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Brenna: 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 Brenna

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 Olgelasca 1, Brenna.

Brenna, Brianza hills near Como with a railway station

Brenna is a municipality in the Como part of Brianza, set among low hills, woods and meadows between Como, Cantù and the Milan side of Brianza. It is a residential village of scattered houses, small historic hamlets and craft businesses, where many residents work in nearby towns or around Milan.

The municipality has a railway station: the data list 1 stop and 1 train line, a convenience not every Brianza village enjoys. Otherwise people drive, on provincial roads that are often busy at rush hour. Homes are mostly detached and semi-detached houses and small blocks, with a few restored farm courtyards.

The population is growing: Istat, the national statistics office, records 2,203 residents in 2023, up 9.5% on 2011. The average age is 45.6, just under 46.3 for the province of Como, and over-65s make up 24.6%. Foreign nationals account for 2.0%. Declared incomes are in line with the Como average.

Earthquake risk is low: all 147 municipalities in the province are in seismic zone 4, with expected ground acceleration of 0.046 g. In a 1980s detached house the most useful checks are insulation, windows and the boiler, given the cold winters of climate zone E.

The Revenue Agency (Agenzia delle Entrate) publishes cadastral maps: the report identifies the land parcel from the address and checks the official flood and landslide maps, as well as the real distance to the station.

Key points

  • Residential hills in the Como part of Brianza.
  • Railway station: 1 stop in the data.
  • Population up 9.5% since 2011.
  • Seismic zone 4, like the whole province of Como.

Overview

Brenna is a municipality in the province of Como, in Lombardia. At the end of 2023 it had 2,203 residents, ranked 79 of 147 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Brenna 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 grown by 9.5%. The estimated average age is 46 years, in line with the province. 25% of residents are over 65 (the regional figure is 24%). Foreign residents make up 2.0% of the population. On average, a household has 2.4 members.

Income and climate

In tax year 2024, taxpayers in Brenna declared an average taxable income of 26,979 euros, in line with the province (26,761 euros). The Italian average is 24,895 euros.

Brenna is in climate zone E, with 2,575 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 356 metres above sea level.

Services

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

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 train line. That is about 0.5 stops per 1,000 residents.

How built-up it is

Buildings, roads, car parks and other sealed surfaces cover 12.5% of the land in Brenna, 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

Brenna 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 contaminated sites in Brenna.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Brenna: 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 Brenna 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 12 inhabited census areas in Brenna. Half of the residents live in areas scoring 77 or more.

Residents by band

  • fair 26.9%
  • good 72.2%
  • very good 1.0%

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

ISTAT code 013029. The text on this page is generated automatically from the data.