Anyone researching Anantara Siam Bangkok Hotel needs three answers: where it sits, what it offers, and whether the room figures online can be trusted. The official June 2026 factsheet lists 335 rooms and suites, while KAYAK and several other listings give 354. This review keeps verified facts apart from conflicting claims and marks where the evidence runs out, so you can weigh the property before checking live rates.
Last checked: 2026-11-01
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Location area: Ratchadamri area, Pathum Wan District, central Bangkok · Nearest transit: Steps from BTS, per the property overview listing · Room count (listing A): 335 rooms and suites · Room count (listing B): 354 rooms and suites across nine floors
Snapshot at a glance
- Address 155 Rajadamri Road, Bangkok 10330, in central Bangkok; Erawan Shrine is about a five-minute walk (Anantara)
- Near the BTS Skytrain, Erawan Shrine and CentralWorld (Oyster.com)
- 335 rooms and suites on the official property page (Anantara); third-party counts differ, see below
- Opened in 1982 as a Peninsula hotel; became Anantara’s flagship in 2015 (Condé Nast Traveler)
How we researched this
Last checked: 2026-11-01.
Sources reviewed: official property website and June 2026 factsheet, official Anantara pages in English and Korean, Condé Nast Traveler and Oyster.com editorial reviews, a Five Star Alliance listing, and booking-platform listings from Agoda, KAYAK, Expedia and Trip.com.
We did not visit the property, interview staff, check live rates or availability, independently verify the room-count gap, or confirm ownership.
The numbers that matter
- Erawan Shrine: about five minutes on foot, per the official leisure page.
- Room count: 335 in official materials, 354 across a group of third-party listings, a 19-room gap that no source in our research explains.
- Floors: nine, per Condé Nast Traveler’s description of the property.
- Restaurants and bars: sources report between four and eleven outlets, with no authoritative tie-breaker.
Why this matters: the room count is the sharpest conflict in the evidence, and it affects how much weight you give every other figure here.
Key facts
| Attribute | Detail |
|---|---|
| Location area | Ratchadamri (Rajadamri) Road, central Bangkok |
| Address | 155 Rajadamri Road, Bangkok 10330, Thailand |
| Nearest transit | BTS Skytrain station, a short walk away |
| Room count (official) | 335 rooms and suites |
| Room count (third-party) | 354 rooms and suites, cited by Agoda, KAYAK, Expedia, Trip.com and Five Star Alliance |
| Building layout | Nine floors, per Condé Nast Traveler |
| Original build | 1982, as a Peninsula hotel |
| Anantara flagship | Since 2015 |
What to watch: the only conflicting hard figure in the table is the room count, so confirm it with the hotel if room numbers matter to your booking.
Specifications
| Feature | What the sources say |
|---|---|
| Restaurants and bars | Four to eleven, depending on the source and whether lounges are counted |
| Pool | 25-metre outdoor pool (KAYAK; Five Star Alliance) |
| Spa | Thai and Western therapies, including Restore & Renew, a full-body massage with Shirodhara (official spa page); seven treatment rooms (Condé Nast Traveler) |
| Fitness | Siam Sport Club with Technogym equipment (official spa page); 24-hour fitness centre (KAYAK) |
| Suites and rooms | Royal Suite, 126 sqm, with a corner view over the Royal Bangkok Sports Club; Deluxe Room, 42 sqm (official room pages) |
| Meetings | Grand Ballroom, 832.5 sqm, 700 theatre-style; 12 meeting rooms (official meetings page) |
What to watch: the restaurant count is the least settled figure in the evidence, so treat any single number with caution.
Is Siam a good area in Bangkok?
Ratchadamri Road and central character
The hotel sits on Ratchadamri Road, which the official address spells Rajadamri Road, in central Bangkok. The official site says some rooms overlook the Royal Bangkok Sports Club golf course.
Landmark and shopping access
The official leisure page puts Erawan Shrine about five minutes away on foot. Walking times to CentralWorld vary by source: the listings we reviewed range from roughly 2 to 10 minutes, and our research does not settle which figure is right.
Note: Walking times depend on the route and the source, so treat the 2 to 10 minute range as a spread rather than a measurement.
What this means: the hotel is central and the main landmarks are close, but the walk to the mall is the figure to check on a map before you book.
Location and getting there
The official leisure page gives the address as 155 Rajadamri Road, Bangkok 10330, and says the Skytrain station is a short walk from the hotel. Oyster.com places the property near BTS Skytrain, Erawan Shrine and CentralWorld.
Our research does not name the closest BTS station or exit, so check the walking route on a map before you travel.
The implication: for BTS-led travel the location works on paper, and the exact walking route is the detail to verify.
Anantara Siam Bangkok Hotel reviews
Guest scores are high across the platforms we checked, though the numbers differ. The official site shows 4.7 from 5,695 reviews, Agoda shows 8.9 from 4,451, and Trip.com reports 9.0 from 353 verified reviews.
Renovation and room layout
The official English page says the Grand Ballroom, flexible meeting rooms and 17 breakout rooms were renovated in 2026. Guest reports on room-level work are less settled: Expedia and Agoda guests describe ongoing renovation, paint odour and room noise, and some say work continued after the hotel said it was complete.
Five Star Alliance describes 354 executive-sized rooms, including 35 suites and seven garden cabanas. The official Royal Suite is 126 sqm and the Deluxe Room is 42 sqm.
Warning: The renovation reports are guest accounts, not a published renovation schedule. Ask the hotel which rooms are finished before you book.
Dining, pool and spa features
Restaurant counts differ by source:
- Expedia lists six on-site restaurants, Trip.com lists four, and Oyster.com lists eleven eateries and bars, including Biscotti, Shintaro, Madison and Spice Market.
- KAYAK and Five Star Alliance both report a 25-metre outdoor pool.
Trip.com notes a recurring complaint about dampness and musty odours in guest reviews.
The catch: the ratings are strong, but the complaints cluster around renovation, odour and noise, so ask for a finished room when you book.
Anantara Siam Bangkok Hotel price
Qualitative price positioning
Our research contains no published room rates, so this review does not state a price band. The listings we checked show ratings and room counts, not nightly figures, and we did not check live availability.
The property’s facilities, including a 126 sqm Royal Suite and a ballroom seating 700 theatre-style, describe a large full-service hotel. The evidence does not translate that into a specific rate.
What changes the rate
Room type, travel dates and what is included in the rate are the variables a reader can control when comparing live prices.
Tip: Compare the same room type on the same dates across the hotel’s own booking page and one third-party listing before you decide.
The trade-off: the hotel’s facilities point to a full-service stay, and the rate has to be judged against those facilities on the dates you plan to travel.
What is considered the best hotel in Bangkok?
Our research does not establish a single best hotel in Bangkok, so this section places Anantara Siam within the luxury field rather than ranking it.
Where Anantara Siam fits among Bangkok luxury options
The Five Star Alliance listing places the hotel among its Bangkok luxury properties. Guest scores are high on the three platforms we checked: 4.7 on the official site, 8.9 on Agoda and 9.0 on Trip.com, where location scored 9.3.
Siam Kempinski as a reference point
Search results list Siam Kempinski Hotel Bangkok as a related name. Our sources contain nothing about that property, so no comparison is possible here.
The bottom line: by the sources we checked, Anantara Siam is a luxury option in central Bangkok, but the evidence does not rank it against its peers.
Pros and cons
Strengths
- Central Ratchadamri Road address, with Erawan Shrine about five minutes on foot.
- An official spa with Thai and Western therapies and Technogym fitness equipment.
- High guest scores across the platforms checked.
- Large meeting space, including the 832.5 sqm Grand Ballroom.
Trade-offs
- The room count conflict (335 official against 354 third-party) has no tie-breaker.
- Guests on Expedia and Agoda report renovation work, paint odour and noise.
- Oyster.com notes a Wi-Fi fee, which conflicts with free Wi-Fi claims elsewhere, and calls the on-site dining expensive.
The pattern: the strengths are physical and checkable, while the trade-offs cluster around the rooms and the fees.
Best for: which guests this suits
- Families: the outdoor pool and 24-hour fitness centre are listed, but the research contains no family-specific policy, so ask about child rates and cots.
- Spa-focused travellers: the Restore & Renew ritual and seven treatment rooms, per Condé Nast Traveler.
- Dining-focused travellers: Condé Nast Traveler calls the Sunday Brunch among the best in town and names Madison, Spice Market and Shintaro.
- Pet owners: the research contains no pet policy, so confirm with the hotel before booking.
The implication: the evidence is strongest for spa and dining stays and thinnest for pet owners.
Alternatives in the set
- Siam Kempinski Hotel Bangkok: named in related searches; details to be confirmed from its own property site.
- Anantara Riverside Bangkok: a separate property from this hotel; details to be confirmed from its own property site.
What to watch: both alternatives need their own sources before a fair comparison, and this review does not rank them.
Our pick
Our pick is Anantara Siam Bangkok Hotel for families who want central access, for spa-focused guests, and for visitors who prioritise BTS and shopping access. The official room count, the spa offer and the guest scores fit those needs. Confirm the room count and the renovation status of your specific room before you book.
“Anantara Siam Bangkok stands at the top rank of all the establishments we have stayed in.”
— Guest reviewer (Anantara official review excerpt), guest
“Breakfast is one of the best in Bangkok.”
— Guest reviewer (Anantara official review excerpt), guest
Related reading: Metadee Concept Hotel Phuket Review · EAST Hong Kong Hotel Review: MTR Access, Pool, Dining
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Frequently asked questions
How many rooms does Anantara Siam Bangkok Hotel have?
Anantara’s official site lists 335 rooms and suites. Five third-party listings, including KAYAK and Five Star Alliance, cite 354, a 19-room gap our research does not explain.
How far is Anantara Siam Bangkok Hotel from Erawan Shrine?
The official leisure page puts Erawan Shrine about five minutes away on foot.
Is Anantara Siam Bangkok Hotel family-friendly?
The research lists a 25-metre outdoor pool (KAYAK, Five Star Alliance) and a 24-hour fitness centre (KAYAK). It contains no family-specific policy, such as a kids’ club or child rates.
What spa features does Anantara Siam Bangkok Hotel offer?
The official spa page lists Thai and Western therapies, including Restore & Renew, a full-body massage with Shirodhara, and Siam Sport Club with Technogym equipment. Condé Nast Traveler reports seven treatment rooms and the VIVID IV Drip Bar.
Is Anantara Riverside Bangkok the same property as Anantara Siam Bangkok Hotel?
No. Anantara Riverside Bangkok is a separate property. Anantara Siam Bangkok Hotel is at 155 Rajadamri Road, Bangkok 10330.