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Gradisca d'Isonzo: what to know before buying a home

A municipality in the province of Gorizia, Friuli-Venezia Giulia. Official data on earthquakes, population, services and transport.

Liveability index free for any address

Search for an address in Gradisca d'Isonzo

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 Aquileia 1, Gradisca d'Isonzo.

Gradisca d'Isonzo, a Venetian fortress town on the Isonzo

Gradisca is a small walled town on the right bank of the river Isonzo, between Gorizia and Monfalcone. Venice fortified it at the end of the fifteenth century against Ottoman raids; later it passed to the Habsburgs and stayed Austrian until the First World War. The old town keeps its walls, bastions and handsome palazzi along straight streets, and feels more like a small city than its size would suggest.

Buyers here usually choose between a flat or house in the historic centre, with the restrictions and upkeep that old buildings bring, and the detached houses built outside the walls. Gorizia, Monfalcone and the regional airport at Ronchi dei Legionari are a short drive away, and Udine and Trieste are under an hour.

Gradisca uses the tavolare system inherited from Austria: ownership is recorded in the land book (libro fondiario), kept by the land registry office, and a purchase takes effect once it is entered in the book. Unlike some tavolare areas, Gradisca also has cadastral maps published by the Revenue Agency (Agenzia delle Entrate), so the report traces the address to its land parcel as elsewhere in Italy; for checks on ownership, the land book remains the reference.

There were 6,428 residents at the end of 2023, according to Istat, the national statistics office, down 1.5% since 2011. Gradisca is older than the province as a whole (average age 49.1 against 48.0, over-65s at 28.2%), households are small at 2.04 people on average, and foreign residents make up 5.8%. Declared incomes are slightly above the provincial average.

In the province of Gorizia, 10 municipalities are in seismic zone 2 and 15 in zone 3 on the Civil Protection scale. Gradisca is in zone 3, with an expected ground acceleration of about 0.165 g. Friuli remembers the 1976 earthquake well: for a house built before then, ask what structural work has been done. Near the Isonzo the report also checks the flood maps.

Key points

  • Venetian walled town on the Isonzo, between Gorizia and Monfalcone.
  • Tavolare system: ownership is checked in the land book.
  • Population down 1.5% since 2011, over-65s at 28.2%.
  • Seismic zone 3, expected acceleration about 0.165 g.

Overview

Gradisca d'Isonzo is a municipality in the province of Gorizia, in Friuli-Venezia Giulia. At the end of 2023 it had 6,428 residents, ranked 7 of 25 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Gradisca d'Isonzo is in seismic zone 3, a zone where strong earthquakes are possible but rare. Most municipalities in the province (15 of 25) are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.165 g, a medium-high 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 resident population has fallen by 1.5%. The estimated average age is 49 years, in line with the province. 28% of residents are over 65 (the regional figure is 27%). Foreign residents make up 5.8% of the population. On average, a household has 2.0 members.

Income and climate

In tax year 2024, taxpayers in Gradisca d'Isonzo declared an average taxable income of 25,113 euros, in line with the province (24,418 euros). The Italian average is 24,895 euros.

Gradisca d'Isonzo is in climate zone E, with 2,258 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 32 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Gradisca d'Isonzo has 5 schools and 2 pharmacies. The Overture Maps data also lists 3 grocery shops and supermarkets, 5 healthcare facilities and 8 sports facilities.

There are 0.8 schools per 1,000 residents, fewer than the province average (1.0).

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 24.4% of the land in Gradisca d'Isonzo, compared with 13.0% in the province and 8.1% in the region. In 2024 built-up land stayed almost the same.

Radon and contaminated sites

Gradisca d'Isonzo is not among the radon priority areas designated by the Regione Friuli Venezia Giulia in 2024. 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 one contaminated site, or site still under investigation, in Gradisca d'Isonzo, and 3 more have been cleaned up or closed. The report tells you whether one is close to the address.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Gradisca d'Isonzo: 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

Gradisca d'Isonzo uses the tavolare (land book) system, but the Revenue Agency still publishes the maps: the report finds the building's parcel, that is its sheet and parcel number, starting from the address.

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 51 inhabited census areas in Gradisca d'Isonzo. Half of the residents live in areas scoring 66 or more.

Residents by band

  • modest 0.1%
  • fair 49.4%
  • good 40.5%
  • very good 10.0%

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 031008. The text on this page is generated automatically from the data.