Green Lighthouse

Last modified by the author on 22/06/2015 - 09:17

New Construction

  • Building Type : Office building < 28m
  • Construction Year : 2009
  • Delivery year : 2009
  • Address 1 - street : 2200 KøBENHAVN N, Denmark
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 950 m2
  • Construction/refurbishment cost : 5 000 000 €
  • Number of Work station : 37 Work station
  • Cost/m2 : 5263.16 €/m2

Proposed by :

Certifications :

  • Primary energy need
    3 kWhpe/m2.year
    (Calculation method : Other )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

Green Lighthouse is Denmark’s first public carbon-neutral building. The building has been built in less than a year in a close public/private partnership.

Green Lighthouse is an energy-efficient building of great architectural merit, with a high influx of daylight. Inspired by the sundial and the movement of the sun around the building, Green Lighthouse plays on the sun as a source of energy and on its role in science. As sustainable as it is healthy, Green Lighthouse relies on district heating, solar cells, solar heating and cooling, seasonal storage and innovative architecture to create a gorgeous, CO2-neutral building.
The partners behind the building both from the public and the private sphere. They are the University of Copenhagen, VELUX, VELFAC, the Danish Building and Property Agency (UBST) and the City of Copenhagen.

See more details about this project



    Hellerup Byg



    Municipality of Copenhagen

    Anne Skovbro

    Strategic Partner


    University of Copenhagen

    Lykke Friis

    Strategic partner & Building Owner

Contracting method

Public Private Partnership

If you had to do it again?

We commissioned the first year into the turnkey contract, this was a good experience. For next projects, it should be commissioned for 3-5 years.

Building users opinion

Very good indoor climate, cf interviews made for "Green Buildings Pay" book written by Brian Edwards & Emanuele Naboni, ed. 3, Routledge

Energy consumption

  • 3,00 kWhpe/m2.year
  • 60,00 kWhpe/m2.year
  • Other

    14 heating;
    8 lighting;
    5 ventilation;
    3 hot water;
    27 production - solar thermal & PV

Envelope performance

  • 0,08 W.m-2.K-1
  • prefabricated; thermoactive slabs ground and first floor

  • 0,60
  • EN 13829 - n50 » (en 1/h-1)

  • 0,74
  •  report from COWI consultants

Real final energy consumption

    44,00 kWhfe/m2.year

    2 010


    • Urban network
    • Heat pump
    • Others
    • Solar thermal
    • Urban network
    • Heat pump
    • Solar Thermal
    • Solar cooling
    • Natural ventilation
    • Double flow heat exchanger
     WindowMaster control system
    • Solar photovoltaic
    • Solar Thermal
    • Energy recovery from waste
  • 90,00 %
  •  district heating in CPH is partly carbon-neutral

    heat pump from Sorttech, fluid/fluid, connected to the grid, and to a seasonal storage

    heat pump COP 1,6 on district heating

Smart Building

    Window Master system combined with BMS classic

    Easy and adaptive - works from every work station

Urban environment

    High density, inner urban Copenhagen

  • 1 000,00 m2
  • 20,00 %


    Heat pump and seasonal storage and district heating in combination

    heat pump designed for solar cooling, used reverse; taking in hot water from the roof - solar thermal, by use of seasonal storage from summer to winter, and then adding the district heating.

    worked well - only few problems with vacuum

Construction and exploitation costs

  • 50 000
  • 5 000 000

Energy bill

  • 2 000,00

Indoor Air quality

    Based on the relative comfort principle, according to EN 15 251. User is connected to outdoors visually, and also in terms of comfort. During winter, the IAQ is stable based on mechanical ventilation and heat exchange, during summer the users enjoy natural ventilation, combined with night cooling.


    The architectural concept of the house is the sun dial; the house follows the sun, also by its window design, where the facade windows and exterior sunscreening follow the path of the sun. The users can follow the seasons changing, and adapt the indoor climate individually. The house is flooded with daylight on all floors, and there is a "cathedral effect" through the central atrium, where users benefit from a 2500+ lux experience, to benefit their well-being and productivity.

    700 ppm

    650 ppm in average

    Class 2 in EN 15251

GHG emissions

Building candidate in the category

Health & Comfort

Health & Comfort

Green Building Solutions Awards 2015

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Author of the page

Ida Bjørn-Mortensen

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Green Building Solutions Awards 2015