Public spaces are often failing girls and women, with male dominance and a lack of representation being prevalent issues. The 2030 Agenda emphasises the need for safe and accessible public spaces for women, children and other disadvantaged or marginalised groups. Nevertheless, women and girls tend to be neglected in the development of urban areas, and their specific needs and risks are not fully considered. Hence, there is a need for feminist urban planning. Feminist planning aims to understand, challenge, and change power relations in public spaces, by involving the experiences, needs, and desires of marginalised groups in the planning process in order to create more equal cities. This approach recognises the individual and collective power that women and other disadvantaged groups already possess. Social innovation is an innovative practice for meeting social needs and shares a common goal with feminist planning of promoting social change and increasing power for disadvantaged groups. However, whereas feminist urban planning – and urban planning in general – tend to end when a project has been planned and executed, social innovation has a stronger and more explicit focus on results or impact of the process or project. This is an aspect where feminist planning can learn from social innovation. By addressing the specific needs of marginalised groups and focusing on results and actual change, feminist planning can contribute to positive social change and empower women and girls in urban development processes. This viewpoint argues that feminist planning can learn from the focus of social innovation on results (i.e. output, outcome and impact of the planning), which has the potential to change planning practices and challenge gendered social norms in order to create more equal, just and socially sustainable public spaces and cities.