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Calcata: 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 Calcata

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 Cadorna 1, Calcata.

Calcata, the clifftop village above the Treja valley

The old village of Calcata stands on top of a tuff cliff rising from the Treja valley, inside the regional park that protects the valley. In the twentieth century the old village was declared unsafe and its residents moved to a new settlement nearby, Calcata Nuova. From the 1960s and 1970s the old village was brought back to life by artists, craftspeople and newcomers, and it has become a day-trip destination from Rome, with workshops, cafés and restaurants.

For buyers, Calcata means two separate markets. In the clifftop village, houses are small, carved into or built against the tuff, the soft volcanic rock of this area, with pedestrian access and no parking at the door; damp, stability and planning compliance need careful checking. In Calcata Nuova and the surrounding countryside there are newer houses with gardens and parking. Rome can be reached by car, with journey times worth testing at rush hour.

In 2023 there were 909 residents, up 0.4% on 2011, according to Istat, the national statistics office. The average age of 47.2 is in line with the province of Viterbo (47.5), and over-65s make up 25.3%. Foreign residents account for 9.9% and households average 2.02 people. Declared incomes are below the provincial figure.

In the Civil Protection classification the province of Viterbo has 40 municipalities in seismic zone 2 and 20 in zone 3, Calcata among them. Expected ground acceleration is 0.102 g. In a tuff house, ask whether any strengthening work has been done and when.

The Revenue Agency (Agenzia delle Entrate) publishes cadastral maps here. For a building on the edge of the cliff or near the river, the report checks the spot against the official landslide and flood maps.

Key points

  • Village on a tuff cliff above the Treja valley.
  • Two markets: the old village and Calcata Nuova.
  • 909 residents in 2023, foreign residents at 9.9%.
  • Seismic zone 3, expected acceleration 0.102 g.

Overview

Calcata is a municipality in the province of Viterbo, in Lazio. At the end of 2023 it had 909 residents, among the smallest in the province (54 of 60).

Earthquakes

For Italy's Civil Protection Department, Calcata is in seismic zone 3, a zone where strong earthquakes are possible but rare. The region uses a finer breakdown: here the classification is 3A. Only 20 of 60 municipalities in the province are in zone 3.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.102 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 number of residents is nearly unchanged. The estimated average age is 47 years, in line with the province. 25% of residents are over 65 (the regional figure is 23%). Foreign residents make up 9.9% of the population. On average, a household has 2.0 members.

Income and climate

In tax year 2024, taxpayers in Calcata declared an average taxable income of 19,954 euros, below the provincial average (22,031 euros). The Italian average is 24,895 euros.

Calcata is in climate zone D, with 1,727 heating degree days: heating may be switched on from 1 November to 15 April, for up to 12 hours a day. The same table puts the town hall at 172 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Calcata has 1 school and 1 pharmacy. The Overture Maps data also lists 1 green area.

The data shows no grocery shops and supermarkets within the municipality, against a provincial average of 0.8 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 4.2% of the land in Calcata, 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

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 Calcata; one has been cleaned up or closed.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Calcata: 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 Calcata 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 Calcata. Half of the residents live in areas scoring 67 or more.

Residents by band

  • fair 28.0%
  • good 72.0%

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 056010. The text on this page is generated automatically from the data.