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Monteriggioni: what to know before buying a home

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

Liveability index free for any address

Search for an address in Monteriggioni

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 Uopini 1, Monteriggioni.

Monteriggioni, Dante's walled castle and the villages near Siena

The castle of Monteriggioni, a ring of walls and towers on a low hill along the Via Francigena pilgrim route, is so well known that Dante used it in the Inferno to describe the giants around the pit. Very few people actually live inside the walls, though. The real municipality is a scatter of villages across the hills north of Siena: Castellina Scalo, Badesse, Uopini, Strove, Abbadia a Isola and smaller hamlets, some now joined to the edge of the city.

For a buyer this difference is decisive. The villages closest to Siena are residential areas of small blocks and detached houses, handy for anyone working in the city; those towards the Montagnola hills and the Val d'Elsa are more rural, with old farmhouses and estates. The Florence to Siena motorway link crosses the municipality and makes travel quick in both directions, but homes close to the road hear it. The castle and the historic villages are protected, which limits what work can be done.

The municipality is growing, while many towns in the province of Siena are losing people. There were 9,934 residents in 2023, 7.2% more than in 2011; the estimated average age is 45.5 against 47.6 for the province, and over-65s make up 22.9% against 26.9% provincially. Foreign residents account for 10.2%. Declared incomes are well above the Siena average.

Monteriggioni is in seismic zone 3, like 30 other municipalities in the province, while 4 are in zone 2. The expected ground acceleration in the built-up area is about 0.139 g. For a stone farmhouse or a flat carved out of a rural building, ask how floors and roofs were rebuilt during the conversion.

The report starts from the address, finds the plot on the Revenue Agency (Agenzia delle Entrate) cadastral maps and checks flood and landslide hazard for that spot, which is worth doing on stream valley floors and clay hillsides.

Key points

  • Walled castle on the Via Francigena, residential villages north of Siena.
  • Population up 7.2% since 2011, average age 45.5.
  • Over-65s at 22.9%, against 26.9% in the province.
  • Seismic zone 3, expected acceleration about 0.139 g.

Overview

Monteriggioni is a municipality in the province of Siena, in Toscana. At the end of 2023 it had 9,934 residents, ranked 6 of 35 municipalities in the province.

Earthquakes

For Italy's Civil Protection Department, Monteriggioni is in seismic zone 3, a zone where strong earthquakes are possible but rare. Most municipalities in the province (31 of 35) are in the same zone.

In the built-up area, the expected ground shaking (peak ground acceleration, PGA) is about 0.139 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 7.2%. The estimated average age is 46 years, lower than the province average (48). 23% of residents are over 65 (the regional figure is 26%). Foreign residents make up 10.2% of the population. On average, a household has 2.2 members.

Income and climate

In tax year 2024, taxpayers in Monteriggioni declared an average taxable income of 28,579 euros, above the provincial average (25,404 euros). The Italian average is 24,895 euros.

Monteriggioni is in climate zone D, with 1,687 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, Monteriggioni has 6 schools and 3 pharmacies. The Overture Maps data also lists 3 grocery shops and supermarkets, 6 healthcare facilities and 6 sports facilities.

There are 0.3 grocery shops and supermarkets per 1,000 residents, fewer than the province average (0.6).

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 6.5% of the land in Monteriggioni, compared with 4.0% in the province and 6.2% in the region. In 2024 built-up land grew by 0.8 hectares.

Radon and contaminated sites

Monteriggioni is not among the radon priority areas designated by the Regione Toscana in 2025. 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 3 contaminated sites, or sites still under investigation, in Monteriggioni, and 2 more have been cleaned up or closed. 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 Monteriggioni: 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 Monteriggioni 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 103 inhabited census areas in Monteriggioni. Half of the residents live in areas scoring 61 or more.

Residents by band

  • modest 2.7%
  • fair 64.9%
  • good 32.3%

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

ISTAT code 052016. The text on this page is generated automatically from the data.