Markham By-law 2017-27, s. 8.4 — Keep Markham Beautiful (Maintenance) By-law

The Owner of a Vacant Heritage Property shall:

• a) ensure that all utilities serving the building are properly disconnected, terminated, drained or capped to prevent accidental or malicious damage, with the exception of those utilities necessary for the safety, maintenance and security of the property;
• b) ensure that appropriate utilities serving the building remain connected and used to provide, maintain and monitor proper heating and ventilation to prevent damage caused to the building by humidity, fluctuating temperatures, including the negative effects associated with freeze-thaw cycles, and other environmental conditions.