Trezzano Rosa: 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
Land sheet 6 free checks
Search for an address in Trezzano Rosa
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 Aldo Moro 1, Trezzano Rosa.
Trezzano Rosa, between the Martesana and the Adda
Not to be confused with Trezzano sul Naviglio, on the opposite side of Milan to the south-west, Trezzano Rosa is a small municipality on the plain east of the city, in the Martesana area near Trezzo sull'Adda and Pozzo d'Adda. When house hunting, take care not to mix up listings and prices for the two, which share little beyond the name.
The village has grown with streets of detached houses, terraces and small blocks of flats around its old farming centre. Much of the municipal area is now built up. Most people drive to Milan: the Trezzo junction on the A4 motorway is close, and the green line of the Milan metro ends at Gessate, a few kilometres away.
There were 5,383 residents in 2023, according to Istat, the national statistics office, up 10.7% on 2011. The average age is 44.0, against 45.6 for the Milan metropolitan area, and over-65s make up 19.2%, against 23.0%. Households average 2.33 people and foreign residents account for 9.5%. Declared incomes are below the provincial average, although that figure is pushed up by Milan itself.
Trezzano Rosa is in seismic zone 3 of the classification by the Protezione Civile, Italy's Civil Protection Department, like 60 municipalities around Milan, while the other 73 are in zone 4. The expected ground acceleration in the built-up area is low, about 0.085 g. In newer houses, look mainly at the energy rating and build quality; in the converted farm buildings of the centre, at the condition of roofs and walls.
The Revenue Agency (Agenzia delle Entrate) cadastral maps are available, so the report goes from the address to the plot, measuring distances to schools, shops and stops from the house itself rather than from the town hall.
Key points
- Martesana area, near Trezzo sull'Adda; not Trezzano sul Naviglio.
- Population up 10.7% since 2011.
- Over-65s at 19.2%, against 23.0% in the province.
- Seismic zone 3, low acceleration of about 0.085 g.
Overview
Trezzano Rosa is a municipality in the province of Milano, in Lombardia. At the end of 2023 it had 5,383 residents, ranked 98 of 133 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Trezzano Rosa 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 0.085 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 10.7%. The estimated average age is 44 years, lower than the province average (46). 19% of residents are over 65 (the regional figure is 24%). Foreign residents make up 9.5% of the population. On average, a household has 2.3 members.
Income and climate
In tax year 2024, taxpayers in Trezzano Rosa declared an average taxable income of 27,822 euros, below the provincial average (33,635 euros). The Italian average is 24,895 euros.
Trezzano Rosa is in climate zone E, with 2,471 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 170 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Trezzano Rosa has 3 schools and 1 pharmacy. The Overture Maps data also lists 2 grocery shops and supermarkets, 2 healthcare facilities and 4 sports facilities.
There are 0.4 healthcare facilities per 1,000 residents, fewer than the province average (0.8).
Public transport
The open timetables available for the area do not list any stops within the territory of Trezzano Rosa.
How built-up it is
Buildings, roads, car parks and other sealed surfaces cover 40.3% of the land in Trezzano Rosa, compared with 32.0% in the province and 12.2% in the region. In 2024 built-up land grew by 0.5 hectares.
Radon and contaminated sites
Trezzano Rosa 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 Trezzano Rosa. 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 Trezzano Rosa: 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 Trezzano Rosa 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 15 inhabited census areas in Trezzano Rosa. Half of the residents live in areas scoring 66 or more.
Residents by band
- modest 0.0%
- fair 20.9%
- good 79.1%
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
- 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): ATM Milano, Comune di Milano - AMAT, orari del trasporto pubblico ATM (GTFS). Licence CC BY 4.0, version 20261029.
- 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 015219. The text on this page is generated automatically from the data.