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Bomarzo: 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 Bomarzo

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 del Piano 1, Bomarzo.

Bomarzo, the Orsini village and its Sacred Wood

Bomarzo is known for the Sacred Wood, the sixteenth-century garden of stone sculptures commissioned by the Orsini family and often called the Park of Monsters. The village, in the Tuscia area around Viterbo, sits on a spur of tuff (a soft volcanic stone) crowned by Palazzo Orsini and looks towards the Tiber valley. Viterbo and Orte are within driving distance, and from Orte there are trains to Rome and the motorway.

The old centre is made of tuff houses packed together, with cellars cut into the rock and sloping lanes. Outside the village there are farmhouses, detached homes and land planted with olives and hazelnuts. For houses on the edge of the cliff, ask about any stabilisation work and check for damp in rooms cut into the rock; the report measures the slope at the address and consults the official landslide maps.

Istat, the national statistics office, counts 1,692 residents in 2023, down 6.7% from 1,814 in 2011. The average age of 48.1 is close to the provincial figure of 47.5, over-65s are 27.5% and foreign residents 8.0%. Declared incomes are in line with the provincial average.

Bomarzo is in seismic zone 2 under the Civil Protection classification, along with 39 other municipalities in the province of Viterbo, with an expected ground acceleration of 0.136 g. In tuff buildings, the state of the walls, how they connect to the floors and any openings cut into load-bearing walls are what count. The Revenue Agency publishes the cadastral maps and the report finds the parcel from the address.

Key points

  • Tuff village with Palazzo Orsini and the Park of Monsters.
  • Seismic zone 2, expected acceleration 0.136 g.
  • Population down 6.7% since 2011.
  • Cliff-edge houses: check stabilisation work and damp.

Overview

Bomarzo is a municipality in the province of Viterbo, in Lazio. At the end of 2023 it had 1,692 residents, ranked 44 of 60 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Bomarzo 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 0.136 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

For anyone buying in Bomarzo, 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 6.7%. The estimated average age is 48 years, in line with the province. 27% of residents are over 65 (the regional figure is 23%). Foreign residents make up 8.0% of the population. On average, a household has 2.1 members.

Income and climate

In tax year 2024, taxpayers in Bomarzo declared an average taxable income of 21,845 euros, in line with the province (22,031 euros). The Italian average is 24,895 euros.

Bomarzo is in climate zone E, with 2,120 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 263 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Bomarzo has 3 schools and 1 pharmacy. The Overture Maps data also lists 1 grocery shop, 2 sports facilities and 4 parks and green areas.

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 5.3% of the land in Bomarzo, compared with 4.7% in the province and 8.2% in the region. In 2024 built-up land grew by 1.2 hectares.

Radon and contaminated sites

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 contaminated sites in Bomarzo.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Bomarzo: 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 Bomarzo 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 14 inhabited census areas in Bomarzo. Half of the residents live in areas scoring 71 or more.

Residents by band

  • fair 20.7%
  • good 79.3%

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 056009. The text on this page is generated automatically from the data.