Before construction works actually begin, certain preliminary works must be performed on the construction site. The law requires installation of a construction hoarding, project information board, levelling, removal of rocks, trees, plants, plugging to prevent water collection, soil stripping, excavation, and then backfilling and laying out. The construction works are said to have started when the first post is set. Check out other advice we’ve prepared for you, and use our calculator to check the cost of preliminary works. You can also always contact our experts, who’ll be more than happy to answer.