The symbolic setting is any city that you would like it to be in. The only other key piece of the setting is that it is after a nuclear bomb has been detonated. I generally assume that the story is after a nuclear war. That would make the neighborhood and home being described as one of many across the country or world.
When the story was written, Bradbury's descriptions had to have seemed far into the future. Nuclear war was a threat yes, but homes with robot vacuums and a voice that talks to you were definitely the things of science fiction. Today though, Bradbury's story is eerily familiar. In my own home, I have two robot vacuums. An I-robot Roomba for carpets and a different one designed to mop hard floors. My home doesn't talk to me, but Google will respond to my voice commands. Siri and Cortana both can give auditory responses to commands. Amazon has the Echo speaker. It (she) has a voice, and her name is Alexa. It's possible to tell her to pick a song based on your mood. There's all kind of things in Bradbury's story that have come true, and that's scary to me. It's scary because it seems like the only thing that hasn't come true yet is the nuclear war. Let's hope that stays that way.