Firstly, the registered office of a company in Belgium should be established at the place where its administrative management is located. This is the official address that will be mentioned in your company's administrative documents (invoices and mail).
You can register your company or have it domiciled anywhere you like, provided you have permission to do so (unless you are a landlord). However, if you are a tenant, you must prior obtain authorization from your landlord beforehand. However, many landlords refuse to allow company headquarters to be registered at their property address.
This also raises the issue of privacy. All your customers and prospects will have access to your home address, which may generate problems of confidentiality and of distinguishing between professional and private assets. In the event of a legal dispute, it will always be the address of the registered office that will be used as official reference.
The sensible alternative for your head office is to choose a business center such as Servcorp, which has the official company registration license and has been operating since 2001 in Belgium.
Pay attention to the suppliers you commit with: how long they have been working in the area, whether the reviews are positive, do you know anyone using their premises, what contact you have had with the local area manager, the authenticity of the location, the branding of the address, etc.