Interior designer Abbe Fenimore knew that adding a kitchen island was one of the most important decisions she’d make in remodeling her 1940s-era home in Dallas. A well-designed kitchen island can offer storage space, a work surface, comfortable seating — even a cooktop or spare sink.

But like so many aspects of kitchen design, it needs to be planned with extra care. An item this large and central isn’t something you’ll want to replace within just a few years.

So Fenimore and her husband created a cardboard island in their kitchen with precise dimensions to live with it before committing. They tinkered with the details on its size and location. They debated which features were necessary, and which were too much of a splurge or took up too much space.