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Gradoli: 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 Gradoli

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 Indipendenza 1, Gradoli.

Gradoli, above the northern shore of Lake Bolsena

Gradoli's old centre spreads along a spur of tuff rock, gathered around the Palazzo Farnese, on the heights that close off Lake Bolsena to the north-west. From the village the road drops towards the shore through vineyards and olive groves: this is where Aleatico di Gradoli is made, a sweet red wine with its own designation of origin. Viterbo is the provincial capital, and Orvieto and Tuscany are not far.

Buyers have two options. The old village, with tuff houses on several floors and narrow access, and the countryside towards the lake, with farmhouses, agricultural land and a few second homes used in summer. In the centre, look at damp, timber floors and staircases; for farmhouses, access, water supply and drainage.

In 2023 there were 1,241 residents, 15.8% fewer than in 2011 according to Istat, the national statistics office. The average age is high, 51.9 against 47.5 in the province of Viterbo, and over-65s make up 32.7%. Foreign residents account for 10.1%. Average incomes are lower than across the province.

Gradoli is in seismic zone 2, like 39 other municipalities in the Tuscia area, with an expected ground acceleration of about 0.141 g. Tuff villages often have cellars dug beneath the houses, so it is useful to know whether there is one and what condition it is in.

The Revenue Agency (Agenzia delle Entrate) cadastral maps cover the municipality, and the report reaches the land parcel from the address. On the edge of the spur and in the low ground towards the lake, landslide and flood hazard are read on the official maps for each location.

Key points

  • Tuff village above the north-west shore of Lake Bolsena.
  • Home of Aleatico di Gradoli wine, among vineyards and olive groves.
  • Over-65s at 32.7%, average age 51.9.
  • Seismic zone 2, expected acceleration 0.141 g.

Overview

Gradoli is a municipality in the province of Viterbo, in Lazio. At the end of 2023 it had 1,241 residents, ranked 50 of 60 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Gradoli 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 0.141 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

For anyone buying in Gradoli, 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 15.8%. The estimated average age is 52 years, higher than the province average (48). 33% of residents are over 65 (the regional figure is 23%). Foreign residents make up 10.1% of the population. On average, a household has 1.9 members.

Income and climate

In tax year 2024, taxpayers in Gradoli declared an average taxable income of 17,398 euros, below the provincial average (22,031 euros). The Italian average is 24,895 euros.

Gradoli is in climate zone E, with 2,254 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 470 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Gradoli has 1 school and 1 pharmacy. The Overture Maps data also lists 1 grocery shop.

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

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 2.3% of the land in Gradoli, 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 Gradoli.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Gradoli: 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 Gradoli 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 16 inhabited census areas in Gradoli. Half of the residents live in areas scoring 70 or more.

Residents by band

  • fair 23.5%
  • good 76.5%

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 056028. The text on this page is generated automatically from the data.