Anantara Siam Bangkok — 354-room Rajadamri grand hotel, formerly Regent and Four
Rajadamri, Bangkok  ·  Five-Star  ·  #9 in Bangkok

Anantara Siam Bangkok Hotel

The Rajadamri grand hotel that has worn three brand-eras since 1983 — Regent Bangkok, then Four Seasons, and since November 2015 the flagship Anantara — 354 rooms in a colonial-Thai pavilion, hand-painted silk murals by Paiboon Suwannakudt, and the city's most-decorated Saturday Brunch.

#9 in Bangkok
Anniversary Family Holiday Business Five-Star

"The Rajadamri grande dame that's outlasted its first two brand-eras — the original Bangkok statement of indoor-outdoor garden hotel architecture, the Paiboon Suwannakudt silk murals still in their original 1983 lobby placements, and a Sunday Brunch that's been the city's social anchor for two consecutive decades."

9.0
Rooms
9.4
Service
9.2
Location
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From THB 7,000 / night

The Hotel

The hotel at 155 Rajadamri Road opened in March 1983 as Regent Bangkok, designed by architect Wimon Lokitsataporn — a 354-room courtyard-pavilion plan deliberately set in opposition to the high-rise tower form that the rest of central Bangkok was adopting at the time. The building took its visual vocabulary from the indoor-outdoor sala arrangement of the Royal Palace's Chakri Maha Prasat era — an entrance saluting elephant on the porte-cochère, a colonnaded Lobby Salon framed in teak and lacquer, and a cascade of garden courtyards descending to the swimming pool. Four Seasons Hotels and Resorts took over operation in 2002 and ran the property as Four Seasons Hotel Bangkok until 31 October 2015. Minor International's Anantara brand assumed operation on 1 November 2015 and rebranded the property Anantara Siam Bangkok — making it the flagship Anantara city property in Asia. The Bencharong Suites and the building envelope are largely as designed in 1983.

The 354 rooms (including 35 suites) are organised across two interconnected courtyard wings, with all rooms looking inward across the property's gardens, the lap pool, or Rajadamri Road. The category lineup runs from the 45-sqm Premier Room (the entry category, which is a comfortably-sized standard at the Bangkok luxury level) to the 80-sqm Premier Junior Suite, the 110-sqm Anantara Suite, and the 170-sqm Bencharong Suite (the property's signature unit, with a private dining room, separate study, and a 32-sqm furnished terrace). The 2015 Anantara conversion refreshed the soft furnishings and the bathroom finishes throughout but left the iconic Paiboon Suwannakudt hand-painted silk murals — depicting the legendary Thai Tha Khae Buddhist dance-drama — in their original 1983 positions in the Lobby Salon, the Aqua Bar, and the Lord Jim's seafood restaurant.

The dining cluster is the property's most established cultural overlay. Spice Market is the original 1983-opened Thai-traditional venue, set in a recreated 19th-century Bangkok market hall (the model that almost every Thai-themed luxury hotel restaurant in Asia subsequently copied). Madison is the dry-aged steakhouse on the second floor with the city's strongest hotel-steak programme. Lord Jim's is the seafood-and-grill room overlooking the lap pool, named for Joseph Conrad's novel and serving a daily-changing market-led menu. Biscotti is the contemporary Italian under chef Davide Pirovano. Aqua Bar is the cocktail bar in the colonial conservatory. The Sunday Brunch — set across all five restaurants and the Lobby Salon, with simultaneous Champagne, oyster bar, sushi counter, foie gras station, dessert atelier, and the only chocolate fountain in any Bangkok luxury hotel that's still operationally honest — has been Bangkok's most-decorated weekly hotel brunch for two consecutive decades and remains the social anchor of the property.

The Anantara Spa is a 1,000-square-metre wellness floor with eleven treatment rooms, two couples' suites, a hammam, and an outdoor traditional Thai-massage sala in the property garden. The 25-metre lap pool with the surrounding teak-decked sun terrace is the city's most-used hotel pool, partly because the Royal Bangkok Sports Club opposite has no public access. Position is the second proposition: directly across Rajadamri Road from the Royal Bangkok Sports Club polo grounds, two minutes from CentralWorld and the Erawan Shrine, four minutes from Siam Paragon and Erawan, six minutes from the BTS Skytrain at Ratchadamri, and a 35-minute drive from Suvarnabhumi International. For travellers who want the original-canon Bangkok grand hotel format with a 40-year track record across three brand-eras intact, Anantara Siam is the considered answer.

Best Occasion Fit

Anniversary

The Bencharong Suite for a milestone year, Spice Market or Lord Jim's for the dinner, the Anantara Spa's couples' Royal Thai ritual, and the Sunday Brunch as the celebration anchor. The hotel handles every variant of the brief reflexively — three brand-eras of grand-hotel muscle memory mean the choreography is calibrated rather than improvised.

Family Holiday

The Anantara is the most operationally smooth Bangkok family-stay option of the central-city set — connecting Premier Rooms, the Royal Bangkok Sports Club's Junior membership for visiting families, the 25-metre lap pool with the dedicated children's section, the Anantara Adventure Club kids' programme, and the direct walk to Siam Paragon's basement Sea Life aquarium and the Erawan Shrine cluster.

Business

For Bangkok corporate stays at the level where the Rajadamri/Lumpini Park address matters more than the river-view register, Anantara Siam is the answer. Madison at lunch is the city's most reliable working steakhouse; the property's six event rooms and the Royal Ballroom have the largest pillar-free conference floor in central Bangkok; the Anantara Club lounge on the seventh floor is the calibrated executive option.

Practical Information

Address

155 Rajadamri Road
Lumpini, Pathumwan
Bangkok 10330, Thailand
BTS Ratchadamri 6 minutes; CentralWorld 2 minutes; Siam Paragon 4 minutes; Suvarnabhumi International 35 minutes by car

Rooms & Rates

354 rooms incl. 35 suites
Premier Room from THB 7,000/night
Premier Junior Suite from THB 12,000/night
Anantara Suite from THB 22,000/night
Bencharong Suite from THB 75,000/night

Check-in / Check-out

Check-in: 3:00 PM
Check-out: 12:00 PM
Opened March 1983 as Regent Bangkok
Four Seasons 2002–2015
Anantara Siam since 1 November 2015

Key Features

Spice Market (original 1983 Thai-market restaurant)
Madison steakhouse + Lord Jim's seafood
Biscotti contemporary Italian
Sunday Brunch — Bangkok's most-decorated
Paiboon Suwannakudt silk murals (1983 originals)
1,000 sqm Anantara Spa + 25m lap pool

Book Anantara Siam Bangkok

From THB 7,000/night. Bencharong Suites and Sunday Brunch tables for groups of six or more book three to four months out for high season (November–February); Premier Rooms remain flexible at 4–6 weeks ahead.

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