Seggiano: what to know before buying a home
A municipality in the province of Grosseto, Toscana. Official data on earthquakes, population, services and transport.
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Search for an address in Seggiano
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: Localita' Pescina 1, Seggiano.
Seggiano, Amiata olive oil and the Spoerri garden
On the northern side of Monte Amiata, at around 490 metres, Seggiano is a village surrounded by olive groves, chestnut woods and forest. The olives produce Seggiano DOP oil, made largely from olivastra seggianese, a variety typical of this area; out in the countryside of the municipality you will also find the Giardino di Daniel Spoerri, an open-air sculpture park created by the artist whose name it bears.
People looking for a home here usually choose between stone houses in the village, with stairs, vaulted ceilings and little light, and farmhouses scattered through the countryside, often with land and an olive grove. For the hospital, secondary schools and larger shops, residents rely on the bigger Amiata towns, while Grosseto and Siena are some way off. The climate zone is E: winter in the hills is cold and a stone house needs proper heating.
The population is holding up: 998 residents in 2023, down 0.6% since 2011. The average age is 49.6, close to the figure for the province of Grosseto (49.1), and over-65s make up 31.0%. Foreign residents account for 22.5%. Declared incomes are below the provincial average.
Seggiano is in seismic zone 3, like 16 of the 28 municipalities in the province, with an expected ground acceleration of 0.140 g. Before buying a farmhouse, have an engineer or surveyor check the walls, the roof and any extensions added over the years, and make sure they all have the right permits.
Using Revenue Agency (Agenzia delle Entrate) maps, the report goes from the address to the plot: for a property with land it is the quickest way to see boundaries, slope and the official landslide maps at that exact spot.
Key points
- Village on the northern side of Monte Amiata, among olives and chestnuts.
- Seggiano DOP olive oil and the Daniel Spoerri garden.
- 998 residents in 2023, foreign residents 22.5%.
- Seismic zone 3, expected acceleration 0.140 g.
Overview
Seggiano is a municipality in the province of Grosseto, in Toscana. At the end of 2023 it had 998 residents, among the smallest in the province (26 of 28).
Earthquakes
For Italy's Civil Protection Department, Seggiano is in seismic zone 3, a zone where strong earthquakes are possible but rare. Most municipalities in the province (16 of 28) are in the same zone.
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.
Even in zone 3, seismic standards apply to new buildings: for an older building, ask about the design year and any structural work.
Population
Compared with the 2011 census, the number of residents is nearly unchanged. The estimated average age is 50 years, in line with the province. 31% of residents are over 65 (the regional figure is 26%). Foreign residents make up 22.5% of the population. On average, a household has 1.8 members.
Income and climate
In tax year 2024, taxpayers in Seggiano declared an average taxable income of 19,277 euros, below the provincial average (22,706 euros). The Italian average is 24,895 euros.
Seggiano is in climate zone E, with 2,204 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 491 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Seggiano has 2 schools and 1 pharmacy. The Overture Maps data also lists 1 sports facility and 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 2.3% of the land in Seggiano, 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
Seggiano 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 no open contaminated sites in Seggiano; one has been cleaned up or closed.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Seggiano: 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 Seggiano 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 27 inhabited census areas in Seggiano. Half of the residents live in areas scoring 66 or more.
Residents by band
- fair 45.3%
- good 54.7%
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 053025. The text on this page is generated automatically from the data.