The newly elected Conservative government has pledged to create 275,000 affordable housing units by 2020. In this context, the volume of requests for section 104 agreements is expected to increase exponentially. To avoid delays and additional costs for their projects, developers should consider drainage design and make important decisions, including the choice of materials, as early as possible. Before the start of the construction of the sewers, an acceptance agreement must be concluded in accordance with Article 104. A loan is also required, which represents 10% of the estimated construction costs.