Website Maintenance & Service Disruption

The City will be performing scheduled maintenance from 7:30 PM to 10:30 PM on Thursday, August 20, 2026.

The following services may experience intermittent disruptions and may not be available:

From 7:30 to 10:30 on Thursday, August 20, 2026:

• All tax related online forms
  • Charity Rebate Form
  • Notice of Change of Mailing Address
  • Pre-Authorized Tax Payment (PTP) Application
  • Pre-Authorized Tax Payment (PTP) Banking Information Change
  • Pre-Authorized Tax Payment (PTP) Cancellation
  • Property Ownership Change Form
  • Senior Tax Relief Form
  • Tax Appeal Form
  • Tax Certificate Purchase

From 8:00 to 8:30 on Thursday, August 20, 2026:

• Building Investigation Request
• Traffic Data Request

Information pages on the Portal will not be affected. The outage is required to complete planned system maintenance.

We thank you for your patience in this matter. If you have any questions or concerns, please contact customerservice@markham.ca or call 905.477.5530.