Co-tenancy lease in Belgium: complete guide
Everything about the co-tenancy lease in Belgium. Single or separate lease, solidarity clause, charges allocation, replacing a co-tenant and each party's rights.
Types of co-tenancy lease
In Belgium, co-tenancy can be organised in two distinct legal ways:
Single lease (most common)
A single contract signed by all flatmates and the landlord. All flatmates are co-tenants of the same lease.
Advantages:
- A single point of contact for the landlord
- Joint liability clause possible (security for the landlord)
- A single registration, a single rental deposit
Separate leases (lease per room)
An individual contract per flatmate, covering one room and access to common areas.
Advantages:
- Complete independence between flatmates
- Departure of one flatmate without impact on the others
- No joint liability between flatmates
The choice depends on the flatmates’ profile and the landlord’s strategy. For stable co-tenancies (groups of friends, colleagues), the single lease is preferable. For high-turnover co-tenancies (student rooms), separate leases are more practical.
In addition to the lease, a co-tenancy pact (house rules) defines the rules of communal living: task sharing, use of common spaces, rules on guests. This document is not mandatory but strongly recommended.
The joint liability clause
The joint liability clause is the central element of a co-tenancy lease. It stipulates that each flatmate is responsible for the entirety of the rent and charges, not just their share.
In practice
If the rent is EUR 1,200 for 3 flatmates and one flatmate does not pay their EUR 400 share:
- With joint liability: the landlord can claim the EUR 400 from either of the two remaining flatmates
- Without joint liability: the landlord can only claim EUR 400 from the defaulting flatmate
Limits
Joint liability ends for a departing flatmate 6 months after their departure (if a replacement has not yet been found). In Flanders, the Woninghuurdecreet limits joint liability to 6 months after notified departure.
For insurance implications, consult our guide on home insurance for co-tenancy.
Splitting charges
Service charges
Service charges (water, electricity, gas, communal charges) are generally split between the flatmates. Two methods:
| Method | Advantage | Disadvantage |
|---|---|---|
| Equal shares (1/N) | Simple, no disputes | Unfair if rooms differ in size |
| Pro rata to surface area | More equitable | Requires precise calculation |
| Individual meters | The fairest | Installation cost (water, electricity) |
Rental deposit
Single lease: one rental deposit for the whole group. Amount: 2 months of total rent. The flatmates split the amount.
Separate leases: each flatmate pays their own deposit (2 months of their individual rent).
Replacing a flatmate
The replacement clause
The lease must include a replacement clause that defines:
- The departing flatmate’s notice period (generally 3 months)
- The procedure for finding a replacement
- The landlord’s right to accept or refuse the candidate
- The conditions for transferring the rental deposit
Typical procedure
- The departing flatmate notifies their departure (registered letter, 3-month notice)
- They propose one or more replacement candidates
- The landlord checks solvency and accepts/refuses (reasonable grounds)
- An amendment to the lease is signed by all parties
- Intermediate inventory of the room
- Transfer of the deposit share
Without a replacement clause in the lease, a flatmate’s departure can be problematic: the remaining flatmates must cover the full rent if joint liability applies.
Practical tips
- Draft a co-tenancy pact in addition to the lease — it prevents 80% of conflicts
- Include a clear replacement clause in the lease
- Open a joint account for rent payment (a single transfer to the landlord)
- Conduct a room-by-room inventory in addition to the overall inventory
- Register the lease free of charge — it protects all flatmates
To create a compliant co-tenancy lease with joint liability and replacement clauses, use our online lease generator. For more information, consult our guide on residential leases in Belgium.