Lots of homes that are technically in Johns Creek will actually be listed as Alpharetta. Before the city of Johns Creek was incorporated in 2006, that entire area was considered unincorporated Alpharetta. If you actually buy in Johns Creek and work in Alpharetta, you will find the commute pretty easy. In the worst traffic, I'd say 30 minutes. You could look in the Johns Creek, Alpharetta, Milton, and Roswell areas in N. Fulton. You could also consider the Alpharetta and Cumming areas in S. Forsyth where taxes are lower, homes are newer, and schools rank very high.
This is the area I know best. Would be glad to help!
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Keller Williams Realty Consultants
695 Mansell Road, Suite 102, Roswell, GA 30076