Diadophis p. punctatus.
Broken or notched neck ring behind head, and belly has large, black half-moon shaped spots down the midline.
Look under coarse woody debris and junk piles and within rotting logs in moist woodlands. Young are often discovered in residences after first cold snap of late Summer/early Fall.
Had just finished trimming hedges when I saw this little (approximately 3-4 inches) snake sliding across the concrete. I hope I have identified it correctly.