Situated at 399 Sukhumvit Road in Bangkok, Interchange 21 is a Grade A building with 36 floors. It offers convenient parking in the building (paid) as well as accessible facilities for those with disabilities. Upon entering the foyer, guests are welcomed by a concierge and they can also enjoy a cafe and business lounge. The workspace further provides reception services, printing facilities, and a meeting room/boardroom that can be rented out for special occasions. For cyclists, there is a bike rack along with shower facilities for convenience. In addition to this, administration support, telephone answering, and storage facilities are available to make work life more comfortable. The 24/7 access allows people working longer or more flexible hours to easily enter the premises. For those who require internet connection for work purposes, fiber broadband is offered. This along with air-conditioning, building security, and lift/elevator access ensures safety and comfortability within the building.