Anantara Siam Bangkok has finished a US$50 million renovation of all 335 rooms, suites and villas, its Grand Ballroom and meeting rooms, its spa and its fitness facilities. The work ran in two phases from June 2025 to September 2026 while the hotel stayed open. Our Thailand team covers the hotel itself in its briefing on the Anantara Siam renovation. Here we use it as a case study in booking a group into any hotel that has just been renovated.
What Changed at the Hotel
- Rooms. All 335 rooms, suites and villas were redesigned, with new Garden Pool Suites and Villas and a two-bedroom Jim Thompson Explorer Suite.
- Events. The Grand Ballroom and the meeting rooms were refitted with new conference technology.
- Wellness. The spa was overhauled, and the sports club now has a gym, a Pilates studio, a Muay Thai ring and a climbing wall.
- Heritage. The hand-painted lobby mural and ceiling panels were kept.
Why a Renovated Hotel Needs Fresh Checks
A renovation changes the product you are selling. Room categories, room counts, meeting-room layouts and even outlet names can all be different from the fact sheet in your files. The published reports on this hotel do not give new ballroom capacities or room counts by category, which is common after a relaunch. So treat your old notes as out of date until the hotel confirms them in writing.
A Checklist for Any Renovated Hotel
- Ask for the current fact sheet. Old capacities and floor plans may no longer apply.
- Confirm the room mix. New suite and villa categories are often small in number, so check how many exist before you promise them to a group.
- Check for remaining works. Ask whether any area is still closed or being finished on your dates.
- Re-test the technology. New meeting-room equipment is a selling point, but ask for a technical walk-through before a conference.
- Inspect before you commit. A site visit shows what a press release cannot.
Frequently Asked Questions
What did the Anantara Siam Bangkok renovation cover?
All 335 rooms, suites and villas, the Grand Ballroom and meeting rooms, the spa and the fitness facilities, in a US$50 million project that ran from June 2025 to September 2026.
Has the ballroom capacity changed?
The published reports do not give updated capacities. Ask the hotel for its current floor plans before you quote a layout.
What should I check before booking a group into a renovated hotel?
The current fact sheet, the number of rooms in each new category, any areas still under work on your dates, and the meeting-room technology.
Where Explera Fits
We plan meetings and incentive programmes across our destinations: Thailand, Japan, Korea and New Zealand. Our ground teams run site inspections, venue checks and the programme around the meeting.
Write to b2b@expleradmc.com or message +66 93 656 8090 on WhatsApp. Explera Thailand holds TAT licence No. 14/05119. Explera DMC is IATA TIDS-registered (96215733) and an ASTA member (900408341).
