The document analyzes the economically optimal heat supply options for new low-energy building areas (LEBs) located near urban areas in Sweden. It models three options: individual heating systems for each building, a small local district heating system within the LEB area, or connecting to the larger district heating system of the nearby urban area. The analysis considers various LEB densities and distances to urban areas. It finds that connecting to a large urban heating network is generally the lowest cost option due to economies of scale in transmission and distribution costs. The cost components, including transmission and distribution costs, vary significantly based on density and distance.