A 55-year-old man attends his family physician for a routine check. He has no significant medical history and takes no medications. Over three separate visits, his automated office blood pressure readings are 152/94, 148/92 and 150/96 mmHg using a validated device and proper technique. His BMI is 29 kg/m², physical examination is otherwise normal, and baseline laboratory results are unremarkable. According to current Canadian hypertension guidelines, what is the most appropriate next step in management?