In general, you need a project when you plan to build, modify or extend a building. The project defines the architectural, structural and technical solutions required for proper construction.
For a new house, the design should be completed before construction begins. This is when the layout, structure, building systems, materials and technical solutions are determined in advance.
A well-developed project helps prevent costly changes during construction, provides a more accurate budget estimate and ensures better coordination between different specialists. The project documentation also forms the basis for obtaining the required construction documents and permits.
