Gathering Addresses in a radius map to serve a public notice?

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I need to gather addresses of property owners and renters in a 300ft. radius around my property to send a public notice regarding a development permit I'm filing with the City. This is the hard part of the public notice package I need to put together, the rest of it is fairly easy. I'm looking into some services that will do this for me but it seems like something I could do myself. Anyone here have an idea of how I could put this together?