The 15-minute city is an urban planning concept which seeks to enhance social sustainability by improving accessibility. In this master thesis accessibility in Amsterdam Nieuw-West is explored to better understand the link between the 15-minute city concept and social sustainability to answer the research question: To what extent is the 15-minute city able to enhance social sustainability? Empirical research is conducted to identify the indicators that truly affect accessibility. Literature regarding the subject has pointed out two scale levels which affect accessibility. The macro scale relates to accessibility of the infrastructure network and availability of facilities while the micro scale relates to the indicators affecting the accessibility of a place. There where also two categories of accessibility indicators defined. Physical accessibility indicators experienced directly because of the built environment and social accessibility indicators experienced because of the behaviour of people inhabiting the built environment. This creates an interesting dynamic of the designed physical accessibility and the social accessibility resulting from it. After the initial literature review, three research methods were used in the case study in Amsterdam Nieuw-West. First two project mangers affiliated with the municipality were interviewed which alongside case study documents aided the framework of known accessibility indicators in Nieuw-West. Thereafter, the way accessibility is experienced was studied on both scale levels. The macro scale by interviewing residents about their decision making process regarding their routes and destinations utilising mental maps and the micro scale by street interviews with users of Osdorpplein. The findings show that the 15-minute city concept is not applicable as a one size fits all solution for urban development as that would be discriminatory because of the different desires and capabilities of inhabitants. However, indicators of the 15-minute city on their own are able to improve accessibility and thus social sustainability.