 For the best in a residential real estate experience, contact Susan Berthoff at The Grace Group at 270-392-0733. Let Susan Berthoff or Stephen Ardell be your realtor. They are proven leaders when it comes to buying or selling residential property in and around Warren County. Call Susan Berthoff or Stephen Ardell, The Grace Group at 270-392-0733 or 270-938-2281. The Grace Group, a part of Keller Williams at 1550 Weston Street in Bowling Green.