Siano: what to know before buying a home
A municipality in the province of Salerno, Campania. Official data on earthquakes, population, services and transport.
Liveability index free for any address
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Search for an address in Siano
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 Zambrano 1, Siano.
Siano, where the Sarno plain meets Pizzo d'Alvano
Siano is where the flat farmland of the Agro nocerino-sarnese runs up against the mountains. The town lies at around 130 metres between Sarno, Castel San Giorgio and Bracigliano, with the slopes of Pizzo d'Alvano rising behind it. It is a place of family homes and small businesses, and many residents commute to Nocera, Salerno or the Naples area. Vegetable plots, hazel groves and fields still surround the built-up area.
For buyers, the first thing to check is where the house sits in relation to the mountain. The slopes of Pizzo d'Alvano are covered with loose volcanic soils lying on limestone and are among the most closely studied in Italy for mudflows. In the upper parts of town and along the channels that come down from the mountain, the report checks the official landslide and flood hazard maps address by address. Lower down, towards the plain, the concern is more about how rainwater drains away during storms.
At the end of 2023 there were 9,382 residents, down 6.9% on 2011, which means 692 fewer people. The average age of 44.4 is slightly lower than in the province of Salerno (45.2), and households are still fairly large, with 2.63 members on average. Foreign residents are few, at 2.4%. Declared incomes are in line with the provincial average.
In the province of Salerno, 18 municipalities are in seismic zone 1, 97 in zone 2 and 43 in zone 3, according to the Civil Protection Department. Siano is in zone 2, with expected ground acceleration in the built-up area of about 0.144 g. For houses built before the 1980s, or extended in stages with extra floors added, ask whether structural work has been done and under which planning permits.
The Revenue Agency (Agenzia delle Entrate) publishes cadastral maps for Siano too. The report traces the land parcel from the address and measures elevation, slope and the distance to local services.
Key points
- At the foot of Pizzo d'Alvano, between Sarno and Castel San Giorgio.
- Landslide and mudflow hazard to check address by address on higher ground.
- 9,382 residents, down 6.9% since 2011.
- Seismic zone 2, expected acceleration about 0.144 g.
Overview
Siano is a municipality in the province of Salerno, in Campania. At the end of 2023 it had 9,382 residents, ranked 27 of 158 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Siano is in seismic zone 2, a zone where strong earthquakes are possible. Most municipalities in the province (97 of 158) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.144 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Siano, 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 6.9%. The estimated average age is 44 years, in line with the province. 22% of residents are over 65 (the regional figure is 21%). Foreign residents make up 2.4% of the population. On average, a household has 2.6 members.
Income and climate
In tax year 2024, taxpayers in Siano declared an average taxable income of 19,788 euros, in line with the province (19,912 euros). The Italian average is 24,895 euros.
Siano is in climate zone C, with 1,298 heating degree days: heating may be switched on from 15 November to 31 March, for up to 10 hours a day. The same table puts the town hall at 126 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Siano has 8 schools and 3 pharmacies. The Overture Maps data also lists 3 grocery shops and supermarkets, 4 healthcare facilities and 7 sports facilities.
There are 0.3 grocery shops and supermarkets 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 16.7% of the land in Siano, compared with 8.0% in the province and 10.6% 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 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 Siano.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Siano: 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 Siano 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 24 inhabited census areas in Siano. Half of the residents live in areas scoring 70 or more.
Residents by band
- modest 0.0%
- fair 2.6%
- good 97.3%
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 065142. The text on this page is generated automatically from the data.