Average surface of “house” function per parish.

This map visualizes the average and median parcel surface area by parish, calculated exclusively from parcels where the term “house” appears in the cadastral “Quality” field. This filtering ensures that the analysis focuses specifically on residential properties, excluding warehouses, workshops, religious buildings, and other non-domestic uses. The results highlight notable contrasts across the city.

An analysis of median parcel area, excluding extreme high and low values, highlights several parishes where the residential fabric is notably dense, composed of many small housing plots. These Compact urban zones include the Ghetto districts (Ghetto Nuovo, Vecchio, and Nuovissimo), the Realtina area, and the central parishes of San Luca and San Zeminian. Another relevant example is the western offshoot of San Nicolò (now known as Santa Marta), which also exhibits this pattern. These parishes likely reflect working-class or modest residential zones, where land subdivision and space optimization resulted in smaller, tightly packed parcels.

In contrast, parishes with a smaller number of larger residential plots—such as San Marco or Santa Croce—reveal a different urban dynamic. These areas likely contain palatial or patrician dwellings, or large properties with extensive open spaces, gardens, or courtyards, resulting in higher median and average surface values.

It is important to note potential statistical biases, especially in small parishes where a single large estate may skew the results. For example, in San Boldo, the presence of Palazzo Civran, a substantial housing parcel, disproportionately raises the average surface area per parcel, despite the limited number of residential units in the parish.