Letting a few nights a month is anything but informal in Belgium. Four layers of rules stack up, and clearing one does not exempt you from any of the others.
1. The Region: prior declaration or registration
Tourism is a regional competence, and each Region imposes a formality before the first night.
- Brussels-Capital Region: tourist accommodation is subject to a registration procedure, with safety and insurance conditions. The number obtained must appear in listings.
- Wallonia: the Walloon Tourism Code organises the declaration of accommodation and, for certain protected designations, an authorisation.
- Flanders: the accommodation decree (logiesdecreet) requires prior notification and compliance with minimum standards.
In all three cases, booking platforms are required to relay or check these identifiers. Letting without being in order exposes you to administrative fines.
2. Co-ownership: the rules take precedence
This is the obstacle most often discovered too late. A deed of base or internal rules may reserve the building for residential use, prohibit commercial activity, or explicitly forbid short-term letting. That prohibition applies even if the Region has registered you.
Read the deed of base before buying with that intention in mind. A general meeting can amend the rules, but at the majorities set by law, which is never a given.
3. Planning: change of use
Durably converting a home into tourist accommodation may constitute a change of use subject to a planning permit, depending on the Region and the intensity of the activity. Some municipalities add their own rules: quotas per district, maximum density, restrictions on certain streets.
The legal distinction often turns on regularity and scale: letting your main residence a few weeks a year is not the same as operating a flat all year round.
4. Taxation: three streams, not one
A short stay invoiced to a guest in fact blends:
- making the property available, taxed as immovable income;
- letting the furniture, taxed as movable income;
- the services — cleaning, breakfast, linen, check-in — falling under miscellaneous or professional income.
If services become significant and the activity regular, the whole can shift into professional income, with social contributions and VAT. The contract and the invoicing must reflect that breakdown; failing that, the tax authority may reclassify the lot.
Before you start, a question of yield
Short-term letting shows flattering nightly rates, but it assumes irregular occupancy, real management costs and heavier taxation than a standard lease. The honest comparison is on net annual yield, not on a summer night's rate — and it starts with knowing what the property is genuinely worth in its municipality's market.