Ha...the “City” would probably not let him do that.
Close off the alley?
Yea, your gonna need a permit from the city, but first a survey, impact fee assessment, fire dept buyoff in writing which will need another study, an environmental impact study, and tennant lanlord hearing in court because you let them live there...
But otherwise. A couple hundred grand and five years.. No problem
Our neighborhood has an association, and all the neighbors with lawns at the end of groups of rowhouses are prohibited from gating or fencing them, so that fire engines or EMTs can get to the back of the rowhouses if necessary. Therefore, all and sundry trespass often and make their dogs poop on others’ lawns.