Every five-star hotel in London will tell you it has a spa. Most of them mean a treatment room, a diffuser, and someone in a linen tunic offering you a herbal tea. What I’m interested in — and what’s worth crossing town for — is something more substantial: a proper wellness destination with the scale, the design intention and the calibre of therapist to justify blocking out an entire afternoon.
London’s grandest hotel spas have quietly become one of the city’s more interesting luxury stories over the past few years. Ancient hotels that went a century or more without one — Claridge’s chief among them — have finally excavated their basements and built something serious. Others have leaned into global wellness brands, borrowed resort-level thinking, or in one case, sent guests round the corner to their sister hotel entirely. Here are the eight five-star London hotels whose spas earn their reputation, in roughly descending order of scale.
The Lanesborough — London’s Reigning Champion
If you only trust one accolade, trust this: The Lanesborough Club & Spa has been named Best Spa in London at the Good Spa Awards, and on the evidence of the space itself, it’s not a hard case to make. This is a genuinely enormous facility — over 1,600 square metres — built more like an exclusive private members’ club than a hotel add-on, which in practice it partly is; London residents pay handsomely to join.
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The centrepiece is a raised, infinity-edged hydrotherapy pool with water cascading over one side, reached through a discreet black door beyond the single-sex thermal suites. Six treatment rooms carry a roster of serious resident and visiting names — La Prairie, Tata Harper, and a rotating cast of aesthetic and longevity specialists — alongside daily fitness classes ranging from Reformer Pilates to boxing. It’s the kind of spa where the details do the talking: mother-of-pearl mosaic steam rooms, a choice of warm, cool or misted rain showers, spa butlers on hand rather than a front desk.
The hotel around it is suitably grand. Overlooking Hyde Park Corner, with round-the-clock butler service standard for every room and a Bridgerton-themed afternoon tea that remains one of London’s most photographed, this is about as close as the city gets to feeling like a private palace. If your idea of a spa day is scale, seriousness and a touch of theatre, book here first.
Worth knowing: access to the spa is complimentary for hotel guests, but it’s also a working membership club, so expect it to be busier at peak times than some of the more discreet spas on this list.
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The Berkeley — Surrenne, the Wellness Club London Actually Joins
I covered The Berkeley’s rooftop pool in an earlier piece, but the spa attached to it deserves its own mention, because Surrenne has quietly become one of the most serious wellness operations in London — the kind of place non-guests pay membership fees to access, which tells you everything about how it’s regarded.
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Spanning four floors and shared with The Berkeley’s sister hotel The Emory next door, Surrenne runs to a 22-metre lap pool, a hyperbaric oxygen chamber, an ice fountain, multiple Pilates and fitness studios, and a full Tracy Anderson studio with her body-sculpting method on tap. Treatments range from FaceGym-style facial workouts to Japanese Ashiatsu massage, where therapists work using overhead ceiling bars — not something you’ll find at many hotel spas in London.
What sets it apart from the other big-scale options here is the breadth: this isn’t just a spa, it’s closer to a longevity clinic with a hotel wrapped around it. Add the seasonal rooftop pool above (heated, open roughly spring to October, with sweeping Hyde Park views) and you have two distinct wellness experiences under one roof.
Worth knowing: Surrenne membership is genuinely sought-after among Londoners, so at peak times the gym floor and studios can be busy — though the scale of the space means it rarely feels cramped.
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The Peninsula London — The Most Theatrical Newcomer
The Peninsula only opened in 2023, and its spa was built with the confidence of a brand that had already perfected this in Hong Kong, New York and Paris. Four floors beneath Hyde Park Corner, the Peninsula Spa & Wellness Centre is anchored by a 25-metre pool — lit to mimic shifting daylight, framed by grand marble pillars, with underwater music running the length of it.
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Beyond the pool, there are four thermal suites, a hydrotherapy vitality pool, a 24-hour fitness studio with Technogym kit, and — genuinely unusual for London — Ricari Studios, a mini longevity clinic offering non-invasive treatments aimed at circulation, lymphatic flow and skin tone. The in-house expert roster reads more like a Harley Street client list than a typical spa menu: a traditional Chinese medicine practitioner with over 40,000 clinical hours, a former World Cup rugby player turned personal trainer, an osteopath specialising in pain management.
It’s an unashamedly high-tech, high-spend experience, in keeping with the rest of the hotel — this is a property with $3,500-a-night suites and nail-drying technology built into the wardrobes. If you want the newest, most technologically ambitious spa in London, this is currently it.
Worth knowing: treatments here sit at the very top of the London price bracket. If budget matters more than novelty, several other spas on this list offer comparable quality for less.
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The Bulgari Hotel — Roman Grandeur, Serious Recovery Credentials
The Bulgari Spa occupies two subterranean floors and is built around one of the most architecturally distinctive pools in London — 25 metres, colonnaded in textured Vicenza stone in the style of Palladio’s great buildings, with a gold-leaf-mosaic vitality pool alongside it. Eleven treatment rooms and a private spa suite with its own hydro tub, oversized steam room and Onyx-marble finish sit around it.
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What’s changed recently, and what makes this worth a fresh look even if you’ve visited before, is the spa’s shift toward recovery and longevity science: hyperbaric oxygen therapy and a Zerobody dry float experience have both been added, putting the Bulgari on the same footing as the newer wellness-focused entrants rather than resting on its architectural laurels. The hotel itself was also recently awarded Three Keys — the top tier — in the Michelin Guide’s hotel rating system, a meaningful marker given how few UK properties hold that distinction.
It remains, in every sense, a global rather than local experience — you could be in Milan or Dubai as easily as Knightsbridge — but if flawless, brand-consistent luxury with genuinely cutting-edge recovery treatments is what you want from a spa day, this delivers.
Worth knowing: children between 8 and 16 may use the spa when accompanied by an adult, with dedicated swimming hours; outside of those windows, this is very much an adults’ retreat.
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Mandarin Oriental Hyde Park — Calm, Considered, and Quietly Excellent
Of all the spas on this list, Mandarin Oriental’s is the one I’d send a first-time visitor to if they wanted the classic five-star London spa experience done properly rather than reinvented. Designed by Adam D. Tihany around traditional Chinese symbolism — two large-scale floral wall features symbolising rebirth, a soothing palette of caramel and aqua — it has thirteen treatment rooms, a couples’ Oriental Suite with its own Rasul water temple, and a newer Movementum studio focused on functional movement rather than just massage.
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The 17-metre twin-lane pool is the most practical of any on this list if you actually want to swim rather than float — open from 6.30am to 9.30pm, which suits early risers rather than lounge-all-day types. The spa menu draws on a genuinely impressive spread of brands, from Clinique La Prairie to home-grown British names like OSKIA and Lola’s Apothecary, plus a Sleep Concierge offering sleep-focused hypnotherapy for anyone whose jet lag needs more than a bath.
Worth knowing: this is an internationally consistent Mandarin Oriental experience rather than a distinctly English one — beautifully executed, but you could find a similar spa at any Mandarin Oriental worldwide.
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The Connaught — The First Aman Spa Outside an Aman Resort
The Connaught’s Aman Spa remains one of the most atmospheric spa spaces in London, not because of its scale — it’s the most compact wellness offering on this list — but because of what it does with a small footprint. This was the first Aman Spa built anywhere outside an actual Aman resort, and it shows: five low-lit treatment suites (each with its own private dressing area and shower, dispensing entirely with a communal locker room), a black-granite, grotto-like vitality pool with a cascading water wall, and a design language of Portland stone, honey oak and burnished pewter that feels genuinely transporting given you’re three floors beneath Mayfair’s Edwardian lobby.
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The treatment menu follows Aman’s signature global format — Grounding, Purifying and Nourishing rituals using the brand’s own skincare range — delivered by therapists with real specialist credentials, including a consultant acupuncturist and an osteopath. A tea ceremony experience, guided by a practitioner with two decades of experience sourcing rare Chinese teas, is one of the more unusual additions and well worth requesting if you’re the kind of guest who wants a ritual rather than just a rub-down.
Worth knowing: the pool here is for lounging and cooling off between treatments rather than swimming lengths — if a proper lap pool matters to you, look to Mandarin Oriental or the Bulgari instead. What you’re paying for at the Connaught is intimacy and design, not scale.
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Claridge’s — A 200-Year Wait, Finally Worth It
For more than two centuries, Claridge’s operated without a spa of any kind — which makes its 2022 addition feel less like a routine amenity upgrade and more like a genuinely significant moment in the hotel’s history. Designed by André Fu, three floors beneath the Mayfair lobby, the 7,000-square-foot space draws on Fu’s own visits to Japanese temples and the Zen gardens of Kyoto: limestone, wood and water running throughout, a 12-metre entrance tunnel with dramatic shadow-play lighting, and a nine-metre, salt-treated pool built for lounging rather than laps, framed by a multi-vaulted ceiling and stone columns.
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Seven treatment rooms carry a genuinely well-curated roster — Augustinus Bader, FaceGym founder Inge Theron’s own treatment programme, Josh Wood for hair — and private cabanas around the pool mean you can happily spend a whole afternoon here without ever feeling rushed back upstairs. It’s a rare case of a spa design matching the gravitas of the hotel around it rather than feeling bolted on.
Worth knowing: because this spa is still relatively new by grand-hotel standards, resident brands and treatment offerings continue to evolve — worth checking current availability before booking a specific treatment.
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The Beaumont — Small, Intimate, and Genuinely Distinctive
The smallest and most intimate spa on this list, The Beaumont’s white-marble, Art Deco basement retreat takes its cue from the Turkish baths at the Royal Automobile Club and the original New York YMCA — an unusual and rather charming reference point that comes through in the black-and-silver detailing and the warmed marble hammam slab at its centre. Four treatment rooms, a sauna, steam room and a cold plunge sit around it, alongside a compact but well-regarded gym.
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Treatments use British skincare brand OSKIA and Moroccan hammam specialists La Sultane de Saba, with genuinely traditional hammam rituals — Dead Sea mud wraps followed by an ice bar cool-down — that feel more considered than the standard hotel spa menu. All hotel guests get one hour of complimentary spa access included in their stay, a nice touch worth remembering to actually use.
Worth knowing: the hotel’s long-running Colony Grill Room closed in October 2025, replaced by Rosi, a modern British restaurant from chef Lisa Goodwin-Allen — worth knowing if you’re planning your day around the old dining room’s Twenties atmosphere.
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COMO The Halkin — Borrowed Brilliance, Five Minutes Away
COMO The Halkin is the one genuine outlier on this list: this elegant, 41-room Belgravia boutique hotel doesn’t have its own on-site spa at all. Instead, guests are sent a five-minute walk to COMO Shambhala at the hotel’s sister property, COMO Metropolitan London, for the full treatment menu, six dedicated treatment rooms, steam facilities and gym.
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It’s a slightly unusual arrangement for a five-star hotel, but COMO Shambhala’s holistic, Asian-inspired philosophy — blending modern science with traditional practice — is genuinely well regarded, and in-room treatments can also be arranged at The Halkin itself if you’d rather not leave. For a hotel that trades on discretion and a residential, low-key atmosphere in one of London’s quietest and most affluent corners, the arrangement suits the overall character of a stay here: understated rather than showy.
Worth knowing: if a substantial on-site spa experience is central to your trip, this isn’t the hotel to build your stay around — but if you’re happy to walk five minutes for it, the quality more than compensates.
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The Bottom Line
If scale and serious wellness credentials matter most, The Lanesborough and The Berkeley’s Surrenne are the two genuine heavyweights in London right now. For architectural drama, nothing beats the Bulgari’s colonnaded pool. For intimacy and design, the Connaught’s Aman Spa and Claridge’s new basement retreat are both worth a special trip even if you’re not staying the night. And if you want the newest, most tech-forward spa the city has to offer, The Peninsula currently leads the field.
Amanda O’Brien is the creator and editor of The Boutique Adventurer. She has visited 80 countries and is a member of the British Guild of Travel Writers as well as the IFTWTA. She is passionate about wine had has just completed Level 3 of the WSET. Born in Australia, she lives in London.