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Piansano: what to know before buying a home

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

Liveability index free for any address

Search for an address in Piansano

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 Tuscania 1, Piansano.

Piansano, the Tuscia plateau west of Lake Bolsena

Piansano stands on a plateau in the Tuscia, the northern part of the province of Viterbo, a short distance from the western shore of Lake Bolsena. The soil is volcanic and intensively farmed, with cereal fields, olive groves and vineyards. Viterbo, the provincial capital, is the reference for hospital care, offices and secondary schools.

The village is compact, with terraced houses and small apartment blocks in the centre and rural homes in the countryside. If you buy outside the built-up area, weigh up access, utility connections and the distance to services, which can be considerable. The climate zone is E: on an inland plateau, winters are colder than most people expect in Lazio, and insulation and heating make a real difference to running costs.

According to Istat, Italy's national statistics office, there were 1,998 residents at the end of 2023, down 6.9% on 2011. The average age is 50.2, against 47.5 for the province, and 30.9% of residents are over 65, above the provincial 25.9%. Foreign residents make up 10.4%. Declared incomes are below the provincial average.

The seismic zone is 2, as for 39 other municipalities in the province of Viterbo, with an expected ground acceleration in the built-up area of 0.140 g. For a tuff or stone masonry house, ask whether the floors and roof have been worked on and whether that work is documented.

The Revenue Agency (Agenzia delle Entrate) publishes the cadastral maps, and the report goes from the address to the land parcel, with landslide and flood maps for that spot.

Key points

  • Farming village on a Tuscia plateau, near Lake Bolsena.
  • Climate zone E: winters colder than you might expect.
  • Population down 6.9% since 2011.
  • Seismic zone 2, expected acceleration 0.140 g.

Overview

Piansano is a municipality in the province of Viterbo, in Lazio. At the end of 2023 it had 1,998 residents, ranked 40 of 60 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Piansano is in seismic zone 2, a zone where strong earthquakes are possible. The region uses a finer breakdown: here the classification is 2B. Most municipalities in the province (40 of 60) are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.140 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

For anyone buying in Piansano, the building matters a great deal: ask for the design year, whether it met the 2008 seismic standards, and whether any seismic retrofit has been carried out.

Population

Compared with the 2011 census, the resident population has fallen by 6.9%. The estimated average age is 50 years, higher than the province average (48). 31% of residents are over 65 (the regional figure is 23%). Foreign residents make up 10.4% of the population. On average, a household has 2.2 members.

Income and climate

In tax year 2024, taxpayers in Piansano declared an average taxable income of 19,004 euros, below the provincial average (22,031 euros). The Italian average is 24,895 euros.

Piansano is in climate zone E, with 2,146 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 409 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Piansano has 3 schools and 1 pharmacy. The Overture Maps data also lists 1 grocery shop and 1 healthcare facility.

There are 1.5 schools per 1,000 residents, more than the province average (0.9).

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 3.4% of the land in Piansano, compared with 4.7% in the province and 8.2% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Official databases list no contaminated sites in Piansano.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Piansano: 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 Piansano 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 19 inhabited census areas in Piansano. Half of the residents live in areas scoring 60 or more.

Residents by band

  • fair 73.3%
  • good 26.7%

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 056043. The text on this page is generated automatically from the data.