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Siam Patumwan House, an office building developed by Siam Motors—which has maintained partnerships with Japanese companies for over 70 years—was constructed by SMCC (Thailand), the Thai subsidiary of Sumitomo Mitsui Construction. True to the meticulous standards of Japanese companies, every detail has been carefully considered, and the moment you step inside, you are greeted with an atmosphere of dignified elegance throughout the entire building.
This Grade A office building has been awarded LEED Gold, Fitwel, WiredScore, and SmartScore certifications, promoting sustainability in line with international ESG standards. It is also distinguished as a smart building, featuring advanced connectivity such as Wi-Fi 6 and fiber-optic networks.
We are pleased to introduce you to Siam Patumwan House!
This office building is located in the Siam area, the heart of Bangkok, and is easily accessible within just 5 minutes via the skywalk directly connected to BTS National Stadium Station.
Many Japanese companies, including Hitachi Elevator, Yamaha, Daikin, and SMCC, have already established their showrooms and headquarters offices here, with their products installed throughout the building.
・Construction by SMCC
・Elevators and escalators by Hitachi
・Audio/Visual (A/V) systems by Yamaha
・Air conditioning system (VRV) by Daikin
Situated in the center of the Siam district and adjacent to the Bangkok Art and Culture Centre (BACC), the building offers a calm and serene atmosphere despite its prime downtown location. At the same time, it is surrounded by vibrant shopping malls such as Siam Discovery and MBK Center.
The area is a popular destination for tourists and is home to numerous luxury restaurants and hotels, making it highly convenient for business travelers and corporate entertaining.
The skywalk connects directly to BACC, Siam Discovery Center, MBK, and National Stadium. While the surrounding neighborhood is vibrant with shopping, dining, and sports facilities, providing a perfect balance of convenience and urban energy.
Let’s see how to access the building from BTS National Stadium Station with photos!
From Exit Gate 3 of BTS National Stadium Station, proceed along the skywalk, and you will find a connecting passage that leads directly to the building located on the opposite side of MBK Center.
This passage connects directly to the 2nd floor of Siam Patumwan House and takes about 5 minutes from the station. With no stairs to climb, access is smooth and convenient.
Although BTS Siam Station is roughly the same distance in a straight line, but the need to cross roads and climb stairs makes it less convenient. Therefore, using BTS National Stadium Station is the most practical option!
This is a Grade A office building that has obtained four certifications: LEED Gold, Fitwel 1 Star, WiredScore Platinum, and SmartScore Gold. These international standards reflecting its high-quality standards. Following the acquisition of WiredScore and SmartScore certifications, interest from technology-related companies has been steadily increasing.
Designed with inspiration from the traditional Japanese “lattice” motif, the lobby of this building immediately exudes a dignified and elegant atmosphere. Its wooden design elements provide a sense of luxury while maintaining warmth and approachability.
Access Control: The building features destination-controlled elevators, allowing access only to designated floors for enhanced security and convenience.
Authentication System: Advanced face recognition, smart card readers, electromagnetic locks, and surveillance camera systems powered by Hitachi’s Smart Building Platform.
Thermal Scan: Thermal scanning cameras installed at the main entrance as a COVID-19 countermeasure.
Office floors located from the 8th-32nd floors, divided into two zones:
・Low Zone: 8th – 19th floors
・High Zone: 20th – 32nd floors
The building is equipped with dedicated elevators for each zone: with 8 elevators serving the low zone and 8 elevators serving the high zone, totaling 16 elevators. This ample capacity ensures minimal waiting times for tenants and visitors.
The units are available in a variety of sizes and feature efficient designs. Unlike some buildings, where irregular layouts may result in obstructive columns or wasted space, these units are thoughtfully planned to maximize usability and functionality.
The office areas feature a generous ceiling height of 3 meters, creating a spacious and open environment without any sense of crowding. Large windows allow abundant natural light, providing a comfortable and well-illuminated working atmosphere.
◦ Daikin VRV system
◦ Air filters to prevent dust and chemical substances, ensuring indoor air quality
◦ CO2 sensors for monitoring ventilation and fresh air supply
◦ Use of low-emission materials and exhaust systems to control chemicals and pollutants
◦ LED lighting, motion sensors, and insulated glass with low-emission coating
◦ Daylight and occupancy sensor-based lighting control system
◦ Pantry and restroom lighting controlled by motion sensors
Although situated in the heart of Siam, the building is remarkably surrounded by few high-rise buildings, offering a 360-degree panoramic view of Bangkok. Sunlight penetration is excellent, ensuring bright and well-lit interiors.
As the view varies depending on the floor, it is an important aspect to consider during inspections.
The 11th floor is designed for hosting meetings and parties with external guests, offering an overall luxurious and prestigious atmosphere. Inspired by Japanese design, this facility provides a refined space suitable for corporate events.
The Sky Garden Bar offer food and beverage service for events and parties. Scheduled to open in February 2025.
◦ Large conference hall with a maximum capacity of 250 people (can be divided into two rooms)
◦ Available for both tenants and external users (tenants receive special discount)
◦ Fully equipped with free Wi-Fi, LED screen with stage, standard audio system, parking, drinking water, and catering services
◦ Spacious and ideal for large-scale events, press conferences, and seminars etc.
◦ Small meeting pods: 3 rooms available, each accommodating up to 6 seats; ideal for team discussions or private meetings
◦ Boardrooms: 3 rooms available, each with a maximum capacity of 20 seats; suitable for executive meetings and larger group discussions
There are also two screening rooms that can accommodate around 25 people each. Equipped with high-quality YAMAHA audio systems, these rooms are ideal for showing training videos or hosting presentations.
The 6th floor features a spacious cafeteria with eight restaurants in operation, allowing tenants to enjoy lunch without having to go outside. Coffee shops are also available, providing a convenient space for breaks during work hours.
The restrooms are as clean and comfortable as those found in hotels. There are also multipurpose restrooms, equipped with showers—perfect for freshening up after sweating, a thoughtful feature for Thailand’s tropical climate.
The photo shows a pantry room of a company occupying an entire floor. With the whole floor at their disposal, there are extensive customization options, allowing for large spaces to be arranged for employee dining.
The smoking area is accessible from the 1st floor outdoor space. Inspired by Siam Motors’ “Think Earth” concept, this green space is also open to the public and serves as a relaxing area for stress relief.
A Lawson convenience store is located on the 1st floor, and a café is on the 2nd floor, allowing tenants and visitors to conveniently purchase light meals and drinks without leaving the building.
• 719 parking lots plus 16 EV charging stations available
• Additional parking space cost 3,000 baht per car per month.
That concludes our introduction to Siam Patumwan House!
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