San Giovanni Gemini: what to know before buying a home
A municipality in the province of Agrigento, Sicilia. Official data on earthquakes, population, services and transport.
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Search for an address in San Giovanni Gemini
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: Corso Umberto Primo 1, San Giovanni Gemini.
San Giovanni Gemini, on Monte Cammarata beside Cammarata
San Giovanni Gemini and Cammarata are two separate municipalities that form a single built-up area, spread across the slope of Monte Cammarata, the highest peak of the Sicani mountains in inland Sicily. The boundary runs between one street and the next, and newcomers find it hard to tell where one town ends and the other begins. San Giovanni Gemini stands at around seven hundred metres, inland in the province of Agrigento, between Agrigento and Palermo, with the Platani valley below and woods and pastures towards the summit.
The altitude makes a big difference compared with coastal towns. Winters are cold (climate zone D), with the occasional snowfall, and summers cooler than the Sicilian average; heating is a real cost. The market offers stone houses in the centre, often on several floors and on steep streets, and newer blocks in the outer districts. For work, many people travel to Agrigento, Palermo or the towns in the valley, always by car.
At the end of 2023 there were 7,480 residents, against 8,127 in 2011, down 8.0% according to Istat, the national statistics office. The average age is 46.4, just above 45.6 for the province, over-65s make up 25.4% and foreign residents just 1.8%. For its size the town still has plenty of places to eat and drink: 5.48 bars and restaurants per 1,000 residents against 4.63 in the province.
San Giovanni Gemini is in seismic zone 2 on the scale of the Civil Protection Department (Protezione Civile), like 26 other municipalities around Agrigento, though the expected ground acceleration in the built-up area, about 0.075 g, is low. For masonry houses built on the slope, often raised or extended over time, it is still wise to have the structure checked before buying.
With the gradients of the mountain and the clay soils of the valley, landslides are the thing to check. The report does so for the address, also using the cadastral maps of the Revenue Agency (Agenzia delle Entrate), which are published for the municipality.
Key points
- One built-up area with Cammarata, on the slope of the Sicani peak.
- Almost seven hundred metres up: cold winters, climate zone D.
- Residents down 8.0% since 2011.
- Seismic zone 2, expected acceleration 0.075 g.
Overview
San Giovanni Gemini is a municipality in the province of Agrigento, in Sicilia. At the end of 2023 it had 7,480 residents, ranked 15 of 43 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, San Giovanni Gemini is in seismic zone 2, a zone where strong earthquakes are possible. Most municipalities in the province (27 of 43) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.075 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in San Giovanni Gemini, 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 46 years, in line with the province. 25% of residents are over 65 (the regional figure is 23%). Foreign residents make up 1.8% of the population. On average, a household has 2.4 members.
Income and climate
In tax year 2024, taxpayers in San Giovanni Gemini declared an average taxable income of 18,257 euros, in line with the province (18,027 euros). The Italian average is 24,895 euros.
San Giovanni Gemini is in climate zone D, with 1,588 heating degree days: heating may be switched on from 1 November to 15 April, for up to 12 hours a day. The same table puts the town hall at 670 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, San Giovanni Gemini has 5 schools and 2 pharmacies. The Overture Maps data also lists 6 grocery shops and supermarkets, 4 healthcare facilities, 2 sports facilities and 1 green area.
There are 0.7 schools per 1,000 residents, fewer than the province average (1.0).
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 8.8% of the land in San Giovanni Gemini, compared with 5.8% in the province and 6.6% 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 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 contaminated sites in San Giovanni Gemini.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within San Giovanni Gemini: 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 San Giovanni Gemini 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 31 inhabited census areas in San Giovanni Gemini. Half of the residents live in areas scoring 81 or more.
Residents by band
- modest 0.1%
- fair 5.7%
- good 37.2%
- very good 57.0%
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 084036. The text on this page is generated automatically from the data.