Zoning required that a new Maryland home situated in a cove off the Choptank River adhere to the footprint of a dwelling that once occupied the site. Due to the narrow footprint of that original structure, the new building, designed by Mark McInturff, stacked upward three stories. “It’s like a modern Ark,” says the architect, “with a pool on the rooftop.” To support the house’s height and weight, McInturff used cross-braced steel frames that also serve as indoor architectural elements. On the open-plan first floor, multiple sliding doors turn living spaces into a porch while spotlighting tranquil water views. Architecture & Interiors: Mark McInturff, FAIA, McInturff Architects, Bethesda, Maryland. Builder: McInturff Architects.