The Rosewood Chancery opened in September 2025 in Mayfair’s former American Embassy building. I stayed there over New Year’s, as part of a London trip that also included Claridge’s and Four Seasons Park Lane. I went in with high expectations. The property exceeded most of them.
There is a divide in early reviews, which comes down almost entirely to aesthetics. This hotel is mid-century modern. Mad Men energy, dark palette, warm leather, heavy brass. If you came for classic British architecture and red-brick Mayfair warmth, you will be surprised and possibly disappointed. If you came for something that feels genuinely different in a city with an enormous amount of competition for your attention and your loyalty tier, this is worth serious consideration.
The Building
Understanding the building is essential to understanding the hotel.
The former U.S. Embassy is a brutalist structure built from Portland stone, not concrete, which matters if you are familiar with the distinction. It has sat in Mayfair for decades as an architectural disruption to the neighborhood’s character. Rosewood took on the task of softening something that was not designed to be softened.
What they did with it is genuinely impressive. The renovation spanned over a decade. To accommodate the wellness facilities, they dug an 18-meter deep basement. They added two full stories to the top of the building, where the Penthouse suites and Eagle Bar now sit. They carved out a central atrium from what was previously stacked floors of office space, which now connects the lobby all the way up to the bar. None of that atrium existed in the original structure.
The Eagle sculpture that sits on the building’s crown was removed during construction and reinstalled once complete. It is made from reclaimed B52 bomber material. You can walk directly up to it. The views of Mayfair from that vantage point are worth the trip upstairs on their own.
The Grosvenor Gardens, which will sit directly in front of the hotel, are set to open in Summer 2026. This is not a minor detail. The exterior of this hotel is still finding its finish, and the gardens are going to change the street presence significantly. If you visit before they open, you are seeing the property before its most important exterior element is complete.
Arrival
This is where a four-month-old hotel with ambitions earns its reputation, and Rosewood delivered.
We were walking over from Claridge’s, about four minutes away, on a clear winter morning. Before we reached the hotel, the bellmen ran across the street to us. They knew our names before we were on hotel grounds. They had looked us up in advance. If you have read Unreasonable Hospitality, you know exactly what protocol this is. In execution, it still lands.
Check-in happened in our upgraded suite. Our butler was already there with hot tea. He connected our phones to the Bluetooth speakers and had us on the hotel Wi-Fi before we asked. The Bentley house car is included in the rate and was offered before we had even settled in.
The flexible check-in and check-out is genuine, not aspirational. This is one of those policies that actually works here.
One note: the hotel sent the house car to Claridge’s to collect us and I missed the email. The driver waited. I mention this not as a service failure but as a reminder to stay on top of your pre-arrival communications with this team, because they are proactive enough that missing a message is on you.
The Rooms
This is an all-suite property. 144 suites and houses total, and the range is significant enough that room selection matters more here than at most properties.
A practical note upfront: the entry-level Junior Suites run approximately 570 square feet and are, in practice, well-appointed king rooms. Calling them suites is a stretch. The designation makes sense in the context of the overall room hierarchy, but set expectations accordingly if you are booking at this category.
Booking with a Rosewood Elite advisor places you at the Grosvenor Junior Suite as entry point, with an upgrade at time of booking. That distinction is material. If you are considering this hotel, this is the right way to book it.
On views and terraces: there are two sides to the hotel, and they are meaningfully different.
The Mayfair side faces Grosvenor Park and the heart of the neighborhood. The views are excellent. There are no terraces or balconies on this side of the building. If outdoor space is important to you, this eliminates these rooms.
The Mews side has terraces and, depending on who you ask, the better overall feel. Some guests prefer these views. The exception: Grand Premier suites are corner configurations on this side, larger in footprint, but without terraces. More space, no outdoor access.
Signature suite categories reach approximately 1,450 square feet. The Houses, which sit in a Residence category of their own, are each unique. I toured the Chancery House, approximately 2,500 square feet, which includes a full-sized office, a proper dining table, and a kitchen that is actually concealed until you look for it.
We stayed in a Premier Mews Suite, an upgrade from the Deluxe Mews Junior Suite. What stood out:
The minibar is fully complimentary and genuinely stocked, juices, snacks, espresso machine, and considerably more than the standard hotel minibar. The carpet is double-padded. The heated bathroom floors, especially in London in January, are one of those details that turns a good room into a room you do not want to leave. The tech is well-integrated and fits the aesthetic, control panels included. Dyson hair tools are standard, with an air wrap available on request. The dopp kits are leather and yours to keep.
One honest note: there are no Toto toilets. The plumbing in a converted brutalist embassy building with a decade-long renovation is genuinely complex, and this was one of the concessions. The toilets flush loudly. It is a quirk of the building, not of the hotel’s priorities.
Housekeeping note worth knowing: the DND and room service switches work independently. Pressing the service button while DND is still active will not trigger turndown. You need to deactivate DND first, then activate the service request. It is counterintuitive. Now you know.
Service
Four months in, the service here is operating at a standard that takes most luxury hotels years to reach.
Butler communication runs through WhatsApp. Response times were fast throughout. When our butler signed off for the evening, he told us directly and introduced whoever was covering. Dinner reservations, transfers, late-night tea, all handled through the same channel without friction.
The art concierge is a specific offering worth mentioning. There is a dedicated team member whose function is to walk guests through the art that is throughout the building, at no charge. I did not have time to do this. It is at the top of my list for the next visit.
Food and Beverage
Sera is an all-day restaurant where breakfast is served. A la carte, well-executed, broad enough in selection that you will not feel limited. Lunch and dinner shift to the Southern Mediterranean. We were satisfied with everything we ordered.
Eagle Bar is the rooftop. At night in winter, the interior leans fully into the hotel’s aesthetic, low-lit, dark and warm, the kind of bar that makes you want to order something with smoked bourbon in it. The outdoor patio will operate differently in summer. I expect it to be considerably more lively.
GSQ is the fast-casual grab-and-go concept with an outdoor terrace that seats over 350 people. We did not experience the patio in January, which is the honest answer, but it was occupied even in the cold. Once Grosvenor Gardens opens, this outlet is going to be a destination in its own right.
Jacqueline handles afternoon tea. Request a window table for street-level Mayfair views.
Tobi Masa is Chef Masayoshi Takayama’s London debut, drawing from his NYC restaurants including Masa and Kappo Masa. We had dinner there. The food was competent and the setting is well done. It did not reach the level we had hoped for, and we would likely skip it on a return visit. Your experience may differ depending on what you order.
Carbone occupies space in the building but is not a Rosewood outlet. The hotel team is still effective at securing prioritized reservations, and at this stage in Carbone’s London tenure, you want those relationships. Book early.
Wellness
The wellness facility is the most significant physical investment Rosewood made in this building, and it shows.
The 18-meter basement was purpose-built for the Asaya Spa. The result is a 25-meter indoor pool with dedicated family swim hours, a vitality pool, heated pool lounges, a co-ed sauna and steam room, cold plunge, and five treatment rooms including a couples suite. The treatment room walls are upholstered, which is a design choice that changes the acoustics and feel of the space in the right direction.
The fitness center is the first hotel installation of the Technogym Artis collection in sandstone. Pilates reformers are included. The InBody-style full body scanner is complimentary and available to all guests.
If you stay here and do not spend time in the wellness facilities, you are leaving the best part of the property unused.
Who This Hotel Is For
Guests who respond well to design-forward properties and do not require a traditionally British hotel experience to feel like they are in London. Travelers who want a hotel that functions as a base, with strong F&B, real wellness infrastructure, and service that anticipates rather than reacts.
This is also an excellent choice for anyone who values the Rosewood relationship model specifically. The butler setup, the house car, the flexible timing, and the art programming are all oriented toward a guest who wants a hotel that operates on their schedule.
It is not the right choice if classic Mayfair architecture is the point. Claridge’s and the other London institutions exist and are extraordinary at what they do. The Rosewood Chancery is doing something different.
At four months old, this property is already performing at a level that most hotels take years to reach. Once the Grosvenor Gardens open in Summer 2026, the exterior will match what the interior has already delivered.
A Note on Booking
Coordinates Collective is a Rosewood Elite partner. Booking through us places you at the Grosvenor Junior Suite as an entry point with an upgrade at time of booking, subject to availability, plus the standard preferred partner benefits. If this property is on your shortlist for London, that is the right way to approach it.
Send me where you are considering going and I will let you know how to structure the trip.
