Renovation works refer to the transformation and refurbishment projects conducted on existing buildings, aimed at improving their performance, functionality, and aesthetic value. Renovation works can cater to various needs, such as improving spatial layout, enhancing the building's safety, maintaining its integrity, or fulfilling new usage requirements. The following are some common types of renovation works:

1. Interior renovation: Involves the modification and decoration of existing rooms' walls, floors, ceilings, doors, and windows to enhance the space's beauty and practicality.

2. Facade renovation: Revamps the building's exterior, such as changing the external wall materials, installing curtain walls, replacing doors and windows, to improve the building's appearance and performance.

3. Space partition renovation: Redivides the space of the existing building, such as removing walls, installing partitions, to meet different usage requirements.

4. Building extension: Conducts new construction work on the existing building foundation to expand the building's area and volume to meet new usage requirements.

Professional design and construction are required to ensure that the renovated building has good structural performance and aesthetic value. Moreover, renovation works must comply with relevant laws and standards, such as building regulations and fire safety regulations, to ensure the legality and safety of the project.