33649 Bielefeld-Quelle: 96 units, architect: Hans-Friedrich Bültmann. Special features: all buildings are equipped with composting toilets and in the settlement there is the highest composting toilet in Europe on the 5th floor. Further water measures: rainwater infiltration, own drinking water source; a reed sewage treatment plant was planned but could not be realised. Energy: BHKW with local heating network. Social: day nursery, cooperative project. Economy: Development as a large plot, inexpensive construction with a lot of own work. Construction time: 1997
| Street | Forest spring path 16 |
| Building type(s) | Single-family and semi-detached houses; cooperative buildings with 5 storeys as new buildings |
| Form of ownership | Individual property (WEG) and a housing cooperative |
| Location (project) | Village structured outskirts |
| Size (WE) | 96 thereof 17 as cooperative In planning originally 130 WE were considered |
| Completion | 1997 |
| Ecology | |
| Waste/water | A closed circuit for water and waste water should be created. All buildings are equipped with composting toilets that save water. In the settlement there is the highest composting toilet in Europe. It is realized on the 5th floor. Further measures on the subject of water: rainwater infiltration, own drinking water source; a reed sewage treatment plant was planned but could not be realised. A plant-based purification system was to clean the grey water. However, it was not approved. |
| Waste | Composting Toilets |
| Energy | Own energy generation and supply via local heating network and natural gas CHP unit |
| Building Biology | Selection of building materials largely in accordance with ecological building criteria |
| Outdoor facilities | Rainwater drainage into ditches, infiltration |
| Economics | Approx. 1,100 Euro/sqm Development as a large plot, inexpensive construction with in part a lot of self-help. The proportion of self-help was quite high |
| Socio-cultural | KiTa in the settlement, cooperative project Extensive participation procedure The residents have joined together to form the "Ökologische Baugruppe Waldquelle ÖBW". The Ökologische Wohnungsbaugenossenschaft is a member of the WEG as a legal entity, embedded in the ecological neighbourhood concept. A planned craftsmen's yard was not implemented |
WDR documentary (2020) about the Waldquelle eco-settlement
In the documentary, a 5-minute sequence reports on the Waldquelle ecological settlement in Bielefeld. Ute Möller, one of the founders, leads through the ecological settlement and tells about the experiences and developments in the now almost 25 year old settlement with lots of wood, greenery and solar cells on the roof.
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| Contact | Architect: Hans-Friedrich Bültmann, Bielefeld |
| Links | Impressions from the eco-settlement (1998) www.heimatverein-quelle.de/images/deunkens/erinnerung/2018/06/19980604-nw.pdf Sanitary concept with detailed description of the composting toilets (2004) with some SW photos www.ecosan.eu/...sanitaetskonzepte-ohne-wasser-im-mehrgeschossigen-wohnbau-1.pdf |
| Sources | Bauministerium NRW (2011): Neues Wohnen mit Nachbarschaft. 2nd edition. Düsseldorf, p.58/59 Kennedy, Margrit (1998): Handbuch ökologischer Siedlungs(um)bau. Berlin, p.78-80 LB des Landes NRW (1996): Zukunftweisender Wohnungsbau in NRW. Aachen Ökologische Baugruppe Waldquelle: Project description Ökologische Baugruppe Waldquelle. Bielefeld 10/1993 |
Last Updated: December 8, 2020
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All project/s of the planning office: Hans-Friedrich Bültmann; Urban region: Bielefeld and surrounding area; Country: Germany; Characteristics: 01 - 02 Floors, 05 - 6 floors, Semi-detached house, Condominiums, Single-family house, Cooperative, Multi-storey housing, Eco-settlement; typology: Settlement; Thematic: CHP, Own contribution, composting or separation toilets, Local heating, Rainwater infiltration
