (the regional figure is 26%). Foreign residents make up 12.3% of the population. On average, a household has 1.8 members.
Income and climate
In tax year 2024, taxpayers in Castell'Azzara declared an average taxable income of 19,145 euros, below the provincial average (22,706 euros). The Italian average is 24,895 euros.
Castell'Azzara is in climate zone E, with 2,689 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 815 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Castell'Azzara has 3 schools and 2 pharmacies. The Overture Maps data also lists 1 green area.
The data shows no grocery shops and supermarkets within the municipality, against a provincial average of 0.7 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 Castell'Azzara, compared with 3.2% in the province and 6.2% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
Castell'Azzara is not among the radon priority areas designated by the Regione Toscana in 2025. According to the ISPRA map, the estimated radon emission in the municipality is low. Radon varies from building to building and can only be known by measuring it, especially on ground floors and in basements.
Official databases list 2 contaminated sites, or sites still under investigation, in Castell'Azzara. The report tells you whether one is close to the address.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Castell'Azzara: 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 Castell'Azzara 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 20 inhabited census areas in Castell'Azzara. Half of the residents live in areas scoring 73 or more.
Residents by band
- fair 37.8%
- good 62.2%
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.
- Radon priority areas (Legislative Decree 101/2020), Regione Toscana, national list compiled by ARPA Lombardia. Licence Atto pubblico (art. 5 L. 633/1941), 2025.
- 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 053005. The text on this page is generated automatically from the data.