HDB's dedicated hotline for **carpark enforcement** is **1800-338-6622**. This is the 24-hour hotline principally for reporting illegal parking in HDB carparks and service streets. It's also possible to report illegal parking in the OneService Application. For basic enquiries about season parking, you could Speak to the key HDB Department Provider Line at **1800-225-5432**, which operates in the course of regular Office environment hrs. This number handles questions more info on season parking purposes, renewals, and also other associated administrative issues. It is important to use the proper quantity for your personal distinct problem to be certain a more rapidly response.