My township has strict laws on height of grass, no cracks on sidewalks, trees need to be trimmed to 10 feet above sidewalks and 14 feet above street.

Well we still need to replace the driveway and sidewalks, but that is underway.

When you start seeing bullet holes in homes,broken glass in the streets,blood on the sidewalks and police tape all over the neighborhood than you are in a war zone.

Judging from the look of the sidewalk and houses its in a high crime/ high vacancy area.

I live in a nice property where it says I'm responsible for the "yard", which includes trees, as in your lease.When the trees overgrow to where they infringe on access to my sidewalk, mailbox, driveway, patio, and roof, I don't hesitate to go out there and snip away anywhere I can reach. 

We thought maybe there was saturation from water or it got disrupted when they did the sidewalk on the other side.

I would pressure wash all the concrete sidewalks & walkways.

The first plumber she got out told her the main line to the side walk has to be changed and they charged he 7-8,000 for it and the problem was never fixed.

They'll also make sure all gutter leaders are connected, sidewalks and outdoor stairs are in good condition.  

Look for improper landscaping where tall trees are right against the sidewalk or building.