Decision Model for Public-Private Instruments

Decision Model for Public-Private Instruments (2018 – 2019)


How can municipalities and water authorities ensure climate adaptive measures by owners of private assets as part of local regeneration projects, urban transformation and change projects across the city? Currently, they can draw on experiences in pilots and projects, but as yet there is no overview of the lessons learned and focus points.

NextGreen is interviewing Amsterdam experts about their experiences, the lessons learned and the upscaling potential of instruments such as the water-neutral building envelope, the ‘plot passport’ and a sustainable sewerage levy.

We are converting these insights into a framework, and creating a decision-support system (decision model) to enable the customized application of the available instruments that is tailored to the local situation.

This includes factors such as the plot and its geography, the local land use plan, investment ambitions, risk considerations and the anticipated level of acceptance by other public and private parties.

We also focus on the extent to which instruments are legally binding or incentivizing and to what extent they can be combined.

The framework and the decision model relates to existing overviews of instruments such as the Roadmap for Climate-Robust Local Regeneration of the City Deal Climate Adaptation.

Stakeholders involved

Waternet (local water board), the City of Amsterdam, Amsterdam Rainproof, City Deal Climate Adaptation, Heijmans and BPD.


To create a shared overview and to provide insight into the functioning of public-private instruments designed to ensure climate adaptation in the private sector.

Role and activities NextGreen

Interviewing | Drafting framework | Organizing and facilitating co-creation meetings for the decision model | Disseminating the lessons learned

In collaboration with Stroom en Onderstroom

Green Deal Infra Nature

Green Deal Infra Nature (2016 – 2019)

Department of Waterways and Public Works

The quality and quantity of biodiversity in the Netherlands is under pressure. Because of the large areas of roadsides, infrastructure in particular holds a large potential to create and connect natural areas and thus strengthen biodiversity. Initiated by the Dutch Butterfly Conservation, the parties involved in the Green Deal Infra Nature want to investigate and use the described potential. This will be done by sharing knowledge and experience in working groups on the subjects of construction, management, conservation, business models and procurement.


  • Government: Ministry of Economic Affairs, Ministry of Infrastructure and the Environment, Province of Noord-Brabant, Province of Noord-Holland, Municipality of Tilburg, Water Boards Vallei en Veluwe, Aa en Maas, Rivierenland, Rijn en IJssel, Hollands Noorderkwartier and Rijnland.
  • Businesses: Arcadis, Brabant Water, ENGIE Infra & Mobility, Gasunie, Grontmij, Heijmans, TenneT, ProRail, Vitens
  • Knowledge organization: Dutch Butterfly Conservation (Initiator of Infra Nature)


Using the construction and conservation of Dutch infrastructure to stimulate and strengthen biodiversity by

  • Mapping and exploring best practices
  • Sharing and developing knowledge
  • Creating enabling conditions by collaboration

Role and activities NextGreen

Prepare and facilitate co-creation workshops |  Organise and facilitate symposium |  Contribute to project management

Results and more…

Green Deal Green Roofs

Green Deal Green Roofs (2014 – )

Foundation Green Deal on Green Roofs

Vegetated roofs offer several advantages. For example capturing particulates, reducing heat stress in cities, buffering of water during heavy rains and increasing biodiversity. It also offers the enlarging of outdoor living space in cities.

Beyond the investors personal benefits there are many communal benefits to green roofs. The initiator Leven Op Daken (Living on Roofs) is searching for ways to scale up green roofs together with municipalities, water boards, financial institutions and research institutions. This is done in a Green Deal.

At phase 1 (2014 – 2015) we developed new revenu models. In phase 2 (2016 – 2019) we elaborate on the revenu models and experiment in pilot situations.


  • Governments: Ministry of Economic Affairs, Ministry of Infrastructure and the Environment, Province of North Brabant, Province of Overijssel, municipalities Almere, Amsterdam, Enschede, Tilburg, Eindhoven and Son and Breugel; Water boards Amstel, Gooi and Vecht, Aa and Maas, de Dommel, Vechtstromen
  • Umbrella organizations: VEBIDAK, Association for Vegetating Buildings (Vereniging Bouwwerk Begroeners), VHG Industry Associations of entrepreneurs in green, GDO association
  • Businesses: Living on Roofs, BTL the Netherlands, Mastum Roof Systems, Nelen & Schuurmans, Optigrün, Sempergreen, Van der Tol Group, Zinco Benelux, and Atelier GroenBlauw, Carlisle Construction Materials BV, Triflex BV
  • Knowledge organisations: Amsterdam Rainproof, NIOO, Roof Update Association, VIBA-Expo, Dutch Butterfly Conservation, Groenkeur Foundation


Stimulating the use of green roofs nationwide by

  • Developing a new societal business model
  • Identifying opportunities and breaking down barriers where possible
  • Testing the revenue models in pilot schemes

Role and activities NextGreen

Process management | Organising and facilitating multistakeholder co-creation meetings | Monitoring results, Opportunities and barriers | Communication

Results and more…

Previous project

Green Deal Green Roofs (2013)

Living on Roofs

After a pitch at the Ministry of Economic Affairs, Leven op Daken (Living on Roofs) took the initiative to let the opportunities of a Green Deal be investigated. Ministries, municipalities, provinces, water boards and similar organisations were approached for participation in a Green Deal Green Roofs. The result was a plan of action and a concept text for the Green Deal.