Earth construction is emerging as a sustainable and local solution for reducing the environmental impact of the construction industry. Numerous research initiatives are currently revitalising this traditional construction material, gathering many experts. Earth is a mix of particles of various sizes, from clay and silt to sand and gravel. These materials can be used for structural or non-structural purposes, with compressive strengths ranging from 1 to 10 MPa. They also offer superior indoor hygrometric regulation properties. However, their water sensitivity poses durability issues. Recently, low-tech stabilisation solutions have emerged to enhance water resistance. Simultaneously, Europe dredges 50 million cubic meters of marine sediments annually, with France contributing significantly. The traditional solution of sea disposal raises environmental concerns, leading to stricter regulations favouring sediment valorisation. Like earth, sediments are mainly a mix of mineral particles but may also contain other pollutants. Although these sediments present technical and environmental challenges, their use reduces the need for natural resource extraction. Various solutions have been tested, including their application in earth construction. This proposed work evaluates the potential of incorporating sediments into earthen materials, examining the effects of salt and the possibility of stabilization with locally sourced seaweed extracts.