The study discusses the contractual relationship between the real estate developer and the buyer, with a focus on the sale contract on the plan. Mahmoud Hassan Al-Sahli points out that the Civil Law is the foundation of justice, based on the report of the Legislative Affairs Committee. It also reviews the emergence of real estate development in France after World War II, when the state needed to rebuild cities and provide social housing, which led it to rely on real estate developers. The real e...