Some projects are bigger than others. Depending on what you are looking to have done and what your needs are, you may want to contact not just a professional, but an expert.
Engineers are essentially designers who pay attention mainly not to aesthetics, but they focus on practicality, safety, and cost. There are all sorts of engineers; many focusing on building machines or structures. The latter may be particularly helpful for you in a renovation project, if you have encountered structural damage on your property, or if you are considering undertaking a particularly difficult building project.
Hydrologists work with water, mainly concerning themselves with assessing and protecting water quality and supply. As you embark on your project, you may want to contact a hydrologist to manage the water on your property. Surface water and groundwater could cause floods or other problems caused by a wide variety of reasons, including human activity like building.