<p>The Embassy's crystalline facade is the product of its external shading system and internal glazed curtain wall. The shading system reduces glare while admitting daylight and framing large open-view portals to the outside.<small><br> &copy;Richard Bryant</small></p>

The Embassy's crystalline facade is the product of its external shading system and internal glazed curtain wall. The shading system reduces glare while admitting daylight and framing large open-view portals to the outside.
©Richard Bryant

<p>The Embassy provides a strong framework for the Nine Elms district, an industrial zone under intense redevelopment on London's South Bank.<small><br> &copy;Richard Bryant</small></p>

The Embassy provides a strong framework for the Nine Elms district, an industrial zone under intense redevelopment on London's South Bank.
©Richard Bryant

<p>Built on a 4.9-acre brownfield site, the Embassy includes a civic plaza and park that, once completed, will connect the Thames embankment and Nine Elms Lane to a new pedestrian greenway extending from Vauxhall Station to Battersea.<small><br> &copy;Richard Bryant</small></p>

Built on a 4.9-acre brownfield site, the Embassy includes a civic plaza and park that, once completed, will connect the Thames embankment and Nine Elms Lane to a new pedestrian greenway extending from Vauxhall Station to Battersea.
©Richard Bryant

<p>The laminated glazing on the Embassy's multi-layer facade reflects the London sky, creating an envelope whose tonality shifts with the weather and time of day.<small><br> &copy;Richard Bryant</small></p>

The laminated glazing on the Embassy's multi-layer facade reflects the London sky, creating an envelope whose tonality shifts with the weather and time of day.
©Richard Bryant

<p>Pictured near the end of construction in 2018, the Embassy's transparent cube sits atop a colonnade that gives the building a beacon-like quality.<small><br> &copy;Richard Bryant</small></p>

Pictured near the end of construction in 2018, the Embassy's transparent cube sits atop a colonnade that gives the building a beacon-like quality.
©Richard Bryant

<p>Each of the Embassy's floors contain a garden inspired by a different United States ecosystem. These gardens enhance circulation and provide peaceful places to meet and reflect.<small><br> &copy;Richard Bryant</small> </p>

Each of the Embassy's floors contain a garden inspired by a different United States ecosystem. These gardens enhance circulation and provide peaceful places to meet and reflect.
©Richard Bryant

<p>The Embassy's crystalline facade is the product of its external shading system and internal glazed curtain wall. The shading system reduces glare while admitting daylight and framing large open-view portals to the outside.<small><br> &copy;Richard Bryant</small></p>

How can we build an embassy that reflects the core values of democracy—transparency, openness, and equality—and is welcoming, secure, and highly sustainable?

Since 1785, when John Adams became the first ambassador to the Court of St. James's, Grosvenor Square has been home to the US embassy in London. The existing embassy building was designed by Eero Saarinen in 1960. Half a century later, it had become over-crowded and unable to meet modern-day security and workplace needs.

The Embassy's cube shape provides maximum volume within a minimal perimeter, a feature that keeps the building cost- and energy-efficient.

The State Department envisioned a new embassy that would serve as the centerpiece of one of America's longest-standing and most valued relationships. It also aspired to set a new paradigm in embassy design by representing the ideals of the American government—giving priority to transparency, openness, and equality, and drawing on the best of American architecture, engineering, technology, art, and culture.

Our challenge for the Embassy was to encompass these values, creating a strong sense of welcome for the community, while also meeting specific functional requirements for security, diplomatic work, and environmental sustainability. The Nine Elms district, a South Bank industrial zone under intense redevelopment, offers a unique setting for the new embassy. With an estimated 1,000 daily visitors and 800 staff, the Embassy project is poised to establish a strong framework for the urbanization of Nine Elms. A civic plaza and park contribute to this revitalization by connecting the Thames embankment and Nine Elms Lane to a new pedestrian greenway extending from Vauxhall Station to Battersea.

An inward spiral begins at the site edges and is expressed through curving walks and forms in the landscape design that sweep past the pond to the entry court that opens to the main lobby.

Site

The Embassy stands at the center of this burgeoning area of London, with a public park containing a pond, walkways, seating, and landscape along its edges. Curving walkways continue into the interior of the building with gardens on each floor that extend the spiraling movement upward. The internal gardens evoke American landscapes, enhancing circulation by providing alternative paths through the building and informal meeting and gathering spaces.

The spiral of the site continues to the consular entry, which takes the form of a sloped garden to the building. Inside the building, the path continues upward with interior gardens on each floor.

Many features of the Embassy serve multiple purposes to balance requirements into a cohesive and compelling whole. Water, energy and materials are managed with integrated building systems that work together and enhance each other. For instance, the pond is both a landmark and a component of the site's stormwater strategy, reducing the strain on municipal sewer systems while providing a source for landscape irrigation.

Chancery

The Embassy's form is that of a transparent crystalline cube set atop a monumental colonnade—a radiant beacon at the heart of Nine Elms. Its high-performance facade is made of laminated glazing and an outer envelope of ethylene tetrafluoroethylene (ETFE), a transparent film shaped to minimize solar gain and glare, affording generous natural light throughout the interior and access to the site's striking views. The tonality of the envelope shifts with the weather and time of day.

The Embassy's design represents a holistic fusion of urbanism, building, and landscape. It is both evocative and performative, helping to define a new environment for diplomacy while mapping a passage toward a new diplomacy of the environment.