What is a commercial lease?
A commercial lease is a rental agreement for a property intended for operating a business with direct contact with customers. The activities covered include retail trade, artisanal businesses with direct sales, and in certain cases assimilated liberal professions.
The tenant benefits from specific protection recognising the value of the business developed on the premises: customer base, location and signage. This protection is at the heart of the law of 30 April 1951.
Commercial leases are distinct from residential leases (primary residence, student, shared housing), non-commercial office leases, and agricultural leases.
Legal framework: law of 30 April 1951
The law of 30 April 1951 on commercial leases is a federal law. Unlike residential leases, which have been regionalised since 2014, commercial leases remain a national competence in Belgium. This law supplements the Belgian Civil Code.
Key principles:
- Enhanced protection of the tenant-trader.
- Minimum duration of 9 years.
- Right to renewal under certain conditions.
- Framework for rent revision.
- Strict procedures for terminating the lease.
A commercial lease agreement in Belgium must comply with these rules. Any clause to the contrary is deemed unwritten.
Duration of the commercial lease: 9-year minimum
The standard duration is a minimum of 9 years. The tenant may terminate at the end of each triennial period (3, 6 years) with 6 months’ notice sent by registered letter or bailiff’s writ.
The landlord cannot terminate unilaterally except for serious and exceptional grounds. The parties may agree on a longer duration (12, 18, 27 years) — less common but usual for major investments.
Rent indexation
Rent indexation for a commercial lease applies annually, on the anniversary of the signing date, based on the health index.
Formula: initial rent x (new index / base index).
- Base index = index of the month preceding the signing.
- New index = index of the month preceding the anniversary date.
Unlike residential leases, commercial leases are not subject to EPC caps. For more details: rent indexation section.
Renewal of the commercial lease
Renewal is a fundamental right of the commercial tenant. At the end of the 9-year lease, the tenant may request renewal for an additional 9 years. The request must be made between 18 and 15 months before expiry, by registered letter or bailiff’s writ.
The landlord may refuse only on strict legal grounds: personal occupation, reconstruction of the building, serious breach, insufficient legitimate interest. In the event of an unjustified refusal, the tenant may obtain an eviction indemnity (up to 3 years’ rent).
Lease assignment
Assignment of a commercial lease is possible and is generally linked to the sale of the business as a going concern. The tenant may assign the lease to the buyer, unless a clause states otherwise.
Formalities: notification to the landlord by registered letter, express consent in certain cases (approval clause), maintenance of the assignor’s obligations for a minimum of 2 years. Sub-letting is more strictly regulated and generally prohibited without the landlord’s written consent.
Contract registration
Registration of the commercial lease is not systematically mandatory but is strongly recommended. It provides a fixed date for the contract, enforceable against third parties.
Registration fee: 0.20% of the total rent and charges over the duration of the lease. Payable within 4 months of the signing date.
Templates and examples
Our platform offers a template compliant with the law of 30 April 1951, downloadable in PDF and Word format. Included details: parties, address, activity, duration, rent, indexation, EPC certificate, renewal and assignment clauses.
For a personalised lease, use our online lease creator.
Regional specificities
The commercial lease is federal, but certain regional rules apply:
- Wallonia: check the related regional rules (local taxation, urban planning).
- Brussels: dedicated page for the 19 municipalities.
- Flanders: the Flemish Housing Rental Decree does NOT apply to commercial leases (which remain federal).
In all cases, the law of 30 April 1951 remains the primary reference.
Differences with other leases
| Type | Duration | Protection | Framework |
|---|---|---|---|
| Residential lease | 9 years (3/6/9) | Strong | Regional |
| Commercial lease | 9 years minimum | Very strong | Federal |
| Student lease | 12 months | Limited | Regional |
| Short-term lease | ≤ 3 years | Moderate | Regional |
| Furnished lease | Variable | Moderate | Regional |
A mixed lease (commercial + residential) follows commercial lease rules if the commercial activity is predominant.
Disputes: justice of the peace
In the event of a dispute, the justice of the peace of the canton where the property is located has jurisdiction. Simplified procedure, no mandatory lawyer. Moderate costs.
Common disputes: unpaid rent, contested renewal request, eviction indemnity, works, vacating the premises, refused assignment.