Castelnuovo di Porto: what to know before buying a home
A municipality in the province of Roma, Lazio. Official data on earthquakes, population, services and transport.
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Search for an address in Castelnuovo di Porto
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 Montefiore 4, Castelnuovo di Porto.
Castelnuovo di Porto, a tufa hill town on the Via Flaminia
The old village of Castelnuovo di Porto sits on a spur of tufa, the soft volcanic stone of the area, gathered around its castle above the valley followed by the Via Flaminia north of Rome. The municipality belongs to the Roman countryside that slopes down to the Tiber, and part of it lies within the Veio regional park, with woods, ravines and fields. Rome is close for commuters, but rush-hour traffic on the Flaminia needs to be factored in.
The town has spread well beyond its historic core. Besides the village houses, often small and on several floors, there are neighbourhoods of detached houses and small blocks built in recent decades, and scattered clusters of homes in the countryside reached by narrow lanes. A flat in the old village and a house with a garden outside town are very different choices, including the time it takes to reach schools and shops.
In 2023 there were 8,617 residents, up 6.9% on 2011. Foreign nationals make up 15.0%, a high share for the province, while the average age of 45.2 is slightly below the provincial 46.0. Declared incomes are below the metropolitan average. Healthcare facilities are few, 0.35 per 1,000 residents against 0.84.
In the province of Rome, 97 municipalities are in seismic zone 2 and 24 in zone 3. Castelnuovo is in zone 3, with expected ground acceleration in the built-up area of about 0.109 g. In the masonry houses of the old village, check the floors and roofs and the alterations made over the years, often without an overall plan.
Tufa shapes the landscape here, with sheer cliffs and deep gullies. Along the cliff edges and at the bottom of the gullies, landslides and flooding need checking house by house, and the report does this on the official maps starting from the address.
Key points
- Tufa hill town above the Flaminia, partly in the Veio park.
- 8,617 residents, up 6.9% since 2011.
- 15.0% foreign nationals, above the provincial average.
- Seismic zone 3; cliffs and gullies to check.
Overview
Castelnuovo di Porto is a municipality in the province of Roma, in Lazio. At the end of 2023 it had 8,617 residents, ranked 46 of 121 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Castelnuovo di Porto is in seismic zone 3, a zone where strong earthquakes are possible but rare. The region uses a finer breakdown: here the classification is 3A. Only 24 of 121 municipalities in the province are in zone 3.
In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.109 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 grown by 6.9%. The estimated average age is 45 years, in line with the province. 21% of residents are over 65 (the regional figure is 23%). Foreign residents make up 15.0% of the population. On average, a household has 2.3 members.
Income and climate
In tax year 2024, taxpayers in Castelnuovo di Porto declared an average taxable income of 24,042 euros, below the provincial average (28,682 euros). The Italian average is 24,895 euros.
Castelnuovo di Porto is in climate zone D, with 1,753 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 250 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Castelnuovo di Porto has 5 schools and 2 pharmacies. The Overture Maps data also lists 4 grocery shops and supermarkets, 3 healthcare facilities, 11 sports facilities and 1 green area.
There are 0.3 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 8.4% of the land in Castelnuovo di Porto, compared with 13.2% in the province and 8.2% in the region. In 2024 built-up land grew by 7.8 hectares.
Radon and contaminated sites
Official databases list no contaminated sites in Castelnuovo di Porto.
Landslides and flooding
Landslide and flood hazard changes from one street to the next even within Castelnuovo di Porto: 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 Castelnuovo di Porto 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 45 inhabited census areas in Castelnuovo di Porto. Half of the residents live in areas scoring 65 or more.
Residents by band
- modest 0.8%
- fair 46.1%
- good 53.1%
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 058024. The text on this page is generated automatically from the data.