You might think the impressively low price tag ($4,200) is what makes this renovation from Parisian designers Heju so exceptional, but it’s also the size. The kitchen is nested in a top-floor chambre de bonne—typically just 65 to 130 square feet.  But Heju solved the problem with grey and white color-blocked walls, plywood fronts on budget cabinets, and more. Here's how to get the look.