A Prefabricated Building, also known as a modular building or prefab building, is a structure that is built off-site in a factory before being transported and put together where it will be utilised. Instead of being constructed on-site like traditional construction, prefabricated buildings are made in sections or modules that are easily transportable and may be put together at the right location.

Prefabricated building have a number of benefits over conventional construction techniques. Among these advantages are:
1. Because prefabricated buildings are constructed in a controlled factory environment, construction speed is unaffected by bad weather or other site-specific delays. This allows for shorter construction times when compared to traditional construction methods.
2. Compared to traditional construction, prefabricated buildings are usually less expensive. Purchasing supplies in bulk, optimising the manufacturing process, and using less labour can all result in cost savings.
3. Quality control: Strict quality control processes are used during the manufacturing of prefabricated buildings. Because of the regulated atmosphere and standardised construction techniques, the quality of each module is maintained.
4. Adaptability and flexibility: Prefabricated structures can be customised to fit specific requirements and are available in a range of designs. They can be easily extended, changed, or disassembled and relocated if needed.
5. Sustainability: Prefabricated homes can be designed with energy-efficient elements and sustainable materials. Controlled manufacturing also reduces waste and its negative effects on the environment.