Oltre il Colle: what to know before buying a home
A municipality in the province of Bergamo, Lombardia. Official data on earthquakes, population, services and transport.
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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, Oltre il Colle.
Oltre il Colle, Zambla and the Arera at the head of Val Serina
Oltre il Colle means "beyond the pass", and that is where the village lies, on the far side of the Colle di Zambla, at the head of the Val Serina, above a thousand metres and at the foot of Pizzo Arera. The municipality is made up of several settlements, Zambla among them, with meadows, woods and paths climbing towards the peaks. In winter and summer it draws people with holiday homes here and walkers.
Buyers need to think in proper mountain terms. The municipality is in climate zone F, with long, snowy winters, so insulation, the boiler, the roof and access with snow chains matter more than elsewhere. For secondary schools, the hospital and work people go down to the Val Brembana or, over the pass, to the Val Seriana, and Bergamo is a fair drive away.
The population is older than the provincial average: an average age of 49.8 against 45.2, with over-65s at 31.7% against 22.5% in the province of Bergamo. In 2023 there were 952 residents, down 10.0% on 2011. Foreign residents account for 2.1%. Declared incomes are below the provincial average.
Earthquake risk is limited. All 243 municipalities in the province of Bergamo are in seismic zone 3 in the Civil Protection classification, and the expected ground acceleration here is 0.078 g. In stone houses it is still worth looking at the floors and roof.
On steep slopes the report measures the elevation and gradient at the house and checks the official landslide and stream maps. The Revenue Agency (Agenzia delle Entrate) publishes its maps here, and the report traces the land parcel, useful for mountain huts and old barns.
Key points
- Head of the Val Serina, beyond the Colle di Zambla.
- Above a thousand metres, climate zone F: proper mountain homes.
- All 243 municipalities in the province in seismic zone 3.
- Over-65s at 31.7%, average age 49.8.
Overview
Oltre il Colle is a municipality in the province of Bergamo, in Lombardia. At the end of 2023 it had 952 residents, ranked 188 of 243 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Oltre il Colle is in seismic zone 3, a zone where strong earthquakes are possible but rare. All 243 municipalities in the province are in the same zone.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.078 g, a moderate 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 10.0%. The estimated average age is 50 years, higher than the province average (45). 32% of residents are over 65 (the regional figure is 24%). Foreign residents make up 2.1% of the population. On average, a household has 2.0 members.
Income and climate
In tax year 2024, taxpayers in Oltre il Colle declared an average taxable income of 20,883 euros, below the provincial average (26,939 euros). The Italian average is 24,895 euros.
Oltre il Colle is in climate zone F, with 3,532 heating degree days, with no limits on when heating may be used. The same table puts the town hall at 1,030 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Oltre il Colle has 2 schools and 1 pharmacy. The Overture Maps data also lists 2 grocery shops and supermarkets.
The data shows no healthcare facilities within the municipality, against a provincial average of 0.5 per 1,000 residents.
Public transport
The open timetables available for the area do not list any stops within the territory of Oltre il Colle.
How built-up it is
Buildings, roads, car parks and other sealed surfaces cover 2.2% of the land in Oltre il Colle, compared with 12.0% in the province and 12.2% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
Oltre il Colle is not among the radon priority areas designated by the Regione Lombardia in 2023. According to the ISPRA map, the estimated radon emission in the municipality is low. 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 open contaminated sites in Oltre il Colle; one has been cleaned up or closed.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Oltre il Colle: 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 Oltre il Colle 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 22 inhabited census areas in Oltre il Colle. Half of the residents live in areas scoring 64 or more.
Residents by band
- fair 51.3%
- good 48.7%
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.
- Public transport timetables (GTFS): Trenord, Regione Lombardia - Trenord, orari ferroviari (GTFS). Licence CC BY 4.0, version 20261111.
- 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 Lombardia, national list compiled by ARPA Lombardia. Licence Atto pubblico (art. 5 L. 633/1941), 2023.
- Contaminated sites, Regione Lombardia. Licence CC0 1.0 (pubblico dominio), updated to 15 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 016146. The text on this page is generated automatically from the data.