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Castelmarte: what to know before buying a home

A municipality in the province of Como, Lombardia. Official data on earthquakes, population, services and transport.

Liveability index free for any address

Search for an address in Castelmarte

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 Valleggio 1, Castelmarte.

Castelmarte, on the Asso railway north of Erba

North of Erba, in the Como part of Brianza, lies the small municipality of Castelmarte, where the Lambro valley starts to rise towards the Triangolo Lariano, the hilly area between the two southern arms of Lake Como. Its territory is small and largely built up, with detached houses, villas and a few low-rise blocks around the old core.

The connection that matters is the train. Castelmarte has 1 station on the Trenord line that runs from Asso down to Erba and on to Milan, served by 1 railway line, plus 1 bus line. For anyone working in Milan or Brianza, this makes the village an alternative to the bigger towns without relying on the car all the time. Erba, with shops and services, is a few minutes away.

In 2023 there were 1,259 residents, down 2.1% since 2011 according to Istat, the national statistics office, so practically unchanged. The average age is 46.9 (46.3 in the province), over-65s are 24.1%, exactly as in the province of Como, and foreign residents 3.6%. Households have 2.36 members on average. Declared incomes are slightly below the provincial average.

All 147 municipalities in the province of Como are in seismic zone 4, the lowest class in the Civil Protection classification, and here the expected acceleration is 0.046 g. For a house from the 1960s or 1970s, insulation, systems and the roof matter more.

The Revenue Agency (Agenzia delle Entrate) publishes the cadastral maps, and the report goes from the address to the plot. Near the Lambro and on the slopes down to the river, check the official flood and landslide maps.

Key points

  • Como Brianza, north of Erba, in the Lambro valley.
  • 1 Trenord station on the line to Erba and Milan.
  • All 147 municipalities in the province in seismic zone 4.
  • Over-65s at 24.1%, foreign residents at 3.6%.

Overview

Castelmarte is a municipality in the province of Como, in Lombardia. At the end of 2023 it had 1,259 residents, ranked 96 of 147 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Castelmarte is in seismic zone 4, the lowest-risk zone, where strong earthquakes are very rare. All 147 municipalities in the province are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.046 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 2.1%. The estimated average age is 47 years, in line with the province. 24% of residents are over 65 (the regional figure is 24%). Foreign residents make up 3.6% of the population. On average, a household has 2.4 members.

Income and climate

In tax year 2024, taxpayers in Castelmarte declared an average taxable income of 25,949 euros, in line with the province (26,761 euros). The Italian average is 24,895 euros.

Castelmarte is in climate zone E, with 2,882 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 459 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Castelmarte has 2 schools and 1 pharmacy. The Overture Maps data also lists 1 grocery shop.

The data shows no healthcare facilities within the municipality, against a provincial average of 0.6 per 1,000 residents.

Public transport

Within the municipality there are 1 public transport stops, served by 1 bus line, 1 train line. That is about 0.8 stops per 1,000 residents.

How built-up it is

Buildings, roads, car parks and other sealed surfaces cover 26.6% of the land in Castelmarte, compared with 12.3% in the province and 12.2% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Castelmarte 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 no open contaminated sites in Castelmarte; 2 have been cleaned up or closed.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Castelmarte: 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 Castelmarte 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 11 inhabited census areas in Castelmarte. Half of the residents live in areas scoring 72 or more.

Residents by band

  • fair 21.7%
  • good 78.2%
  • very good 0.1%

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

ISTAT code 013058. The text on this page is generated automatically from the data.