Discrimination is still a pervasive problem on the rental housing market. At the same time, the efficiency of anti-discrimination policies relies on the support for and knowledge of these policies. we examined to which extent landlords have knowledge of the anti-discrimination legislation in Belgium and whether their level of knowledge is related to their support for anti-discrimination policy measures. For these purposes, we performed a survey including vignettes among 223 private landlords. We find that landlords successfully recognize discriminatory behavior based on income and ethnic origin. Besides, private landlords' support for anti-discrimination measures is relatively high, and more so for compliance as opposed to deterrence measures. Importantly, both knowledge and support are found to be strongly related, with more knowledge relating to more support for general, targeted and compliance measures. The exception, however, is the link with support for deterrence measures (e.g. correspondence testing with sanctions or compulsory training sessions).