... 沒有. (不是好野去買房置產移民, 老妹是畢業後工作結婚買房)

不過, 感謝告知.
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剛查到如下:
Yes, it's true that sidewalks are actually “owned” by the city or town and not the homeowner. The municipality has a responsibility to keep sidewalks sufficiently safe under the Municipal Act (that's also the subject of another blog to come)

你說的是退縮圍牆還有視線(草坪)等要求.

看來私人土地跟政府土地的分野還是很清楚的.