Genzano di Roma: 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 Genzano di Roma
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 Sebastiano Silvestri 1, Genzano di Roma.
Genzano di Roma, the flower festival and Lake Nemi
Genzano sits on the rim of the crater that holds Lake Nemi, along the ancient Appian Way, in the heart of the Castelli Romani hill towns south-east of Rome. The old centre steps down in terraces towards the lake, while newer districts spread out on the other side, towards the plain and the sea. The town is known for the Infiorata, the carpet of flower petals laid along the main street for Corpus Domini, and for its bread, which has protected status.
Buyers here are often looking for cooler air and lower prices than in Rome, where many residents drive every day along the Appia. The town hall stands at about 430 metres and the town is built on a slope, with steps, lanes and little parking in the centre and houses with gardens and more room in the newer areas. The report measures elevation and slope at the address and the distance to schools, shops and pharmacies.
At the end of 2023 there were 22,674 residents, down 4.7% on 2011. The population is slightly older than the province as a whole, with an average age of 46.9 against 46.0 and over-65s at 24.8%. Foreign residents make up 8.1%. Declared incomes are below the Rome metropolitan average.
Earthquake hazard is fairly high, as across the Alban Hills: Genzano is in seismic zone 2 with 96 other municipalities in the province, and expected ground acceleration is about 0.165 g. For a tuff or stone building in the old centre, ask what structural work has been done; on the crater slopes, landslides and the condition of retaining walls also matter.
The Revenue Agency (Agenzia delle Entrate) publishes the cadastral maps. The report finds the land parcel from the address and checks the official landslide and flood maps.
Key points
- On the rim of the Lake Nemi crater, along the Appian Way.
- A town on a slope: height and access change street by street.
- 22,674 residents, down 4.7% since 2011.
- Seismic zone 2, expected acceleration about 0.165 g.
Overview
Genzano di Roma is a municipality in the province of Roma, in Lazio. At the end of 2023 it had 22,674 residents, ranked 19 of 121 municipalities in the province.
Earthquakes
For Italy's Civil Protection Department, Genzano di Roma is in seismic zone 2, a zone where strong earthquakes are possible. The region uses a finer breakdown: here the classification is 2B. Most municipalities in the province (97 of 121) 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.
For anyone buying in Genzano di Roma, 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 4.7%. The estimated average age is 47 years, in line with the province. 25% of residents are over 65 (the regional figure is 23%). Foreign residents make up 8.1% of the population. On average, a household has 2.3 members.
Income and climate
In tax year 2024, taxpayers in Genzano di Roma declared an average taxable income of 23,505 euros, below the provincial average (28,682 euros). The Italian average is 24,895 euros.
Genzano di Roma is in climate zone D, with 1,982 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 435 metres above sea level.
Services
In the official Ministry of Education and Ministry of Health lists, Genzano di Roma has 15 schools and 7 pharmacies. The Overture Maps data also lists 17 grocery shops and supermarkets, 21 healthcare facilities, 23 sports facilities and 2 parks and green areas.
There are 0.7 grocery shops and supermarkets per 1,000 residents, more than the province average (0.4).
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 20.7% of the land in Genzano di Roma, compared with 13.2% in the province and 8.2% in the region. In 2024 built-up land stayed almost the same.
Radon and contaminated sites
Official databases list 2 contaminated sites, or sites still under investigation, in Genzano di Roma. 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 Genzano di Roma: 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 Genzano di Roma 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 68 inhabited census areas in Genzano di Roma. Half of the residents live in areas scoring 71 or more.
Residents by band
- fair 21.8%
- good 78.2%
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.
- 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 058043. The text on this page is generated automatically from the data.