"That house down the street has 3-foot tall weeds all over the front yard"
"That car has been parked there for weeks"
"The business on the corner is so noisy I can't sleep"
"The neighbor's dog barks all day and night"
"I don't think that apartment being built over their garage complies with code"
In the City of Portland, there is a place to file a complaint for all these issues and more.
Click Here for a list of the right phone numbers for each of these issues, and many others. You can also file a complaint on line for almost all.
Personally, I've only filed one complaint like these. It was for a home under construction that had stopped the building process and let the weeds get 3-4 feet high. I filed an on line report and in two weeks they had been mowed.
Beyond removing an irritation to living, some of these things actually affect the value of all the homes in your neighborhood. So among other things, you're protecting your home's value when you file a legitimate complaint.