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Modifying inventory after the legal deadline

Modifying inventory after the legal deadline

EH Par Edouard Hennin 2 min de lecture Mis a jour le May 28, 2026

In Belgium, the deadlines for completing or modifying a move-in property inventory vary by region.

Applicable deadlines

RegionDeadline to report a defectLegal basis
Brussels1 month after move-inBrussels Housing Code
Wallonia1 month after move-inWalloon lease decree
FlandersPer the lease (generally 1 month)Flemish Housing Rent Decree

Why this deadline exists

Some defects are only visible after a few days of occupation: damp problems, defective heating, non-functional electrical sockets. The one-month period allows the tenant to report these problems.

For the general framework, see our guide on the property inventory.

Procedure

  1. Identify the defect and document it (dated photos, video)
  2. Draft a registered letter to the landlord
  3. Describe the defect precisely (location, nature, impact)
  4. Request an addendum to the property inventory
  5. The landlord has 15 days to respond

Content of the letter

ElementMandatory
Date of discoveryYes
Precise description of the defectYes
Dated photos annexedRecommended
Reference to move-in inventoryYes
Request for addendumYes
Desired response deadlineRecommended

If agreed

Both parties sign an addendum to the property inventory, which supplements the original document. This addendum has the same legal value as the original inventory.

If refused

If the landlord refuses, the tenant may apply to the justice of the peace to have the defect recorded. It is recommended to engage an independent expert.

By mutual agreement

Even after the one-month period, both parties may agree to modify the inventory via a signed addendum. This amicable route is always possible.

Without agreement: limited options

SituationAvailable recourse
Hidden defect discovered lateAction under hidden defect warranty
Manifest error in the documentRequest for rectification to the judge
Structural defect (serious damp)Action against the landlord
Bad faith by the landlordLiability action
Burden of proof

After the legal deadline, the burden of proof falls on the tenant. They will need to demonstrate that the defect existed before their move-in and that they could not have identified it sooner. An expert report is virtually indispensable.

Limitation

Legal action must be brought within a reasonable time. For hidden defects, the limitation period is 1 year from discovery of the defect. For lease-related actions, the limitation is 1 year after the end of the lease.

Practical advice

For the tenant

  1. Inspect the property thoroughly from the very first days
  2. Test all equipment (heating, hot water, sockets, shutters)
  3. Photograph any defect discovered with the date visible
  4. Send the registered letter as quickly as possible
  5. Do not sign the move-in inventory under pressure

For the landlord

  • Respond within 15 days to any modification request
  • Accept justified corrections (they protect you too)
  • Draft a detailed inventory from the outset with our lease generator
  • Use a wear and tear scale to objectify wear

Centralise your inventories and correspondence with a rental management software.

Verifie & redige par
Edouard Hennin
Real estate expert since 2018, Edouard supports Belgian landlords and tenants through their rental processes. He oversees the writing of every guide in collaboration with the legal team and ensures all content reflects current legislation in Brussels, Wallonia and Flanders.
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Publie May 28, 2026
Derniere verification May 28, 2026
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