CPV code 71242000 designates Project and design preparation, estimation of costs in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
71242000 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 71240000 (Architectural, engineering and planning services).