in one's own backyard
In one's own domain, in a position very close to one. For example, You didn't expect to find a first-class organist in your own backyard. [Mid-1900s] Also see close to home.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.