Résumé : Energy performance certificates (EPC) can help solve information asymmetries between landlords and tenants about dwellings’ energy performance. EPCs may enable rent premiums for energy efficient dwellings, incentivizing energy efficiency investment in rental property. However, low EPC disclosure rates may undermine their potential to promote investment. Using a cross-sectional dataset of residential rental advertisements from Brussels, we estimate rent premiums from EPCs under de facto voluntary EPC disclosure. We use the Heckman correction and an instrumental variable approach to tackle potential selection bias and endogeneity. First, we find that highly energy-efficient compared to inefficient dwellings earn a rent premium, provided that EPCs are disclosed (energy efficiency effect). This premium may incentivize investment in energy efficiency of rental property. Second, dwellings with average energy performance are penalized from disclosing an EPC (information effect). This may provide a strategic motivation to hide EPCs that indicate mediocre energy performance.