The aim of this study is to investigate how densification can be used to increase social and ecological sustainability in an urban area. This study focuses on the visions of the municipality of Sundsvall, a city located on the east coast of central Sweden, from a social and ecological sustainable development perspective and whether these visions are achievable for the densification of its urban centre. Additionally, this study considers how densification fulfils the social and ecological urban development of the city of Sundsvall. Given the possibility of both positive and negative impacts occurring through densification it is prudent to consider these impacts and to determine whether these impacts can be reduced by a socioecological urban developing perspective. To determine this, this study uses both quantitative and qualitative methods, such as GIS analysis, personal interviews and municipality resources to establish a sustainable, social and ecological outcome for the urban centre. Sundsvall aims to achieve a higher population density within its city centre. Increase accessibility to the waterfront and improve public transport options, therefore reducing the need for private vehicles and promoting environmentally sustainable alternatives. The aims of the municipality are certainly attainable, however due to certain factors specific to Sundsvall, these can only be achieved to a certain extent. Given the city’s location between two mountains, issues like sunlight, limited space for public service and the inability for smog to easily disperse creates a plethora of issues discussed in this study.