Should I subrogate for the sidewalk assessment and work done after I purchased my fourplex?.   

But the house is right up against the sidewalk along the front of the house, right up against the line on the right side, and right up against the line on the left side too. 

The house was beach pink with doors falling off, crap all in the yard, smelled like a cigarette, moldy carpet glued to the sidewalk outside, etc... after we finished making it beautiful and white, pulling carpet and sealing sidewalk with a nice color, landscaping, etc, a lady teacher yelled "thank you, that really transforms the look around here, we appreciate all your work".That was cool.

Is this the sidewalk on your property or the city's? 

Brick pavers, higher at house step down half way to sidewalk.

I literally threw my Coinmach machines in the sidewalk.

If I plan on doing anything that would inconvenience them (paint the porch, replace sidewalk) I let them know 'way in advance.Twice a year, I change all the smoke/CO alarm batteries & double-check the thermostat batteries.

Here are a few items they highlighted - repaint concrete sidewalk which had been previously painted and now chipping and replace a cast iron plumbing stack, which is functioning PERFECTLY, only because it is STARTING to barnacle.

Sometimes a simple change to the grade around the foundation can fix the issue or if there is a cement side walk/patio, make sure it’s sealed.

Yes, it is written words, but so is chalk on a sidewalk.