House Construction Using Prefabricated Components

House construction using prefabricated components is a building method that involves the industrial production of building components and their on-site assembly. It encompasses prefabricated concrete structures and steel structures, offering advantages such as shortened construction periods, reduced pollution, controllable quality, and labor savings.

Construction Process and Types

House construction using prefabricated components breaks down buildings into independent modules. These modules undergo integrated prefabrication and acceptance testing for architecture, structure, electromechanical systems, and interior decoration in factories before being transported to the site for assembly. For example, ceilings, walls, and bathroom waterproofing layers are manufactured in factories. Some scattered components are produced separately and then assembled on a final assembly platform. The main types include panel-based prefabrication, box-based prefabrication, and frame-based prefabrication. Panel-based prefabricated buildings use prefabricated wall panels and floor slabs as core components, allowing for expanded usable area but with limitations in design flexibility. Box-based prefabrication combines prefabricated functional units, increasing construction speed by 50%-70% but requiring higher transportation and lifting equipment. Modular construction represents a higher level of integration within prefabricated assembly buildings.

Advantages and Characteristics

• Shortened Construction Period: The construction period is significantly shorter than traditional methods. For instance, some projects have reduced their completion and delivery time from 2.5 to 3 years to just 1 year. Compared to traditional construction techniques, modular construction can shorten the construction period by more than 60%. In Zhejiang, a fully prefabricated residential building was assembled in just seven days.
• Reduced Pollution: It substantially reduces noise, dust, construction waste, and traffic congestion at construction sites, which are nuisance factors. Regions like Fujian have established industrial bases with policy support, achieving a more than 70% reduction in construction waste.
• Controllable Quality: Each "building block" has a detailed "ID card," including project name, product model, and production date. The position of each steel bar is precisely located, with error and precision controlled in millimeters.
• Labor Savings: The number of operating workers is less than half of that on traditional construction sites. For example, a public housing project in Shenzhen, Guangdong, reduced on-site labor by approximately 50%.

Development Status

China's prefabricated concrete technology originated in the 1950s and was initially applied to factory and residential construction. It experienced a resurgence in the 21st century due to its production efficiency and environmental advantages. Currently, Chinese-made prefabricated houses are in high demand overseas. According to customs data, in the first four months of 2026, the Guangzhou Customs District exported 1.4 billion yuan worth of mobile homes, a year-on-year increase of 38.1%. During the same period, the Shenzhen Port exported 1.68 billion yuan worth of mobile homes, a year-on-year increase of 19.6%. According to market research firm predictions, the global modular construction market size will exceed 142.8 billion US dollars by 2030.