A 58-year-old man attends his family physician for follow-up of elevated blood pressure. He has had three properly measured clinic readings over 3 months averaging 152/94 mm Hg. He has no diabetes, chronic kidney disease, or cardiovascular disease. His BMI is 29 kg/m², and his fasting lipids and glucose are normal. According to current Canadian hypertension guidelines, which is the most appropriate next step in management?