Sustainable Waterfront Guest House Architecture: Morris Cove by Bates Masi + Architects

In the heart of Sag Harbor, New York, Bates Masi + Architects has crafted Morris Cove, a 3,325-square-foot guest house that redefines sustainable waterfront living. Set on a narrow peninsula with water views on all sides, this architectural gem blends environmental stewardship with poetic spatial experiences. Designed for a family with a deep-rooted connection to the land, Morris Cove exemplifies how contemporary architecture can both protect and enhance its natural context.

A Site-Responsive Design on the Water’s Edge

Morris Cove is not simply a residence—it is a restorative intervention in a sensitive coastal environment. The narrow peninsula demanded a design that respected its vulnerability to erosion, flooding, and water pollution. The architects responded with a series of five pavilions—each housing private functions such as a master suite, guest suites, kitchen, and family room—connected beneath a shared roof structure.

These pavilions are arranged to create interstitial spaces that respond to weather, light, and the seasons. By breaking up the building mass, the design minimizes environmental disruption and increases permeability to the landscape. The placement of these volumes was carefully choreographed to maximize water views while preserving and enhancing the land’s hydrology.

Courtyards as Ecological and Experiential Anchors

Each pavilion is anchored by an internal courtyard, acting as both an intimate sanctuary and a high-performance stormwater system. Inspired by terrariums, these gardens contrast the wild coastal landscape with curated, introspective planting. Rainwater runoff from the folded roof structure is directed into these courtyard gardens—trickling gently along copper siding during light rain, or cascading dramatically during storms.

Functionally, these gardens are engineered ecosystems. The roof runoff is absorbed and filtered through layers of sand, gravel, and soil. Only after the rain subsides is the cleansed water returned to the aquifer, preventing erosion and improving groundwater quality. Elevated three feet above grade and supported by concrete piers, the courtyard foundations reduce the building's contact with the land and limit displacement of floodwaters during storm surges.

A Roof That Does More Than Shelter

The folded geometry of the roof serves multiple critical purposes. Visually unifying the five pavilions, the overarching roof also conceals mechanical systems above the flood line and channels rainwater into the courtyards. It creates a varied spatial experience—compressed in the private volumes, then soaring over the interstitial public spaces. These fluctuations in ceiling height and light quality echo the rhythms of the natural surroundings.

When weather permits, the operable glass walls of the public spaces disappear entirely, transforming the interiors into open-air decks. The private pavilions then read as independent cabins, linked by boardwalk-style hallways that blur the boundary between indoor and outdoor space.

Materials That Age Gracefully With the Landscape

Morris Cove’s material palette reinforces the home’s dialogue with nature. Exterior cladding in ipe wood and copper soffits continues into the interior living spaces, further dissolving the boundaries between inside and outside. Over time, the copper develops a rich patina, while the wood weathers to a silvery grey—materials that reflect the changing character of the shoreline environment.

Interior surfaces are serene and understated, featuring bleached oak floors and ceilings and walls finished in warm, tactile plaster. These materials enhance the spatial intimacy of the private pavilions, creating a tranquil contrast to the openness of the living areas and the vastness of the site beyond.

Architectural Stewardship Rooted in Love of Place

Morris Cove is more than a collection of elegant structures; it is an act of stewardship by a family deeply invested in the preservation of their land. Bates Masi + Architects’ thoughtful integration of performance-driven design and refined aesthetics demonstrates how architecture can simultaneously protect sensitive environments and deepen the human experience of place.

Every design gesture—from courtyard hydrology to operable glass walls—was conceived not just for comfort and beauty, but for environmental responsibility. In doing so, Morris Cove sets a new benchmark for sustainable waterfront guest house architecture, where every element contributes to a more resilient and harmonious relationship between people and the coastlines they cherish.