In an apartment complex on Lloydstraat in Katendrecht, the rent of a port worker suddenly increased by 75 euros per month following a WOZ mutation. This practice has now been firmly restricted by the Supreme Court.
The Cause in Rotterdam Practice
Landlords have applied WOZ increases one-to-one to unregulated-sector rents in recent years. In neighbourhoods such as Feijenoord and the Kop van Zuid, this led to increases that sometimes far exceeded inflation. Tenants, including many international port workers, raised the alarm.
Key Points from the Judgment
The Supreme Court set out three clear principles.
WOZ Value Is No Carte Blanche
A higher WOZ value often reflects market expectations rather than concrete improvements to the dwelling. Tenants should not have to pay for speculation.
Per-Property Substantiation Required
Landlords must henceforth demonstrate that the increase in value is linked to maintenance or neighbourhood development, and not merely to a municipal valuation report.
Unreasonable Clauses Are Voidable
Unlimited or exception-free linkages are unreasonably onerous under article 6:233 BW and may be declared inapplicable.
Consequences for Tenants in the Maasstad
- Increases exceeding inflation and maintenance are contestable
- Recovery of overpaid amounts is possible for up to three years
- Written objection within six weeks of notification is required
- Disputes are handled by the Rent Tribunal or the Rechtbank Rotterdam
Adjustments for Landlords
Existing contracts must be aligned with an inflation-plus-maintenance formula. Future increases require concrete, property-specific substantiation. Threatening termination upon objection carries greater risk.
What Does This Mean Nationally and Locally?
The ruling forms part of a broader trend of tenant protection. Other automatic indexation mechanisms are also expected to be restricted. In Rotterdam, with its mix of port workers and international employees, the impact will be felt along the A15 corridor and in older harbour districts.
Steps for Tenants in Rotterdam
Have you received a WOZ-related increase in the past three years that you considered unreasonable? Request written substantiation, retain all emails and letters. Consider visiting the Juridisch Loket Rotterdam or contacting the office of Arslan at Wilhelminaplein 100, telephone 010 - 4400 400. The three-year recovery period starts once you could reasonably have been aware of the unlawfulness.