Ottawa : Règlement no 2013-416, art. 74 — Property Standards By-law

1) Fences, retaining walls and other enclosures or structures around or on land appurtenant to vacant building or on vacant land shall be kept,

• a) in good repair;
• b) free from accident hazards;
• c) protected by paint, preservatives or other weather-resistant material, except for wooden fences made of cedar, redwood or treated wood;
• d) so as not to present an unsightly appearance; BY-LAW NO. 2013-416
• e) stable;
• f) vertical, unless specifically designed to be other than vertical, as in the case of retaining walls; and
• g) free of barbed wire. 2) Unsightly markings, stains or other defacements, including graffiti, on the exterior surfaces of fences, retaining walls or other enclosures or structures appurtenant to a vacant building or on vacant land shall be removed and the surface shall be refinished

when necessary. ACCESSORY BUIDINGS AND OTHER STRUCTURES