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Segni: 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 Segni

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: Corso Vittorio Emanuele 2, Segni.

Segni, ancient walls high in the Lepini mountains

Segni stands on a spur of the Lepini mountains, about six hundred and fifty metres up, above the Sacco valley. It is one of the oldest towns in Lazio. Ancient Signia left behind its polygonal walls, built from huge blocks of stone fitted together without mortar, and the Porta Saracena gateway. The town's name also lives on in opus signinum, the crushed-brick concrete the Romans used for floors and cisterns.

Rome is about an hour away, via the valley below where Colleferro and the A1 motorway lie, and many residents work there or in the capital. The old town has stone houses built against one another, steep streets and little room for cars; newer housing has spread along the road climbing up from the valley. At this altitude winters are cold (climate zone E in the Italian system) and heating adds to running costs, so check the energy rating closely.

Segni is slowly losing residents. At the end of 2023 there were 8,976, down 1.4% on 2011 according to Istat, the national statistics office. The estimated average age is 47.1 against 46.0 for the metropolitan area of Rome, and 25.2% of residents are over 65 (province: 22.9%). Foreign residents make up 6.6%. Declared incomes are well below the provincial average, although that average is pushed up by the capital.

The town is in seismic zone 2 of the Civil Protection classification, like 97 of the 121 municipalities in the province, with expected ground acceleration in the built-up area of about 0.132 g. For a stone house in the old centre, ask whether any structural work has been done and how the walls and floors are tied together.

On a rocky spur the slopes are steep, and around the edges of the town ground stability varies from place to place. The report checks the official landslide maps for the address and finds the plot on the Revenue Agency (Agenzia delle Entrate) cadastral maps.

Key points

  • Ancient hill town in the Lepini mountains, above the Sacco valley.
  • Polygonal walls and the Porta Saracena of ancient Signia.
  • 25.2% over 65; population falling since 2011.
  • Seismic zone 2, expected acceleration about 0.132 g.

Overview

Segni is a municipality in the province of Roma, in Lazio. At the end of 2023 it had 8,976 residents, ranked 45 of 121 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Segni 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 0.132 g, a moderate value: the level with a 10% probability of being exceeded in 50 years, on rock.

For anyone buying in Segni, 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 1.4%. 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 6.6% of the population. On average, a household has 2.2 members.

Income and climate

In tax year 2024, taxpayers in Segni declared an average taxable income of 23,470 euros, below the provincial average (28,682 euros). The Italian average is 24,895 euros.

Segni is in climate zone E, with 2,331 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 668 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Segni has 7 schools and 2 pharmacies. The Overture Maps data also lists 5 grocery shops and supermarkets and 2 healthcare facilities.

There are 0.2 healthcare facilities per 1,000 residents, fewer than the province average (0.8).

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 5.5% of the land in Segni, compared with 13.2% in the province and 8.2% in the region. In 2024 built-up land grew by 0.5 hectares.

Radon and contaminated sites

According to the ISPRA map, the estimated radon emission in the municipality is high. 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 Segni.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Segni: 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 Segni 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 38 inhabited census areas in Segni. Half of the residents live in areas scoring 66 or more.

Residents by band

  • modest 11.9%
  • fair 30.2%
  • good 57.9%

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 058102. The text on this page is generated automatically from the data.