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Grosio: what to know before buying a home

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

Liveability index free for any address

Search for an address in Grosio

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 Roma 1, Grosio.

Grosio, castles and rock carvings along the Adda

Heading up the Valtellina from Tirano towards Bormio, Grosio is the village you reach where the valley narrows. Above the houses, on the castle hill, is the rock art park with the Rupe Magna, a huge rock covered in prehistoric engravings. The valley floor is shaped by the river Adda and by hydroelectric works, which have long played a big part in this stretch of the valley.

The village has a compact centre of stone houses, some with carved doorways and frescoes, and newer areas towards the valley floor. Higher up, on the slopes, are summer pastures and mountain huts. The climate is alpine, zone F, the coldest in the Italian heating classification, and the town hall stands at around six hundred and fifty metres, so insulation, windows and heating weigh heavily on running costs. For houses near the Adda or on the fans of mountain streams, the report checks the official flood and landslide maps.

Istat, the national statistics office, counts 4,294 residents in 2023, down 7.0% on 2011. The average age is 47.8, above the province of Sondrio (46.8), and over-65s make up 27.8%. Foreign residents are few, at 2.4%. Declared incomes are below the provincial average.

For earthquakes the province is split between zone 3 (64 municipalities) and zone 4 (13); Grosio is in zone 3, with an expected ground acceleration of around 0.084 g. In a stone house in the centre, look at the roof, the timber floors and damp in walls set against the hillside.

Key points

  • Between Tirano and Bormio, home of the Rupe Magna rock art park.
  • Climate zone F, town hall at about six hundred and fifty metres.
  • 4,294 residents, over-65s at 27.8%.
  • Seismic zone 3, expected acceleration about 0.084 g.

Overview

Grosio is a municipality in the province of Sondrio, in Lombardia. At the end of 2023 it had 4,294 residents, ranked 9 of 77 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Grosio is in seismic zone 3, a zone where strong earthquakes are possible but rare. Most municipalities in the province (64 of 77) are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.084 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 fallen by 7.0%. The estimated average age is 48 years, in line with the province. 28% of residents are over 65 (the regional figure is 24%). Foreign residents make up 2.4% of the population. On average, a household has 2.3 members.

Income and climate

In tax year 2024, taxpayers in Grosio declared an average taxable income of 21,851 euros, below the provincial average (23,822 euros). The Italian average is 24,895 euros.

Grosio is in climate zone F, with 3,001 heating degree days, with no limits on when heating may be used. The same table puts the town hall at 656 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Grosio has 3 schools and 1 pharmacy. The Overture Maps data also lists 2 grocery shops and supermarkets, 1 sports facility and 1 green area.

The data shows no healthcare facilities within the municipality, against a provincial average of 0.5 per 1,000 residents.

Public transport

The open timetables available for the area do not list any stops within the territory of Grosio.

How built-up it is

Buildings, roads, car parks and other sealed surfaces cover 1.6% of the land in Grosio, compared with 2.7% in the province and 12.2% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Grosio is one of the municipalities designated as a radon priority area by the Regione Lombardia in 2023. According to the ISPRA map, the estimated radon emission in the municipality is medium. 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 Grosio; one has been cleaned up or closed.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Grosio: 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 Grosio 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 23 inhabited census areas in Grosio. Half of the residents live in areas scoring 63 or more.

Residents by band

  • modest 0.0%
  • fair 66.3%
  • good 33.6%

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 014033. The text on this page is generated automatically from the data.