Skip to content
Vicinalia
Italiano Sign up

Mazzano Romano: what to know before buying a home

A municipality in the province of Roma, Lazio. Official data on earthquakes, population, services and transport.

Liveability index free for any address

Search for an address in Mazzano Romano

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 Romana 2, Mazzano Romano.

Mazzano Romano, tufa rock and the Treja valley

Mazzano Romano is a village in the countryside north of Rome, built on a spur of tufa (volcanic stone) above the Treja valley. The old village is on the high ground, hemmed in by gorges, while newer housing has spread across the plateau. Much of the valley is protected by the Valle del Treja regional park, with footpaths, waterfalls and woods along the river.

For buyers, Mazzano suits people working in Rome or nearby towns who want countryside and quiet: the capital is reached by car, with journey times that depend heavily on traffic on the Cassia or the Flaminia roads. The village has tufa houses in the old centre, detached houses with gardens and farmhouses scattered across the countryside.

Istat, the national statistics office, recorded 2,936 residents in 2023, down 3.9% since 2011. The average age of 47.6 is a little above the metropolitan figure of 46.0; over-65s make up 25.0% and foreign nationals 11.9%, a high share for a small place. Declared incomes are well below the metropolitan average, which includes Rome.

Mazzano Romano is in seismic zone 3, with an expected ground acceleration of 0.092 g. In tufa houses, check damp, the state of the walls and the foundations. The village on the cliff and houses near the Treja need a closer look: the report checks gradient and the official landslide and flood maps for the address. Climate zone D, mild winters but damp on the valley floor.

Key points

  • Countryside north of Rome, a tufa village above the Treja valley.
  • Valle del Treja regional park.
  • 2,936 residents, foreign nationals at 11.9%.
  • Seismic zone 3, expected acceleration 0.092 g.

Overview

Mazzano Romano is a municipality in the province of Roma, in Lazio. At the end of 2023 it had 2,936 residents, ranked 70 of 121 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Mazzano Romano 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 0.092 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 3.9%. The estimated average age is 48 years, higher than the province average (46). 25% of residents are over 65 (the regional figure is 23%). Foreign residents make up 11.9% of the population. On average, a household has 2.0 members.

Income and climate

In tax year 2024, taxpayers in Mazzano Romano declared an average taxable income of 21,882 euros, below the provincial average (28,682 euros). The Italian average is 24,895 euros.

Mazzano Romano is in climate zone D, with 1,649 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 200 metres above sea level.

Services

In the official Ministry of Education and Ministry of Health lists, Mazzano Romano has 3 schools and 1 pharmacy. The Overture Maps data also lists 1 grocery shop, 3 sports facilities and 1 green area.

The data shows no healthcare facilities within the municipality, against a provincial average of 0.8 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 4.4% of the land in Mazzano Romano, 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

According to the ISPRA map, the estimated radon emission in the municipality is high. 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 Mazzano Romano.

Landslides and flooding

Landslide and flood hazard changes from one street to the next even within Mazzano Romano: 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 Mazzano Romano 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 9 inhabited census areas in Mazzano Romano. Half of the residents live in areas scoring 61 or more.

Residents by band

  • fair 91.2%
  • good 8.8%

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

ISTAT code 058058. The text on this page is generated automatically from the data.