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Trezzo sull'Adda: what to know before buying a home

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

Liveability index free for any address

Search for an address in Trezzo sull'Adda

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 Francesco Guarnerio 1, Trezzo sull'Adda.

Trezzo sull'Adda, castle and power station on a river bend

Here the river Adda makes a tight bend and marks the boundary between the Milan metropolitan area and the province of Bergamo. Trezzo is built on a high terrace above the river. On the headland inside the bend stand the remains of the Visconti castle and its tower, and below, at water level, is the Taccani hydroelectric power station, built in the early twentieth century and still working. Footpaths and the cycle route of the Parco Adda Nord follow the bank.

The A4 motorway junction puts Milan and Bergamo within easy reach, traffic permitting. There is no railway, and the open timetable data show no stops in the municipality, so if you do not drive, ask locally about bus services. Buyers will find the old centre near the river, with older houses and courtyards, residential districts from the 1960s and 1970s, and newer areas towards the motorway.

Istat, the national statistics office, counted 12,107 residents in 2023, up 1.9% on 2011. Trezzo is a little older than the metropolitan average (estimated average age 46.8 against 45.6) and foreign residents make up 14.3%. For a town of this size there are many supermarkets, 11, and green spaces and sports facilities per resident are also above the provincial average.

Earthquake hazard is low. Trezzo is in seismic zone 3, like 59 other municipalities around Milan, and the expected ground acceleration is about 0.089 g. In a 1960s flat, insulation, the heating and wiring, and the service charges of the building count for more.

The cadastral maps are available and the report finds the plot from the address. Along the steep banks down to the Adda, slope and ground stability matter; on the riverside, flooding does. Both are checked for the individual address.

Key points

  • On a bend of the Adda, with the Visconti castle and Taccani power station.
  • A4 motorway junction for Milan and Bergamo, no railway.
  • Population up 1.9% since 2011; foreign residents 14.3%.
  • Seismic zone 3, expected acceleration about 0.089 g.

Overview

Trezzo sull'Adda is a municipality in the province of Milano, in Lombardia. At the end of 2023 it had 12,107 residents, ranked 54 of 133 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Trezzo sull'Adda is in seismic zone 3, a zone where strong earthquakes are possible but rare. Only 60 of 133 municipalities in the province are in zone 3.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.089 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

Even in zone 3, seismic standards apply to new buildings: for an older building, ask about the design year and any structural work.

Population

Compared with the 2011 census, the resident population has grown by 1.9%. The estimated average age is 47 years, in line with the province. 25% of residents are over 65 (the regional figure is 24%). Foreign residents make up 14.3% of the population. On average, a household has 2.2 members.

Income and climate

In tax year 2024, taxpayers in Trezzo sull'Adda declared an average taxable income of 26,972 euros, below the provincial average (33,635 euros). The Italian average is 24,895 euros.

Trezzo sull'Adda is in climate zone E, with 2,428 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 187 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Trezzo sull'Adda has 8 schools and 3 pharmacies. The Overture Maps data also lists 11 grocery shops and supermarkets, 5 healthcare facilities, 14 sports facilities and 6 parks and green areas.

There are 0.9 grocery shops and supermarkets per 1,000 residents, more than the province average (0.3).

Public transport

The open timetables available for the area do not list any stops within the territory of Trezzo sull'Adda.

How built-up it is

Buildings, roads, car parks and other sealed surfaces cover 26.7% of the land in Trezzo sull'Adda, compared with 32.0% in the province and 12.2% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Trezzo sull'Adda 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 Trezzo sull'Adda, and 5 more have 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 Trezzo sull'Adda: 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 Trezzo sull'Adda 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 36 inhabited census areas in Trezzo sull'Adda. Half of the residents live in areas scoring 67 or more.

Residents by band

  • modest 0.4%
  • fair 40.1%
  • good 59.6%

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 015221. The text on this page is generated automatically from the data.