Treppo Ligosullo: what to know before buying a home
A municipality in the province of Udine, Friuli-Venezia Giulia. Official data on earthquakes, population, services and transport.
Liveability index free for any address
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Search for an address in Treppo Ligosullo
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 Dante Alighieri 1, Treppo Ligosullo.
Treppo Ligosullo, two Carnia villages in one municipality
The municipality of Treppo Ligosullo has existed since 2018, when Treppo Carnico and Ligosullo merged: two mountain villages in Carnia, the Alpine part of Friuli in the province of Udine. For house hunters this means that one name covers settlements that differ in altitude, orientation and distance from services, and that older documents still use the names of the former municipalities.
Daily life needs a car. Secondary schools, the hospital and most jobs are in the valley towns of Carnia, with Tolmezzo the main one, and in winter the roads and journey times change with the snow. Houses are largely stone and timber buildings, often renovated, along with homes used as holiday places. Insulation, heating and the state of the roof matter a great deal: in the mountains these are the biggest items in running costs.
In 2023 there were 677 residents, down 13.6% on the 784 the two municipalities had together in 2011. The estimated average age is 49.7, against 48.5 for the province, and over-65s are 30.7% against 27.8%. Foreign residents make up 3.4%, and average declared income is lower than in the province.
Carnia is earthquake country. In the province of Udine, 19 municipalities are in seismic zone 1 and 71 in zone 2 of the Civil Protection classification; Treppo Ligosullo is in zone 2, with an expected acceleration of about 0.180 g. For an older house, ask whether it was rebuilt or strengthened after the 1976 Friuli earthquake, and with what permits.
The Revenue Agency (Agenzia delle Entrate) publishes cadastral maps for the municipality; the report traces the address to its land parcel and checks elevation, slope and the official landslide maps.
Key points
- Formed in 2018 from Treppo Carnico and Ligosullo, in Carnia.
- 677 residents, down 13.6% since 2011.
- Seismic zone 2, expected acceleration about 0.180 g.
- Over-65s at 30.7%, against 27.8% in the province.
Overview
Treppo Ligosullo is a municipality in the province of Udine, in Friuli-Venezia Giulia. At the end of 2023 it had 677 residents, ranked 113 of 134 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Treppo Ligosullo is in seismic zone 2, a zone where strong earthquakes are possible. Most municipalities in the province (71 of 134) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.180 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Treppo Ligosullo, 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 13.6%. The estimated average age is 50 years, in line with the province. 31% of residents are over 65 (the regional figure is 27%). Foreign residents make up 3.4% of the population. On average, a household has 2.0 members.
Income and climate
In tax year 2024, taxpayers in Treppo Ligosullo declared an average taxable income of 20,617 euros, below the provincial average (25,508 euros). The Italian average is 24,895 euros.
Treppo Ligosullo is in climate zone F, with 3,680 heating degree days, with no limits on when heating may be used. The same table puts the town hall at 949 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Treppo Ligosullo has 1 school.
The data shows no pharmacies within the municipality, against a provincial average of 0.4 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 1.6% of the land in Treppo Ligosullo, compared with 6.8% in the province and 8.1% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
Treppo Ligosullo 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 no contaminated sites in Treppo Ligosullo.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Treppo Ligosullo: 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 Treppo Ligosullo 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 8 inhabited census areas in Treppo Ligosullo. Half of the residents live in areas scoring 56 or more.
Residents by band
- modest 7.8%
- fair 92.2%
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
- Seismic classification of municipalities, Dipartimento della Protezione Civile. Licence CC BY 4.0, updated to 2025-05.
- MPS04 seismic hazard model, INGV. Licence CC BY 4.0, 2004 model.
- Data by census section, Istat. Licence CC BY 4.0, residents at the end of 2023, compared with the 2011 census.
- Places, Overture Maps Foundation. Licence CDLA Permissive 2.0 and others depending on provider, release 2026-10-21.0.
- Income and main IRPEF variables by municipality, MEF, Dipartimento delle Finanze. Licence CC BY 3.0 IT, tax year 2024.
- Climate zones and heating degree days of municipalities (Presidential Decree 412/1993, Annex A), Normattiva. Licence CC BY 4.0, current text.
- Land take, territorial dynamics and ecosystem services, ISPRA e SNPA. Licence CC BY 4.0, 2024 data.
- Predictive radon map by municipality, ISPRA. Licence CC BY 4.0, version 2022-11.
- Radon priority areas (Legislative Decree 101/2020), Regione Friuli Venezia Giulia, national list compiled by ARPA Lombardia. Licence Atto pubblico (art. 5 L. 633/1941), 2024.
- Contaminated sites, ISPRA, MOSAICO - Banca dati nazionale dei siti oggetto di procedimento di bonifica. Licence CC BY 4.0, updated to 12 November 2026.
- Liveability index by census area, Vicinalia, from the data in the report sections. Licence CC BY-SA 4.0, worked out on 30 September 2026.
- List of Italian municipalities, Istat. Licence CC BY 4.0, updated to 21 February 2026.
ISTAT code 030191. The text on this page is generated automatically from the data.