Abstract Mitigation is a step to reduce the risk of disasters in a particular area. Tanjung Mas sub-district is an area that has a high potential for land subsidence and tidal flooding because it is located on the North Coast of Java. Temporary evacuation points are urgently needed to protect residents from the dangers of tidal floods and distribute logistics from volunteers. Based on community preferences, the Green Open Space in Tambak Lorok are used as an evacuation point for flood disasters. The green open space, which was initially used for sustainable water absorption, was converted into an evacuation point as a flood disaster mitigation measure. This research aims to measure the suitability of green open space as a temporary evacuation site. The research method used is a Space Syntax approach and qualitative description analysis. Based on the results of the analysis, almost all the requirements for evacuation places by the green open space location. It is easily accessible because it is on the primary residential route, easily accessible by vehicles, and has building structures higher than the road. However, the area of green open space still needs to be increased for the minimum standard capacity per person. Apart from that, the infrastructure to support evacuation, such as electricity, communication equipment, or rubber boats, needs to be improved. The construction of green open space as a temporary evacuation site needs to be adjusted to minimum standards and the needs of the population. It is also hoped that the development of green open space will be the responsibility of not only the government but also cooperation between stakeholders. Green open space isn’t just for environment impacts, but can also increase the community resilience.