Green One UN House

304 Kim Ma, Ba Dinh, Ha Noi

General Information


  • Rating System: LOTUS NR V2.0
  • Building type: Office building
  • Size (GFA): 7,353 m2
  • Owner: United Nation Development Programs (UNDP)
  • LOTUS AP: GHD / Green Consult Asia
  • Engineering: ENGCORP, Ecoba
  • Website:
The Green One UN House in Hanoi is the first of 16 pilot projects around the world that gather multiple UN agencies in a single building to encourage collaboration.
The project involved gutting and refurbishing of an existing apartment building besides constructing over an additional area of 2,500m2. A lobby on the ground floor welcomes visitors to a conference center with a 200-person capacity theatre and formal meeting spaces. A cafe space creates a dynamic hub for staff and clients to interact. It also includes a travel agency, a bank, and a learning and research facility.
An extensive stakeholder consultation and a rigorous design review process were performed to ensure that UN staff participate and have a share of ownership over the project.
After following LOTUS NR Pilot version and achieving Gold Certification (the highest rating in Pilot version) at Provisional Certification stage, the project decided to target Full Certification under LOTUS NR V2.0. In May 2017, the building successfully achieved Platinum Certification.
Sustainable features of the building include extensive use of green roofs, drought tolerant landscaping, low water use fittings, energy efficient lighting and air conditioning, reuse of the structure of an old building, use of low-VOC products and installation of photo-voltaic panels that supply around 12% of the building total energy demand.

LOTUS Scorecard

Total Point: 84/110
LOTUS Platinum

ENERGY: 19/31

Improve and monitor the energy consumption of a building through proper insulation, the use of natural ventilation and the installation of energy efficient equipment

WATER: 7/13

Reduce water consumption of a building through the use of water efficient fixtures, rainwater harvesting and water reuse & recycling


Reduce the use of high embodied energy materials; Maximize the use of reused & recycled materials; Encourage a wider use of prefabricated components


Protect the building environment and the ecology of the surrounding area; Assure the preservation of topsoil together with the maximization of biodiversity


Promote the reduction of waste during the construction and operation of the building, as well as encourage extensive recycling practices


Ensure a proper indoor environmental quality through maximizing daylight and open views and the optimization of the indoor air quality


Ensure that all necessary adaptation and mitigation components are integrated at the design stage of a building and to reduce the impact on the environment in terms of GHG emissions


Promote social integration of the building within its neighborhood through public consultation, respect for cultural heritage and to facilitate access for people with disabilities


Ensure that all targets set up for the various stages are competently and effectively managed throughout the project

INNOVATION: 8 points

Innovative techniques/initiatives as well as exceptional performance enhancement

Green Features

  • Energy use reduction: 28.8% 28.8%
  • Total roof area is green roof: 35% 35%
  • Reduction of water use through fixtures: 44% 44%
  • Roof & paved area limits heat island effect: 77% 77%
  • Existing structure reused: 94% 94%

Solar panels generate an average of

"The sustainability of our societies around the world has always been and remains the central mission of the United Nations. This has been very clear from our founding over 70 years ago. It is stated in the UN charter and most recently in the Agenda 2030 which embodies the UN’s Sustainable Development Goals. By presenting the UN in Viet Nam with this award today, you recognize the unique role that the United Nations can and must also play in championing the leadership in Green Building design around the world."

– Mr. Kamal Malhotra, UN Resident Coordinator and UNDP Resident Representative in Viet Nam