When husband and wife Tarek and Cynthia decided that their aging home on Martha’s Vineyard needed to be completely replaced, they began a long search for an architect who not only would deliver a successful collaboration, but also lived on the island. It was not a small order, but serendipity—and some sleuthing—eventually played its role.

“A friend was visiting from Boston one weekend, so we walked down to the beach together, passing a new house under construction, which we had wanted to dislike, as it replaced a much-loved beach house close to a protected coastline,” recalls Cynthia. “But as the house emerged from the dunes, we couldn’t help admiring its siting and the subtle flow of the roofline.”

Upon inspecting the as-yet-unfinished house, she and Tarek found a box of tiles with architect Peter Rose’s name printed on it. Tarek called his office, only to discover that he and Rose would soon be flying out of Logan Airport in Boston on the same day. They agreed to meet at a terminal, and though Rose did not fulfill the island-resident prerequisite, the two immediately hit it off.

Since establishing his practice in the 1980s, Rose has built a portfolio of work on Martha’s Vineyard that includes both modernist and vernacular-style structures. “What is common among these buildings is a great deal of attention to the siting of them, especially in terms of topography,” he notes. One key difference separates Tarek and Cynthia’s home from the pack, however: its modular construction. “Partway into the process, we became aware of the slow, steady erosion of the bluff,” Rose says of the sloping waterfront site that’s also characterized by shallow gradations. In the event that it becomes necessary, he continues, “We thought about a design that could be moved to a new foundation with a modest amount of construction.”

Rose and his team decided to compose the house as a series of six modular structures connected by two intersecting corridors. Each of the six boxes can be lifted by crane; if the site becomes compromised, all that needs to be rebuilt is the foundation and the spaces between the modular units.

“We were anticipating that the house would have two sites,” says Rose. “In a way, we prefabricated the house on-site. If you consider the initial one to be the site of fabrication and the second one as the final site, it’s anticipating prefabrication in an intelligent way. And prefabrication always offers a benefit, whether it be cost or quality.”

In the case of East House, the benefits were time and efficiency of construction: Rose estimates it would take only a week to move those pieces, “with a couple of months to suture them together.”

With an eye toward accenting the site’s sweeping views and natural beauty, Rose designed the home with subtle, blurred boundaries between the exterior and interior while also taking measures to consider neighboring structures. “The modernity of [East House] sort of emerged accidentally,” he says, of the home’s low-slung profile. “There are two sets of rules on the Vineyard: If you do a vernacular house, you can build higher; if you build a modern house, it has to be lower.” Rose and his team opted for the latter, building a single-story structure with a series of flat, planted roofs, each topped with natural sea grasses.

The region’s climate informed the choice of concrete for the home’s distinctively minimalist—and hardy—exterior. “As you get into later fall and winter, it’s a very unbearable place, so the placing of a very tough house in that landscape made sense to me,” says Rose. “The use of concrete was like placing a boulder onto the site.” Despite the practical durability of the building material, Cynthia was not convinced, at least initially. “It was my husband who convinced me that concrete could have more to do with the Vineyard landscape—the beach, the rocks, the fog,” says Cynthia, “rather than with an underground car park.” Indeed, the subtle tones and slightly textured surfaces of the exterior panels, modulated by expanses of glass and Spanish cedar window frames, create a sense that the house is at home in, rather than at odds with, the sweeping landscape amid which it sits.

Rose’s reverence for the natural vitality of Martha’s Vineyard was also the impetus for integrating sustainable systems throughout the home: The planted roofs mitigate runoff while further integrating the building into the surrounding landscape. Rainwater is collected in the roofs, between the boxes, and directed via a copper-lined wood scupper to a belowground cistern, for use in irrigation. And geothermal wells provide radiant floor heating, which greatly reduces the size and cost of HVAC equipment.

Determined that the house maintain a relationship with its natural context, Rose also worked with landscape designer Michael Van Valkenburgh to develop the site. “He has a wonderful eye and great sense of botany,” says Rose of their collaboration. “The way this house is kind of settled in [the landscape] was entirely intentional from the beginning.” The relationship between the house and nature is just as important to Cynthia, who happily shares Rose’s sentiment: “Together, the house and landscaping enhance the experience of the site without intruding on it.”