During the course of his 30-plus-year career, the celebrated architect Bobby McAlpine has designed at least 500 houses. Yet even with the prodigious output, maybe three clients have known exactly what they wanted. Count among them a couple in Baton Rouge, Louisiana, who came to him for an idiosyncratic lakefront house. “They asked for a South African Cape Dutch,” explains the founder of the Montgomery, Alabama, firm McAlpine Tankersley Architecture, adding that the clients approached him because they admired a residence he once devised in that style. “They had fallen in love with Dutch architecture during their travels. So many of us instinctively recognize home when we see it, and to them, that looked like home.”