The effects of climate change can also be observed in Hungary. Suddenly, heavy rainfall is more frequent, and periods of drought are longer. Managing the impacts of rainfall with changing intensity and distribution can be a major challenge for municipalities. The high proportion of paved surfaces further accelerates run-off. The stormwater drainage network is overloaded by the sudden arrival of large amounts of rainfall, which is discharged unused, sometimes causing severe damage through flooding. According to the findings of the UN Water Presidency, municipalities spend 90% of their financial resources intended for water damage reduction after disasters, reconstruction, and rehabilitation, while only 10% is spent on preventive measures and improving adaptive capacity. Prevention would be the preferred solution in the field of water management. Nature-based solutions in water retention are a suitable application for reducing exposure. Available different nature-based solutions: domestic rainwater storage, green roof or living roof system, green façade, permeable artificial surfaces, infiltration trenches and basins, trees and roadside green lanes. The primary objectives of our study are to provide an overview of nature-based solutions in the field of water retention and present the applied methods through case study of Nagykovácsi. The exposure of Nagykovácsi to flood-caused damage is high. Nature-based solutions offer promising opportunities for urban planning to provide a proper response to this challenge, including water management, flood protection, and adaptation to climate change.