Professional leases in Belgium are governed by the general provisions of the Civil Code relating to lease of things (louage de choses), specifically Articles 1714 to 1762bis. Unlike residential leases (regionalised) and commercial leases (federal law of 30 April 1951), professional leases do not benefit from specific protective legislation. This means the relationship between landlord and tenant is primarily determined by the contract itself, with the Civil Code providing only default rules where the contract is silent. A professional lease applies when the premises are used for the exercise of a liberal profession (lawyer, doctor, architect, accountant, physiotherapist, psychologist, consultant) or any non-commercial professional activity without direct public contact in a retail sense. This distinction is crucial: if the activity involves selling goods or services directly to the public in a shop-like setting, the commercial lease regime may apply instead.
There is no legally mandated minimum or maximum duration for a professional lease. Parties enjoy full contractual freedom and typically agree on terms of 3, 6, or 9 years. The lease may be concluded for a fixed term (ends automatically without notice) or an indefinite term (requires notice to terminate). For fixed-term leases, a break clause is only possible if explicitly included in the contract. Notice periods must be contractually defined, as the Civil Code does not impose specific periods for professional leases. In practice, 6 months’ notice is common. Without a contractual break clause, neither party can terminate a fixed-term lease early without paying damages. If the tenant remains in the premises after the fixed term expires without opposition from the landlord, the lease is typically considered renewed on the same terms for an indefinite period. International professionals should negotiate termination flexibility upfront given the lack of statutory protection.
The landlord must deliver the premises in good repair, maintain the structure and roof, and ensure peaceful enjoyment. The tenant must pay rent on time, use the premises according to their professional purpose, perform minor maintenance, and return the property in good condition at the end of the lease. Unlike commercial leases, the tenant has no statutory right to renewal, no right to assign the lease, and no right to compensation if the landlord refuses to renew. All such rights must be negotiated contractually. The lease should clearly specify: permitted use, whether subletting or sharing with colleagues is allowed, responsibility for fitting-out works, restoration obligations at end of term, and how charges and taxes are allocated. Registration with the FPS Finance is advisable (and gives the lease a fixed date enforceable against third parties) but is not free: registration fees apply unless the property is also used partly as a residence.
When negotiating a professional lease in Belgium, several practical points deserve attention. First, rent indexation: while there is no automatic statutory indexation for professional leases, most contracts include an annual indexation clause based on the health index. Without such a clause, rent remains fixed. Second, charges and taxes: the contract should specify which costs are borne by each party. Property tax (précompte immobilier) is legally the landlord’s obligation but can be contractually transferred to the tenant. Third, works and improvements: any right to modify the premises should be documented, along with whether improvements remain at end of lease or must be removed. Fourth, insurance: the tenant should take out professional liability insurance covering rental risks (fire, water damage, glass breakage). For expat professionals, it is important to note that a professional lease offers significantly less protection than a residential lease, making careful contract drafting essential before signing.