From Brownfield to Desirable Living

Cohousing group BioTope maps out circular lessons from construction project

Cohousing group BioTope, together with three partners, transformed the derelict Malmar factory next to the Bijgaarde Park in Ghent into a large collective housing project with 59 residential units and a neighborhood health center: the Bijgaardehof.

From the very start, it was a conscious choice to build according to the principles of the circular economy. To make that possible, we were closely involved as the client in the design and construction process. In doing so, we gained a wealth of experience, which we wanted to share to help guide other circular construction projects in the right direction.

We compiled all our lessons learned into nine detailed information sheets and four short videos. The three main themes are: how to deal with brownfield sites as terrain for a circular construction project, creating a smart building with material use optimization throughout the life cycle, and demonstrating circular innovative construction techniques.

With these sheets, we target other clients, the construction sector, and governments. The lessons are applicable to similar cohousing projects, but they are also relevant for other (collective) housing buildings and even for individual housing clients. We hope to inspire as many people as possible and provide them with practical tools to implement circular ideas in their construction projects.

BioTope

Partners Bogdan & Van Broeck architects, MilieuAdviesWinkel (servicepunt van Gents Milieufront)

Sectors

Themes

Organisations

MOST IMPORTANT
RESULTS

  1. We created nine sheets covering various circular aspects of our construction process, such as site access, fauna and flora, soil balance, accessibility, circular geothermal energy, circular water systems, and rainwater neutrality …
  2. We developed two demo projects: the implementation of three above-ground rainwater systems (one tap per floor), and the installation of extra measuring equipment to monitor heat and cooling input and output.
  3. We carried out a whole series of measurements that provided us with valuable information. We monitor water (rain and tap water), energy (e.g., heat pump), heat going in and out of the ground, and the heat demand of the residential units.
  4. In addition to the information sheets, we shared knowledge through other means: via tours and demo moments, four short videos about circular principles, informative articles on various websites, social media, newsletters …

MOST IMPORTANT
LESSONS LEARNED

  1. The lessons and recommendations from our construction adventure were documented per theme in the nine informative sheets.
  2. We did not succeed in creating a materials passport for the building. The main reasons were a lack of expertise among the involved architects and ambiguity about the use of a suitable tool. Instead, we focused on creating four short videos.
  3. When sharing knowledge, we noticed that contractors were hard to reach to participate in tours and knowledge exchange. Architects, on the other hand, showed a great deal of interest.
9 condensed sheets
4 short videos
3 above-ground water systems
1 circular heating and cooling system

WHAT DOES
THE FUTURE HOLD?

We commit to continuing to monitor the measurement results of the installed equipment. We will also continue to focus on the dissemination of our results and will organize at least one tour per year, with the possibility of additional tours upon request.