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Colonna: what to know before buying a home

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

Liveability index free for any address

Search for an address in Colonna

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 Roma 1, Colonna.

Colonna, a small Castelli Romani town near Rome

Colonna is the Castelli Romani town that gave its name to one of the great families of the Roman nobility. It stands on a hill of volcanic origin at around three hundred and fifty metres, looking out over the countryside east of Rome, with vineyards and olive groves on the slopes.

People who buy here usually want a home outside Rome without moving too far away: the capital is reachable by car, and for trains people use stations in the surrounding towns. The historic centre has tall, narrow houses on the hill, while villas and newer blocks of flats spread over the slopes and towards the plain. The report measures the distance from the address to stops, schools and shops.

The population is growing: 4,223 residents in 2023, up 5.5% since 2011. The average age is 44.6 against 46.0 across the metropolitan city, over-65s make up 21.3% and foreign residents 10.6%. Average declared incomes are below the metropolitan average, which is lifted by Rome's wealthier districts.

In the metropolitan city of Rome, 97 municipalities are in seismic zone 2 and 24 in zone 3, as classified by Italy's Civil Protection Department. Colonna is in zone 2, with an expected ground acceleration of about 0.169 g. The Alban Hills have their own seismic activity, with frequent but usually light tremors: for an old house in the centre, ask whether walls and floors have been strengthened.

The Revenue Agency (Agenzia delle Entrate) cadastral maps are published, and the report traces the plot from the address, with elevation, slope and the official landslide and flood maps.

Key points

  • Castelli Romani town on a volcanic hill, towards Rome.
  • Up 5.5% since 2011, foreign residents 10.6%.
  • Seismic zone 2, expected ground acceleration about 0.169 g.
  • Old centre and hillside villas: two different markets.

Overview

Colonna is a municipality in the province of Roma, in Lazio. At the end of 2023 it had 4,223 residents, ranked 63 of 121 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Colonna 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 (97 of 121) are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.169 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.

For anyone buying in Colonna, 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 grown by 5.5%. The estimated average age is 45 years, in line with the province. 21% of residents are over 65 (the regional figure is 23%). Foreign residents make up 10.6% of the population. On average, a household has 2.3 members.

Income and climate

In tax year 2024, taxpayers in Colonna declared an average taxable income of 23,300 euros, below the provincial average (28,682 euros). The Italian average is 24,895 euros.

Colonna is in climate zone D, with 1,832 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 343 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Colonna has 3 schools and 1 pharmacy. The Overture Maps data also lists 3 grocery shops and supermarkets, 3 sports facilities and 1 green area.

The data shows no healthcare facilities 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 19.7% of the land in Colonna, compared with 13.2% 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 contaminated sites in Colonna.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Colonna: 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 Colonna 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 21 inhabited census areas in Colonna. Half of the residents live in areas scoring 66 or more.

Residents by band

  • modest 0.4%
  • fair 39.1%
  • good 60.5%

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 058035. The text on this page is generated automatically from the data.