Ottawa : Règlement no 2013-416, art. 10 — Property Standards By-law

1) Fences, retaining walls and other enclosures or structures around or on a residential property 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;
• 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. BY-LAW NO. 2013-416 2) Unsightly markings, stains or other defacements, including graffiti, on the exterior surfaces of fences, retaining walls or other enclosures or structures shall be removed and the surface shall be refinished when necessary. 3) Subsections (1) and (2) shall not apply to a dwelling on a farm property. ACCESSORY BUILDINGS AND OTHER STRUCTURES