Often, decisions about how best to invest to achieve sustainable cities are made without consulting the most important stakeholders: the citizens themselves. Involving citizens in these decision-making processes is crucial because allowing them to propose ideas, voice their concerns, and influence decisions about what to invest in and why can increase the impact of investments.  

Citizen participation methods can foster a strong and transparent democratic process, while at the same time benefitting municipalities by finding innovative sustainable solutions, strengthening local action, and gaining support for the implementation of new ideas. When it comes to investments, participatory budgeting can support inclusive and creative decisions throughout the whole process: from choosing what to invest in and why, to giving feedback on the achievement of the investment.