Siam Bangkok Hotel
Opulent colonial-era grand hotel meets contemporary Thai luxury. Upper-crust locals mix with international travellers in the lobbies and restaurants. Formal but warm, never stuffy.
Book a Premier Room or higher overlooking the RBSC golf course — the view is genuinely surprising for central Bangkok
Why It Matters
One of Bangkok's great institutional hotels — formerly a Peninsula and then a Four Seasons — it retains decades of institutional memory, a storied lobby with floor-to-ceiling silk murals depicting Thai royal coronations, and a dining program (Biscotti is Michelin Guide-listed) that genuinely draws Bangkok residents, not just hotel guests. A USD $50 million renovation underway through 2026 is adding six new garden suites with private plunge pools, a new wellness center, and a redesigned pool terrace.
Built on former royal land in 1983 and designed by George Wimberley, Anantara Siam has lived several lives — first as a Peninsula, then as a Four Seasons — before finding its stride as the flagship of the Bangkok-based Anantara group. It sits directly opposite the Royal Bangkok Sports Club's golf course in the Ratchaprasong district, surrounded by the city's top shopping malls, with the Ratchadamri BTS station a one-minute walk away. High chandeliered ceilings, hand-painted silk murals, teak furnishings, and lush garden courtyards give the 354-room property the feel of a colonial grand hotel that's been properly lived in.
Where You'll Stay
8 room types available
Deluxe Room
The entry-level room at Anantara Siam is 42 sqm — genuinely spacious by Bangkok standards. Choose between hand-painted Thai mural styling or a more contemporary look. Marble bathroom with a separate soaking tub and rain shower. Views overlook the tropical garden, pool, cityscape, or golf course depending on room assignment.
42 sqm
Garden Suite (coming soon)
Six new Garden Suites with private plunge pools and lush landscaping are being introduced as part of the USD $50 million renovation. Expected to complete as part of the Phase 2 works ending Q2 2026.
Garden Terrace Room
Ground-level rooms opening onto the tropical garden — a genuinely rare feature for central Bangkok. Popular with Titanium loyalty members as an upgrade. These rooms are being renovated as part of the current 2025-2026 enhancement programme.
Junior Suite
Open-plan suite from 72 sqm with a separate living area. All suite guests receive Kasara Executive Lounge access and floor butler service privileges. Marble bathroom with separate soaking tub and rain shower. Green garden or golf course views.
72 sqm
Kasara Club Room
High-floor room that comes with full Kasara Executive Lounge access — the lounge is one of the better club lounges in Bangkok, offering express check-in/out, hors d'oeuvres, premium evening beverages, gourmet offerings, and complimentary private meeting room use. A dedicated concierge handles restaurant bookings and city planning.
42 sqmOne Bedroom Suite
Separate bedroom and living room configuration up to approximately 100 sqm. Separate dining area, Kasara lounge access, and butler service. These are the suites that have hosted visiting dignitaries over the hotel's 40-year history.
100 sqmPremier Room
Same 42 sqm footprint as the Deluxe but situated on a higher floor, giving better views and a slightly elevated feel. Same Thai design DNA with teak furnishings and silk fabrics. Popular upgrade target for loyalty members.
42 sqmTwo Bedroom Presidential Suite
The flagship suite at up to 126 sqm with two bedrooms, a full separate living room, dining room, and butler service. Part of the Extraordinary Suite Escapes package which includes complimentary airport transfers by Mercedes E-Class or V-Class, VIP amenities, breakfast, and Kasara lounge access.
126 sqmThe Property
Eat & Drink
9 venues on property
Restaurant
Spa & Wellness
Treatment Menu
On Property
How you'll actually spend your days.
Daily from 10am–9pm. Offers supervised activities and chemical-free Plan Toys for children of hotel guests and diners. External visitors can access for a small fee.
New daily Thai traditions introduced as part of the 2025-2026 transformation: morning alms-giving rituals, guided cultural storytelling, and Thai botanical cocktail hours at AQUA bar. Also includes seasonal floral installations and handcrafted turndown cards.
Dinner and breakfast cruises on historically restored Thai royal vessels along the Chao Phraya River. Separate from standard dinner service — book through the hotel. The Loy River Song and Loy Dream vessels are the two operational boats.
Hands-on cooking classes with hotel chefs teaching traditional Thai recipes and techniques. A long-standing programme at Anantara properties — the chefs are genuinely enthusiastic about sharing the food culture.
Group fitness classes including Pilates (new studio being added as part of renovation). Available for a surcharge.
On-site squash courts available to hotel guests.
Amenities & Practical Info
The details that matter for planning.
Multiple meeting rooms, grand ballroom, and event spaces. The hotel is a popular Bangkok MICE venue. Upper-level function spaces remain open throughout the renovation.
Complimentary Wi-Fi throughout the property.
Round-the-clock in-room dining available.
Cats and dogs up to 10kg welcome, one pet per room.
One of the better club lounges in Bangkok. Exclusive to Kasara Club Rooms and all suite guests. Covers express check-in/out, hors d'oeuvres, evening premium beverages, dedicated concierge, and complimentary private meeting room use. Also available to GHA DISCOVERY loyalty members at appropriate tier.
Second-floor outdoor pool set within tropical gardens. Widely praised as a genuine city oasis. Being redesigned with expanded greenery and elegant cabanas as part of the 2025-2026 renovation.
Complimentary parking available on site.
Electric vehicle charging stations on site.
WiFi-enabled limousines with airport greeting service. Suite guests on the Extraordinary Suite Escapes package receive complimentary roundtrip Mercedes E-Class or V-Class airport transfers. Fast Track immigration service also arrangeable.
Full gym with free weights, cardio machines, squat rack, and a separate workout/stretching studio. Being upgraded with state-of-the-art Technogym equipment, infrared sauna, and Pilates studio as part of the renovation. Steam room and sauna on site. External memberships also available.
Steam room and whirlpool spa tubs available at the health club.
BUILD YOUR ANANTARA SIAM BANGKOK HOTEL PLAN
Rooms, dining, spa, and resort experiences — organized into one trip plan.
Start Planning