Have you checked the sides of the streets in your neighbourhood?
checking sidewalks and street sides is an excellent idea. convenience parking spaces on streets with a high turnover will often be left immediately when timed out, and dedicated spaces in driveway or garage houses often have less available spots because everyone knows to leave their spots when they're finished using them for extended periods (think overnight). there's also the possibility that time has elapsed between your arrival and now. if 10 minutes make a difference to you, check again, twice it should take 25 minutes total. given 20 minutes have passed so far, keep an eye out for whether someone else can charge up while you search.