The Hansar

Click an image to view larger version.
Height: Occupied
149.3 m / 490 ft
Height: To Tip
173 m / 567 ft
Height: Architectural
173 m / 567 ft
The Hansar Outline
Floors Above Ground
# of Elevators
Top Elevator Speed
3.5 m/s
Tower GFA
46,167 m² / 496,937 ft²
# of Apartments
# of Hotel Rooms
# of Parking Spaces


Official Name The Hansar
Other Names Hansar Rajdamri, Ativa Hotel Bangkok
Structure Type Building
Status Completed
Country Thailand
City Bangkok
Street Address & Map 3 Rajdamri Road
Postal Code 10330
Building Function hotel / residential
Structural Material concrete
Proposed 2005
Construction Start 2006
Completion 2011
Official Website Hansar Rajdamri
Rankings Click arrows to view the next taller/shorter buildings
National Ranking #65 Tallest in Thailand
City Ranking #57 Tallest in Bangkok

Companies Involved

Owner Somhansar company Limited
Developer Ativa Hospitality Corp., Ltd.
Design WOHA Architects
Architect of Record Tandem Architects (2001)
Structural Engineer
Design Warnes Associates Company Limited
MEP Engineer
Design WSP Lincolne Scott
Project Manager EMS Consultants Company
Main Contractor Ritta Co. Ltd.
Material Supplier
• Elevator KONE

About The Hansar

The Hansar is located in the heart of Bangkok, surrounded by luxury hotels, shopping areas, and a large city park. The site is small and irregular, with a building plot ratio of 1:10. The design captures the value of the site by maximizing the building area. In Bangkok, living up high provides less noise, less dust, cooler breezes and privacy with full exposure to views. The small site limited the potential green areas on the ground level so sky gardens were introduced at height and are equal to 30% of the site area. These sky gardens are placed at every fifth floor, and are staggered across both the east and west elevations. Each unit has either a private lift lobby with an entry to the sky garden or a living room with sky garden views.

To negotiate between the desire for views and the need to provide shading, a metal mesh screen was utilized. These sun screens also serve as privacy screens for the units. The expanded mesh, which forms the building’s outer skin, is coated in a metallic bronze color to create a contrast to the usually grey Bangkok sky. The bronze screen, when combined with the sky gardens, gives a unique character to the development. The golden mesh and floating greenery allude to the glimpses of gilded temple and luxuriant gardens that hide amongst the concrete jungle of Bangkok.

Tropical living is all about the interaction between the interior and exterior, but in a dense urban site this is challenging. The design looked at ways of creating this tropical lifestyle in a high-density, high-rise development. Landscaping is incorporated in all the common areas throughout the building. Lower level units have private cantilevered gardens. These gardens create a rhythm of green elements which run vertically throughout the whole development. Sky gardens, sky pavilions and green walls have been created all the way up the building to increase the landscape area and interaction between interior and exterior. At the hotel, cantilevered sky pavilions project from the rooms. These are topped with sky gardens, which can be enjoyed by the nearby rooms. Internal light wells are planted with green walls, and give private garden views to every hotel room. The condominium apartments and hotel rooms are all accessed off naturally ventilated and naturally lit corridors, reducing the energy use of the building substantially.

At the podium the ground level consists of retail below six stories of above-ground parking (due to frequent flooding, underground parking is not a good option in Bangkok). Green creeper screens wrap around the car park podium, on top of which sits the cantilevered swimming pool.

CTBUH Initiatives

The Hansar Chosen as Featured Building
Feb 2012 – Featured Tall Building


Interview: Mun Summ Wong
18 Sep 2014 – Mun Summ Wong, WOHA Architects

Monthly Video: Five Minutes with Mun Summ Wong
18 Sep 2014 – Mun Summ Wong, WOHA Architects

Research Papers

Case Study: The Hansar, Bangkok
Jan 2012 – CTBUH Journal, 2012 Issue I

To submit more information or donate images for this project, please use our submission portal.