If part of the premises needs alteration or an extension, which department should we apply to? What is the process?

In Hong Kong, any work on premises involving structural alterations, additions or major renovations must comply with the Buildings Ordinance (Cap. 123) and may require an application to the Buildings Department. This is known as a “building plan submission”. First, you must engage an Authorised Person (usually an architect, engineer or surveyor) to assess your alteration plans. If the plans involve structural safety, fire safety, sanitary facilities or other relevant matters, the Authorised Person will determine whether a formal submission is required. If so, they will prepare the plans and related documents and submit the application to the Buildings Department on your behalf. The Buildings Department will review whether the plans comply with building standards and safety requirements. Once approval has been obtained, you must also engage a registered contractor to carry out the works. After completion, the Authorised Person will apply to the Buildings Department for a “Certificate of Completion” (also known as a “satisfaction letter”) confirming that the works have been completed in accordance with the approved plans.