How to Calculate Square Meters of Prefabricated Houses

The calculation of square meters for prefabricated houses is primarily based on the structural type of the building and measurement specifications, with different calculation methods for different structural types, as detailed below:

I. Single-story Prefabricated Houses
The area calculation for single-story prefabricated houses follows the principle of the sum of the horizontal projected areas of all floors above the exterior wall plinth. Height is a key indicator: if the house height reaches or exceeds 2.20 meters, the full area must be calculated; if the height is less than 2.20 meters, only half of the area is calculated. For spaces utilizing the interior of a sloped roof, further subdivision based on net height is required: areas with a net height exceeding 2.10 meters are calculated as full area, areas with a net height between 1.20 meters and 2.10 meters are calculated as half area, and areas with a net height of less than 1.20 meters are not included in the area calculation.

II. Multi-story Prefabricated Houses
The area calculation for multi-story prefabricated houses must be carried out floor by floor. The area of the first floor is calculated based on the horizontal area of the structural perimeter above the exterior wall plinth, while the areas of the second floor and above are calculated based on the horizontal area of the exterior wall structure perimeter. Floor height is also a core criterion: floors with a height reaching or exceeding 2.20 meters are calculated as full area, while floors with a height of less than 2.20 meters are calculated as half area. For spaces inside sloped roofs and under stadium stands, if designed as usable areas, the area must be divided based on net height: areas with a net height exceeding 2.10 meters are calculated as full area, areas with a net height between 1.20 meters and 2.10 meters are calculated as half area, and unused areas or areas with a net height of less than 1.20 meters are not included in the area calculation.

III. Other Structural Prefabricated Houses

1. Balconies: Regardless of the balcony type, the area is calculated as half of its horizontal projected area, a rule that applies to balconies in all types of prefabricated houses.
2. Canopies: The area calculation for canopies depends on their width: if the width from the outer edge of the structure to the outer edge of the exterior wall structure exceeds 2.10 meters, the area is calculated as half of the horizontal projected area of the canopy structure board; if the width is less than 2.10 meters, the area is not calculated.
3. Corridors: The area calculation for corridors depends on the structural type: corridors with permanent structures and columns are calculated as full area based on the horizontal area of the column perimeter; corridors with a roof but no columns are calculated as half of the horizontal projected area of their structural floor; and corridors without a roof and columns are generally not included in the area calculation.