The notice period can be shortened by mutual agreement
Yes, the notice period can be shortened by mutual agreement between landlord and tenant. This agreement must be reached after the termination notice is sent — a clause in the lease reducing the notice period in advance is void. The agreement must be in writing and signed by both parties. Either party can propose the shortening, but neither can impose it.
The statutory notice periods in Belgian residential lease law are minimum protections that cannot be reduced in advance. However, once a termination notice has been given, the parties are free to negotiate a shorter period by mutual consent. This flexibility allows for practical arrangements that benefit both sides.
For example, if a tenant gives 3 months’ notice but finds a new home earlier, they can propose to the landlord to end the lease after 2 months. If the landlord finds a new tenant quickly, they may agree.
How to formalise the agreement
| Step | Action |
|---|---|
| 1 | One party proposes a shorter notice period |
| 2 | The other party accepts (or negotiates) |
| 3 | Draft a written agreement specifying the new end date |
| 4 | Both parties sign the agreement |
| 5 | Address the rental deposit release |
| 6 | Plan the exit inventory |
The written agreement should contain:
- Reference to the original termination notice (date, sender)
- The original end date of the notice period
- The agreed new end date
- Confirmation that no further indemnity is due (or specify any agreed compensation)
- Arrangements for the exit inventory and key return
- Rental deposit release procedure
When proposing a shorter notice period, offer something in return. As a tenant, you might offer to facilitate visits for potential new tenants. As a landlord, you might waive the remaining rent for the shortened period. A fair exchange makes agreement more likely.
Legal limits on shortening the notice
Important restrictions apply:
- No advance reduction — a lease clause reducing the notice period below the statutory minimum is void and unenforceable
- Timing — the agreement must be reached after the termination notice is sent, not before
- Written form — while a verbal agreement is theoretically valid, it is nearly impossible to prove in case of dispute
- No pressure — the agreement must be freely given by both parties, without duress or economic pressure
- Indemnity remains due — shortening the notice period does not eliminate any termination indemnity owed (e.g. by the landlord for termination without reason)
The distinction between advance clauses (void) and post-notice agreements (valid) reflects the protective nature of Belgian lease law: tenants cannot be made to waive their minimum protections at the time of signing the lease.
Regional specifics
Brussels-Capital Region
The ordinance of 27 July 2017 sets minimum notice periods that cannot be reduced in advance. Post-notice agreements to shorten the period are permitted under general contract law principles. Brussels courts enforce the distinction between advance clauses and post-notice agreements.
Walloon Region
The decree of 15 March 2018 follows the same principles. Wallonia permits mutual agreements to shorten the notice period after termination has been given. The agreement must be documented.
Flemish Region
The Vlaams Woninghuurdecreet of 9 November 2018 provides similar protections. Flanders allows post-notice agreements to shorten the notice period. The decree emphasises that minimum periods cannot be reduced contractually in advance.
Regional housing legislation setting minimum notice periods (Brussels ordinance 2017, Walloon decree 2018, Flemish decree 2018). Civil Code, art. 1134 (contractual freedom for post-notice agreements).