Is it expensive to build a house out of polystyrene blocks?

Building a house out of polystyrene blocks can be cost-effective in some cases due to their insulation properties and ease of construction, which may reduce labor costs. However, initial material costs can vary based on the specific type of polystyrene used and local market conditions. Overall, while the upfront costs might be comparable to traditional materials, long-term energy savings may offset these expenses. It's essential to consider local building regulations and climate when evaluating the overall cost.