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San Didero: what to know before buying a home

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

Liveability index free for any address

Search for an address in San Didero

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 Augusto Abegg 2, San Didero.

San Didero, the lower Susa valley beneath the mountains

San Didero lies in the lower Susa valley, between the floor of the Dora Riparia valley and the first mountain slopes, with the town hall at around 430 metres. It is a small valley municipality: the motorway and railway to France run along the valley floor, and for services and work people look to the larger towns in the valley and the Turin area.

In 2023 there were 503 residents, 11.1% fewer than in 2011, according to Istat, the national statistics office. The mean age is 50.3, against 47.4 in the metropolitan city of Turin; over-65s make up 30.6% and foreign residents 2.2%. Households have 2.16 members on average. Declared incomes are below the provincial average.

In a valley municipality like this one, the exact position of the house deserves close attention. Lower down, noise from the main transport routes and closeness to the Dora matter; on the slopes, gradient, access and hours of winter sun. The climate zone is E.

Earthquakes in the Susa valley should not be ignored: San Didero is in seismic zone 3, like 271 of the 312 municipalities in the Turin area, with an expected ground acceleration in the built-up area of about 0.132 g. For a masonry building, have an engineer check how the walls are tied to the floors.

The Revenue Agency's cadastral maps are published, and the report traces the address to the land parcel. Flooding near the Dora and debris flows from the side streams are read on the official maps for the exact spot, which is what the report checks.

Key points

  • Lower Susa valley, between the Dora Riparia and the first slopes.
  • 503 residents in 2023, down 11.1% since 2011.
  • Seismic zone 3, expected acceleration about 0.132 g.
  • Exact position matters: valley floor, river or slope.

Overview

San Didero is a municipality in the province of Torino, in Piemonte. At the end of 2023 it had 503 residents, ranked 255 of 312 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, San Didero is in seismic zone 3, a zone where strong earthquakes are possible but rare. The region uses a finer breakdown: here the classification is 3S. Most municipalities in the province (271 of 312) are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.132 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 11.1%. The estimated average age is 50 years, higher than the province average (47). 31% of residents are over 65 (the regional figure is 27%). Foreign residents make up 2.2% of the population. On average, a household has 2.2 members.

Income and climate

In tax year 2024, taxpayers in San Didero declared an average taxable income of 24,365 euros, below the provincial average (27,231 euros). The Italian average is 24,895 euros.

San Didero is in climate zone E, with 2,999 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 430 metres above sea level.

Public transport

We do not yet have open public transport timetables for this municipality: the report says so explicitly, without inventing distances.

How built-up it is

Buildings, roads, car parks and other sealed surfaces cover 11.3% of the land in San Didero, compared with 8.6% in the province and 6.7% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

San Didero is not among the radon priority areas designated by the Regione Piemonte 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 San Didero.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within San Didero: 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 San Didero 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 7 inhabited census areas in San Didero. Half of the residents live in areas scoring 64 or more.

Residents by band

  • fair 100.0%

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 001239. The text on this page is generated automatically from the data.