Parts of the City of Worthington are subject to the Architectural Review Board... important parts of Worthington, Old Worthington of course, but also High Street. 

Dublin Granville Rd? 

Here's a map  (pdf) of areas subject to review... I don't see a legend but the peachy areas are subject to the Architectural Review Board?  They are the Architectural Review District... looks like more areas than I realized. Looks like I answered my own question about Dublin Granville Rd.

The architectural review board is the five member Worthington planning commission plus two people "one of whom must be a resident freeholder of the Architectural Review District" according to the rules.

An agent in my office was on the Architectural Review Board when I went to lend moral support to  clients who were summoned to talk to the Worthington Architectural Review Board about changes they had made to their Old Worthington home without asking permission first. Someday I may write about that night.

The Architectural Review Board meet on the second and fourth Thursdays of each month at 7:30 p.m. in the Worthington Municipal Building at 6550 N. High St.  I believe both the Planning Commission and the Architectural Review Board take the month of August off.