I've lost a link to a story that I don't remember much about so let's see if someone can interpret this into an actual story.
The little that I remember is: This is set after the canon events of Harry Potter storyline (minus the epilogue of the last book, of course) and is set pre-season 4 of Supernatural?. Harry lives near Bobby Singers' Salvage yard and Bobby helps him out occasionally (in a neighbourly type way). Harry is single and has adopted Teddy Tonks. He is keeping his location a relative secret from the magic world. Only a few, select friends know.
Dean meets Harry when he comes over to the Salvage Yard. Somehow, he, Sam and Bobby discover that Harry is a wizard. Maybe because of demons or something superntural attacking the boys. I believe Harry and Dean start a relationship during (at the beginning?) of the story.
It may be a collection of stories or just one whole story, I'm not sure.
Hopefully, someone can find this story because it is driving me crazy.