首先，fence的定義，起碼在字麵上，並沒有包括灌木或者樹叢。你所說的landscape screen, 字麵上有強迫伸展，並不很恰當地指樹叢。所以你要是以籬笆的法律去管人家的樹叢，有一定困難。
你一定要去和鄰居爭什麽是screen，什麽是灌木，隨你便。隻是提醒一下你的法律依據不是很可靠。
http://vancouver.ca/your-government/zoning-development-bylaw.aspx section 10.pdf
City of Vancouver Section 10
Zoning and Development By-law 6 May 2011
Section 10
10.16 Fences
10.16.1 For the purposes of this section, the term “fence” shall include arbors, archways, boundary fences, gates, pergolas, screens, trellises, walls and similar structures.
10.16.2 Height shall be measured from any point on the ground level of the site at the structure or fence line.
10.16.3 A fence or similar structure shall be permitted in a required yard or on the boundaries of a required yard provided it does not exceed 1.9 m in height.
10.16.4 Notwithstanding section 10.16.3, a fence or similar structure shall be permitted in a required front yard or on the boundaries of a required front yard located in the C-1 District or any R district provided it does not exceed 1.2 m in height.
10.16.5 Where a fence is erected or placed above a common boundary retaining wall or within 1.0 m of a common boundary retaining wall, the maximum permissible height shall be reduced by half the height of the retaining wall.
10.16.6 The Director of Planning may, at his discretion, permit a fence or similar structure which does not comply with sections 10.16.3, 10.16.4, and 10.16.5; however, in the case of a relaxation of the height limitations of this section, the Director of Planning shall first notify such property owners as he deems
