Gambassi Terme: what to know before buying a home
A municipality in the province of Firenze, Toscana. Official data on earthquakes, population, services and transport.
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Search for an address in Gambassi Terme
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: Viale della Repubblica 1, Gambassi Terme.
Gambassi Terme, Valdelsa hills and the Via Francigena
On the ridge between the Valdelsa and the Era valley, halfway between Castelfiorentino and Volterra, Gambassi Terme is a hill town surrounded by fields, woods and farmhouses. The name comes from the thermal springs in the area, and in the Middle Ages the village was known for glassmaking. The Via Francigena pilgrim route crosses the municipality, passing the Romanesque parish church of Chianni.
For buyers, Gambassi offers two markets. In the town there are flats and terraced houses in a compact centre. In the countryside around it you find restored farmhouses and small estates, often bought by foreigners or run as holiday farms, with quite different prices and issues: unmade roads, wells, septic tanks and landscape restrictions. San Gimignano and Certaldo are close, Florence is about an hour away, and the handiest station is Castelfiorentino, on the Empoli to Siena line.
The population is almost stable. Istat, the national statistics office, counted 4,851 residents in 2023, down 1.0% since 2011. The average age is 47.4, in line with the province, and 26.1% are over 65. Foreign residents make up 6.7%. Declared incomes are below the Florence area average. Very little land has been built on, so the farming landscape is still intact.
Gambassi is in seismic zone 3 under the Civil Protection Department classification, like 27 other municipalities in the metropolitan area, with expected ground acceleration of about 0.141 g. For stone farmhouses, often extended over the years, ask for the walls to be checked, along with the joints between parts built at different times.
The clay hills of the Valdelsa are prone to landslides and slips. The report checks slope and mapped hazard areas at the exact address. Revenue Agency cadastral maps are available.
Key points
- Ridge between Valdelsa and Valdera, on the Via Francigena.
- 4,851 residents, down 1.0% since 2011.
- Seismic zone 3, expected acceleration about 0.141 g.
- Country farmhouses: weigh up landslides and unmade roads.
Overview
Gambassi Terme is a municipality in the province of Firenze, in Toscana. At the end of 2023 it had 4,851 residents, ranked 35 of 41 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Gambassi Terme is in seismic zone 3, a zone where strong earthquakes are possible but rare. Most municipalities in the province (28 of 41) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.141 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 resident population has fallen by 1.0%. The estimated average age is 47 years, in line with the province. 26% of residents are over 65 (the regional figure is 26%). Foreign residents make up 6.7% of the population. On average, a household has 2.3 members.
Income and climate
In tax year 2024, taxpayers in Gambassi Terme declared an average taxable income of 22,902 euros, below the provincial average (27,023 euros). The Italian average is 24,895 euros.
Gambassi Terme is in climate zone E, with 2,273 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 332 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Gambassi Terme has 3 schools and 1 pharmacy. The Overture Maps data also lists 1 grocery shop, 1 healthcare facility, 2 sports facilities and 2 parks and green areas.
There are 0.2 healthcare facilities per 1,000 residents, fewer than the province average (0.8).
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 4.0% of the land in Gambassi Terme, compared with 7.4% in the province and 6.2% in the region. In 2024 built-up land grew by 4.4 hectares.
Radon and contaminated sites
Gambassi Terme 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 Gambassi Terme, and one more has been cleaned up or closed. 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 Gambassi Terme: 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 Gambassi Terme 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 42 inhabited census areas in Gambassi Terme. Half of the residents live in areas scoring 61 or more.
Residents by band
- fair 61.1%
- good 38.9%
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 048020. The text on this page is generated automatically from the data.