Student Residence 42! The answer to all questions

  • Building Type : Student residence
  • Construction Year : 2017
  • Delivery year : 2017
  • Address 1 - street : 53115 BONN, Deutschland
  • Climate zone : [Dwa] Humid Continental Hot Summer, severe, dry winter

  • Net Floor Area : 1 215 m2
  • Construction/refurbishment cost : 2 630 000 €
  • Cost/m2 : 2164.61 €/m2

Proposed by :

Certifications :

  • Primary energy need :
    14.4 kWhpe/m2.year
    (Calculation method : DIN V 18599 )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building
​A lighthouse project of ecological construction, centrally located in Bonn.With a construction that combines ecology and economy, the innovative project demonstrates that timber construction can be the answer to the question of how to reconcile sustainability and future viability in multi-storey housing construction.In addition to the maximum use of wood from the supporting structure to the façade to the interior, this building was completely insulated with cellulose. For the first time in a building of its kind and size. Even the fire walls were made of wood.Large rooms, sun, fresh air, bright rooms, high quality of stay with low primary energy use. Classic investor models were interpreted quite differently here: a partnership approach between investor and architect. All approaches were questioned and optimized for sustainability.The building achieves a plus energy standard (based on the passive house construction method). Through an innovative building automation, all energy services are controlled and thus the own electricity consumption is maximized.An unbelievable living comfort is achieved while at the same time minimizing primary and final energy costs.

See more details about this project

Data reliability

3rd part certified


Contracting method

Lump-sum turnkey

Owner approach of sustainability

The post-war house on the inner city plot was dilapidated. The aim was to create a sustainable student accommodation, which benefits investors, users and the environment.

Architectural description

Wood as a building material should find maximum use. Large rooms, sun, fresh air, bright rooms, high quality of stay with low primary energy use. Classic investor models were interpreted quite differently here: a partnership approach between investor and architects. All approaches were scrutinized and optimized for sustainability.

 Die Architekten haben den nachhaltigen Ansatz in vielen Details auf die Spitze getrieben Beispielsweise die Kellerdaemmung ebenfalls in Zellulose ausgefhrt....

If you had to do it again?

Would we go the way even more consistently and make even fewer compromises.

Building users opinion

The residents are consistently involved in the residential principle. You should learn sustainability! We are currently harvesting lettuce and vegetables from our own garden. The students have very quickly appreciated the difference in comfort. The high quality of living speaks around and the demand is very high!

Energy consumption

  • 14,40 kWhpe/m2.year
  • 38,00 kWhpe/m2.year
  • DIN V 18599

  • 8,02 kWhfe/m2.year
  • Heating: 3200 kWh / a absolutely, covered by photovoltaic = 100kWh / a per apartment.

Envelope performance

  • 0,10 W.m-2.K-1
  • Wood construction with cellulose insulated

  • 0,23
  • EN 13829 - n50 » (en 1/h-1)


    • Heat pump
    • Other hot water system
    • Radiant ceiling
    • Double flow heat exchanger
    • Solar photovoltaic
    • Heat Pump on geothermal probes
    • Heat pump
  • 80,00 %
  •  PV deckt Bedarf an Heizung und WW sowie Teile des Nutzerstroms

Water management

    Toilet flushing over rainwater

Indoor Air quality

    VOC Sensoren




    Highly specialized sol-silicate facade paint with photocatalytic effect.


    Acabados / Pinturas, murales, revestimientos de paredes

    Highly specialized sol-silicate facade paint with photocatalytic action. Photocatalytically active, reduces harmful gases (eg NOx, VOC's) and organic contaminants.



    Obras estructurales / Sistema pasivo

    First building of its kind completely insulated with cellulose!

Construction and exploitation costs

  • 80 000,00
  • 3 260 000

Urban environment

City center, building, central, short distances to the university

Land plot area

540,00 m2

Built-up area

260,00 %

Green space


Parking spaces


Building Environmental Quality

  • indoor air quality and health
  • acoustics
  • comfort (visual, olfactive, thermal)
  • waste management (related to activity)
  • water management
  • energy efficiency
  • renewable energies
  • maintenance
  • building end of life management
  • building process
  • products and materials

Building candidate in the category

Energie & gemäßigtes Klima

Energie & gemäßigtes Klima

Low Carbon

Low Carbon

Smart Building

Smart Building

Abstimmung der Internet-Benutzer

Abstimmung der Internet-Benutzer

Großer Preis - Nachhaltiges Bauen

Großer Preis - Nachhaltiges Bauen

Green Solutions Awards 2017 - Gebäude

Author of the page

  • Kay Künzel


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    Green Solutions Awards 2017 - Gebäude