Co-design (which is defined as collective creativity of designers and people who are not trained in design through the whole design process) is widely used in the commercial sector to accelerate user acceptance and reduce product failure. Co-design has become more widespread in the public sector, especially in urban design, since it is more effective at engaging citizens than conventional public consulting practices. At present, we believe that co-design is not widely used by community-based organisations (CBOs). This might be because the value and practicalities for CBOs are not clear. A recent study suggests that small not-for-profit organisations (NPOs) including CBOs need to make a good use of collaborations, since they rely on small numbers of committed staff and/or volunteers and so are vulnerable if they leave. The study also reports that most NPOs are interested in collaboration for idea/information sharing, which fits with co-design. Although leaders and members of CBOs recognise problems and needs of the poor/disadvantaged, they do not necessarily have first-hand experience. Thus, good use of co-design between CBOs and their beneficiaries could lead to better services and more effective means of delivery - reducing unnecessary costs and maximising value which is crucial where public budgets are limited. Successful community co-design projects not only unlock the creative potential of communities, but also help them become more self-reliant and resilient. However, the extent of co-design practice in CBOs is unknown. Moreover, not all CBOs' experience of co-design are successful. CBOs need to understand the costs, risks, benefits, and practicalities of co-design approaches. These will be specific to their context and their mission. To enhance community co-design led by CBOs, we need to evaluate CBOs' current experience and disseminate good practice that is appropriate to their scale and their missions. As a result, the aim of this research project is to "understand CBOs' state of knowledge of co-design and develop guidance to help CBOs effectively co-design with their beneficiaries to deliver better services at lower cost." We will achieve this aim by 1) reviewing existing understanding and experience of co-design in CBOs; 2) examining costs, risks and benefits of co-design in CBOs; 3) identifying good practices within the third sector and from other sectors, that can be applied to CBOs; 4) collating lessons learned and develop good practice guidance for CBOs; and 5) disseminating the findings and the guidance to CBOs' key stakeholders, policy makers and the wider design research community. We will work with the National Council for Voluntary Organisations (NCVO) and other small-and-medium-sized NPOs throughout the project to ensure proper engagement with CBOs and the practicality of the outcomes.