The Chancery Rosewood

The Hotel

The building at 30 Grosvenor Square was designed by Finnish-American architect Eero Saarinen and completed in 1960 to house the United States Embassy in London — the only purpose-built US Embassy ever commissioned outside the Americas, and one of Saarinen's last completed projects (he died in 1961). The building's 25-foot-wingspan eagle on the west facade, sculpted by Theodore Roszak, was the image of the American diplomatic presence in Europe for fifty-seven years. The Embassy moved to Nine Elms in January 2018; Qatari Diar Europe acquired the lease in 2009 in advance of the move and commissioned Sir David Chipperfield Architects to lead the conversion. The building was Grade II*-listed during the works (the most stringent UK heritage protection) and the restoration was the most architecturally consequential transformation in Mayfair this generation. The Chancery Rosewood opened on 1 September 2025.

The accommodation comprises 144 rooms and suites organised into four signature room categories — Junior Suites, Suites, Signature Suites and the four standalone Houses. The Houses, named after Americans linked to the building's history (Saarinen House, John Adams House, Kennedy House, Chancery House), are the largest hotel accommodations in Mayfair — each a multi-bedroom apartment with its own private kitchen, dining room, drawing room, and in some cases private terraces overlooking Grosvenor Square Garden. Standard Junior Suites start at 60 square metres (one of the largest entry-level products in London); the named Suites run 80 to 140 square metres; the Houses run 220 to 540 square metres. Interiors by Joseph Dirand and the Rosewood interiors team play Saarinen's exposed structural concrete envelope against contemporary American art (the property's collection numbers 235 pieces) and bespoke Knoll upholstery in cream and tobacco.

Dining is built around three principal venues. Salon — the all-day social room beneath the original Saarinen-designed coffered ceiling — runs the lobby-bar function and the property's most photographed room. The signature restaurant is a contemporary American kitchen by an as-yet-unannounced Michelin-starred chef, opening in stages through 2026. The 7th-floor rooftop bar is the only Mayfair rooftop with a 360-degree view across Grosvenor Square Garden to the BT Tower; the bar accepts non-resident reservations on a strictly limited daily allocation. The Asaya Spa — Rosewood's wellness brand at its London flagship — covers the entire third floor with eight treatment rooms, a 25-metre vitality pool, a Watsu pool for hydrotherapy, and the only private hammam in any Mayfair hotel.

Position is the second proposition. Grosvenor Square is the central square of Mayfair — a four-minute walk from Bond Street, six from Oxford Street, eight from Berkeley Square's Mayfair restaurant cluster, twelve from Hyde Park Corner. The hotel sits opposite Grosvenor Square Garden (the largest garden square in Mayfair) with the Eisenhower Memorial and the September 11 Memorial Garden directly across; Marble Arch is six minutes by foot, Berkeley Square eight, Bond Street Crossrail station a five-minute level walk. For an honestly historic London honeymoon at the level where the architecture is the central feature, an anniversary calibrated around private dining in one of the Houses, or a business stay where the room itself is the meeting space, the Chancery Rosewood is now the strongest Mayfair five-star opening since Claridge's 2008 restoration.

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