Castronno: what to know before buying a home
A municipality in the province of Varese, Lombardia. Official data on earthquakes, population, services and transport.
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Search for an address in Castronno
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 Lombardia 1, Castronno.
Castronno, between Varese and Gallarate on the line to Milan
Castronno lies halfway between Varese and Gallarate, in a landscape of low hills, woods and closely spaced villages typical of the southern part of the province of Varese. It is mainly residential, with detached houses and small blocks of flats, a compact old core and a few industrial areas along the main roads.
The railway is its strong point. Castronno station is on the line between Gallarate and Varese, and in the open timetables it is served by 2 rail lines, with connections to Varese in one direction and Gallarate and Milan in the other. The motorway to Varese also runs nearby. For every address, the report shows the distance to the station on foot or by car, which weighs on the choice of house for anyone commuting to Milan.
The population is falling: 5,010 residents in 2023, down 4.5% on 2011, according to Istat, the national statistics office. The average age is 47.2 (46.5 in the province of Varese), 25.8% of residents are over 65 and foreign nationals make up 6.1%. Households have 2.30 members on average. Overture Maps, an open map of places, records 2 pharmacies and 5 sports facilities in the municipality.
Earthquakes are not a particular concern. Castronno is in seismic zone 4, like the other 135 municipalities in the province, with an expected ground acceleration of about 0.038 g. In a house from the 1960s or 1970s, look instead at damp in basement rooms, insulation and the state of the heating and electrics.
The Revenue Agency (Agenzia delle Entrate) publishes cadastral maps and the report finds the land parcel from the address. Among hills and small wooded valleys, landslide hazard and flooding along streams change from one street to the next, and the report reads them at the exact point.
Key points
- Station on the Gallarate to Varese line, 2 rail lines.
- 5,010 residents, down 4.5% since 2011.
- Seismic zone 4, expected acceleration about 0.038 g.
- Residential town among low hills and woods.
Overview
Castronno is a municipality in the province of Varese, in Lombardia. At the end of 2023 it had 5,010 residents, ranked 49 of 136 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Castronno is in seismic zone 4, the lowest-risk zone, where strong earthquakes are very rare. All 136 municipalities in the province are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.038 g, a low value: the level with a 10% probability of being exceeded in 50 years, on rock.
In zone 4 the risk is low, but for an older building it is still worth asking about the state of the structure.
Population
Compared with the 2011 census, the resident population has fallen by 4.5%. The estimated average age is 47 years, in line with the province. 26% of residents are over 65 (the regional figure is 24%). Foreign residents make up 6.1% of the population. On average, a household has 2.3 members.
Income and climate
In tax year 2024, taxpayers in Castronno declared an average taxable income of 26,642 euros, in line with the province (27,186 euros). The Italian average is 24,895 euros.
Castronno is in climate zone E, with 2,593 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 325 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Castronno has 3 schools and 2 pharmacies. The Overture Maps data also lists 2 grocery shops and supermarkets, 5 sports facilities and 1 green area.
The data shows no healthcare facilities within the municipality, against a provincial average of 0.7 per 1,000 residents.
Public transport
Within the municipality there are 1 public transport stops, served by 2 train lines, 1 bus line. That is about 0.2 stops per 1,000 residents.
How built-up it is
Buildings, roads, car parks and other sealed surfaces cover 34.6% of the land in Castronno, compared with 21.1% in the province and 12.2% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
Castronno is not among the radon priority areas designated by the Regione Lombardia in 2023. Radon varies from building to building and can only be known by measuring it, especially on ground floors and in basements.
Official databases list one contaminated site, or site still under investigation, in Castronno, 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 Castronno: 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 Castronno 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 17 inhabited census areas in Castronno. Half of the residents live in areas scoring 70 or more.
Residents by band
- fair 18.0%
- good 70.8%
- very good 11.2%
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.
- Public transport timetables (GTFS): Trenord, Regione Lombardia - Trenord, orari ferroviari (GTFS). Licence CC BY 4.0, version 20261111.
- 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 Lombardia, national list compiled by ARPA Lombardia. Licence Atto pubblico (art. 5 L. 633/1941), 2023.
- Contaminated sites, Regione Lombardia. Licence CC0 1.0 (pubblico dominio), updated to 15 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 012047. The text on this page is generated automatically from the data.