The housing valuation system (WWS) determines the maximum rent in the regulated sector in Leiden via points for floor area, facilities, and WOZ value. In Leiden, where the rental market is under pressure due to the university and commuters, this applies strictly to many dwellings. Rent above the liberalisation threshold (€900 in 2024) falls into the free sector, but in neighbourhoods such as Pieter de Hooch or de Maresingel, tenants often see discussions about the threshold. Landlords in Leiden may not arbitrarily add points; check your rent via huurcheck.toeslagen.nl or contact the Leiden Tenants' Association.
In the event of a rent increase, the price must remain within the WWS, particularly relevant now that Leiden is investing in student housing. The Rent Tribunal revalues upon objection and takes into account local factors such as proximity to Leiden University. Recent changes include extra points for sustainable insulation – advantageous for energy-efficient homes in the Professorenwijk – but deductions for defects such as moisture in older buildings around the centre. Tenants can challenge the appropriateness of their rent with the municipality of Leiden. In the transitional sector, common in growth areas such as Leiden-Noord, the WWS still applies. This system prevents excesses in the tight Leiden market and provides transparency for tenants in all sectors, supported by local advice centres such as the Juridisch Loket in Leiden.