Top Knot Rooftop Bar & Restaurant

Savor an array of sumptuous menus recommended by our Chef, along with this unrivaled rooftop view of the panoramic Chao Praya River running roughly in parallel with the enticing city view of Bangkok. Stunning sights, which await you right at the edge of the spacious balcony, are one of the definitive to-dos at Once. A truly distinctive space that offers much more; with a great versatility for a set-up of all spectacular and memorable events, especially for couples thinking about tying the knot.

Visit Restaurant

Wedding bouquet

Being Engaged

Rooftop wedding venue is the perfect setting for your memorable wedding day. Hotel Once Bangkok offers elegant packages for wedding ceremony and celebrations.

Wedding Facilities

Wedding Package   |   Contact Sales Event

Time Capsule_2 - Hotel Lounge

Time-Capsule Lounge

This area invites you to write a personal note to your future self, seal it and leave it to be disclosed in a future moment. Just imagine writing a letter to your future self, then opening it at that exact moment ahead in the future to read the message from the past you’ve left to yourself. It serves as functional or poetic or just-for-a-laugh note-to-thyself, to remind you of little something that can be valuable to yourself. Leave it to Once to be your time-turner; we will mail the letter to you all in a timely manner!


New Crafted In-room Amenities by ERB

After a year of presenting its unique design with exceptional services, Hotel Once Bangkok has decided to upgrade its in-room amenities to another level, serving beyond ordinary by offering an exclusive experience for guests to enjoy spa-like bathing amenities and to get along with the culture.

The new in-room toiletries are exclusively developed by Erb who has been known as a bespoke perfume developer and leading Thai herbal skincare. It is a high-end skincare that will give you a blissful sensory experience to rejuvenate your body and mind. Erb harnesses the power of herbal remedies using latest scientific innovation, resulting in products that deliver exceptional benefits as well as induce a delightful sensorial experience. Erb’s ingredients sourced from only the most meticulously grown authentic Thai herbs. Each ingredient is uniquely selected to create Erb’s unique signature blends filled with exquisite benefits for you to indulge in.

Indeed, the occasion is to well emphasize the identity of Hotel Once Bangkok as the only romantic boutique destination in the area. With the philosophy in common to recognize the important of sustainability development, this collaboration will deliver further products and services that are carefully developed to reflect genuine Thai healing, sensuous relaxation and are effective for complete body and soul revival at Hotel Once Bangkok in the near future.

Hotel Reception


The reception offers an extensive range of business services. As sociable epicenter of this living space, guests can sit back, chill out, enjoy, share, write and read, chat or laugh…We are pleased to serve you with a welcome drink, free newspapers and magazines, free WIFI. And well, anything you wish really!


Green Wall

The natural beauty of green wall sets you right to a relaxing mood at a very first glimpse when you arrive at the hotel. Wall and wall of lush garden are intricately designed to enhance the space and create a soothing atmosphere throughout your pleasant stay at ONCE.


Shuttle Boat Service

Our shuttle boat transports guests between Ramada Plaza Bangkok Menam Riverside Hotel and Saphan Taksin BTS station (Taksin/Sathorn Pier) with complimentary service. Regular and frequent service available seven-days-a-week, it’s the perfect way to explore the old town during your journey. The journey each way takes about 8 minutes and is available every 30 minutes from 7.00 am to 11.00 pm. The shuttle boat are easily recognisable with the Ramada Plaza Bangkok Menam Riverside logo.