Was able to successfully create a report with 311, but they say this process takes 90 days. As has been stated, we have already been dealing with this for almost a year. Report # is: 1726776
Property tax report (public) at phila.gov shows the owner to be Todd M. Mosser. Prop taxes are three years past due and two liens have been issued.
Simple web search shows owner here: http://www.statelawyers.com/Lawyer/Profile.cfm/AttorneyID:159313
Maybe a letter to him at his firm asking him to address his responsibility?
p.s. - The weeds and overgrowth ARE obstructing passage via the public sidewalk in front of the property. It also provides sufficient cover where a person could hide and attack someone passing by.
Neighbors have reported attempts to contact owner with no success. I have called 311 twice and was put on hold for an extended period before the call was dumped with on one answering.