Sweden enacted ambitious environmental goals to mitigate climate change and cut carbon emissions. Swedish public agencies have promoted restricting parking norms to decrease automobile travel. This paper proposes a model to calculate flexible parking norms based on urban form and accessibility factors commonly used in architectural, urban design and planning practices. The transportation systems like the automobile need physical preconditions such as parking spaces and motorways that support driving around. The rationale is that parking norms can be lowered to zero if the urban form supports sustainable mobility choices, namely walking, cycling and public transportation. The model aims to inform municipality officials and developers, architects, urban designers and planners about urban form preconditions and integration with walking, cycling and public transportation as possibilities to reduce parking requirements and meet sustainable mobility goals.