| Contact | Service | Phone No | | |
| Customer Services | Application Enquiry | (02) 9847 6666 | | |
| Customer Services | Bookings - Recreation Facilities | (02) 9847 6666 | | |
| Community & Cultural Facilities | Bookings - Community Centres & Hornsby Mall | (02) 9847 6050 | | |
| Customer Services | Applications - Tree Pruning/Removal | (02) 9847 6666 | | |
| Planning and Compliance Division | Certificates - Building Certificate | (02) 9847 6760 | | |
| Planning and Compliance Division | Certificates - Planning Certificate (149) | (02) 9847 6540 | | |
| Planning and Compliance Division | Certificates - Planning Certficate (735A & 121ZP) | (02) 9847 6760 | | |
| Planning and Compliance Division | Certificates - Planning Certificate (88G) | (02) 9847 6760 | | |
| Rates Section | Certificates - Rates Certficate (603) | (02) 9847 6777 | | |
| Access to Information Officer | General - Access to Information/Privacy | (02) 9847 6027 | | |
| Information, Communication & Technology | General - Change of Contact Details | | | |
| Information, Communication & Technology | General - Online Services Registration | | | |
| Information, Communication & Technology | General - Online Services Issues | | | |
| Library & Community Services | Library Online Services | (02) 9847 6813 | | |
| Financial Services | Payments | (02) 9847 6777 | | |
| Design & Construction | Payments - Tenders | (02) 9847 6884 | | |
| Rates | Rates/Instalment Notices | (02) 9847 6777 | | |