Colli del Tronto: what to know before buying a home
A municipality in the province of Ascoli Piceno, Marche. Official data on earthquakes, population, services and transport.
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Search for an address in Colli del Tronto
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 Salaria 1, Colli del Tronto.
Colli del Tronto, above the valley from Ascoli to the sea
The name says a lot: Colli del Tronto means the hills of the Tronto, and the town sits on high ground overlooking the Tronto valley, halfway between Ascoli Piceno and San Benedetto del Tronto on the coast. Below it runs the Ascoli to the sea dual carriageway, and the valley floor is taken up by industrial buildings, retail parks and housing built over recent decades. For a hill municipality, a high share of its land is built on.
So the municipality has two sides. Up top is the old village, with traditional houses and some views over the valley; down below, near the main road, are apartment blocks, terraced houses and newer homes, handy for people working in the valley's businesses or commuting to Ascoli or the coast. Average declared incomes are close to the provincial average.
The population is growing slightly: 3,628 residents in 2023, up 1.7% on 2011 according to Istat, the national statistics office, in a province where many municipalities are losing people. The average age is 45.8 against 47.8 in the province, and over-65s make up 23.6%. Foreign residents account for 5.6%.
Almost the whole province of Ascoli Piceno is in seismic zone 2 on the Civil Protection Department's scale: 32 municipalities, Colli del Tronto included, with an expected ground acceleration in the built-up area of about 0.176 g. For a flat in a block on the valley floor, ask when it was designed, whether it has been assessed and whether any seismic upgrading has been done or approved by the residents' meeting.
On the valley floor, near the Tronto and the streams coming down from the hills, the report checks the flood maps; on the slopes, the landslide maps. The Revenue Agency (Agenzia delle Entrate) publishes the cadastral maps, and the address leads to the land parcel.
Key points
- Above the Tronto valley, halfway between Ascoli Piceno and San Benedetto.
- Up 1.7% since 2011, average age 45.8.
- Seismic zone 2, expected acceleration about 0.176 g.
- Old hill village and a valley floor with blocks, businesses and main road.
Overview
Colli del Tronto is a municipality in the province of Ascoli Piceno, in Marche. At the end of 2023 it had 3,628 residents, ranked 12 of 33 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Colli del Tronto is in seismic zone 2, a zone where strong earthquakes are possible. Most municipalities in the province (32 of 33) are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.176 g, a medium-high value: the level with a 10% probability of being exceeded in 50 years, on rock.
For anyone buying in Colli del Tronto, 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 1.7%. The estimated average age is 46 years, lower than the province average (48). 24% of residents are over 65 (the regional figure is 26%). Foreign residents make up 5.6% of the population. On average, a household has 2.4 members.
Income and climate
In tax year 2024, taxpayers in Colli del Tronto declared an average taxable income of 22,087 euros, in line with the province (22,837 euros). The Italian average is 24,895 euros.
Colli del Tronto is in climate zone D, with 1,495 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 168 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Colli del Tronto has 3 schools and 1 pharmacy. The Overture Maps data also lists 4 grocery shops and supermarkets, 3 healthcare facilities, 3 sports facilities and 1 green area.
There are 1.1 grocery shops and supermarkets per 1,000 residents, more than the province average (0.7).
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 21.4% of the land in Colli del Tronto, compared with 6.5% in the province and 7.0% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
Official databases list no contaminated sites in Colli del Tronto.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Colli del Tronto: 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 Colli del Tronto 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 33 inhabited census areas in Colli del Tronto. Half of the residents live in areas scoring 68 or more.
Residents by band
- fair 33.7%
- good 66.3%
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.
- 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 044014. The text on this page is generated automatically from the data.