The agreement not only ensures that Thames Water can have sufficient access to sewer or runoff in the future, but also that the proposed foundation is designed to reduce the risk to the sewer or runoff. Alternatively, Thames Water may require that the proposed foundation be erected at a safe distance from the sewer or drain, thus avoiding the risk of damage. Neglecting or ignoring a Thames Water-Build-Over agreement can lead to significant delays for a project, as construction cannot legally begin until it is in place. Therefore, it is important to ensure that this is taken into account both in the schedules and in the cost of the project. The first point to note is that a construction agreement only applies to sewers and public drains. Any excavation work within a 3-meter radius of a sewer or public drain requires a Thames Water Build Over agreement. Given the density of construction in London and other cities, this likely means that any work you wish to do on your property, including excavations, will likely require Thames Water`s review and approval. For this reason, Thames Water Build Over agreements are in place and generally required for the proposed structure to obtain a building permit certificate, also known as “approval” building codes. So what is a sewer or public drain, in simple terms, a sewer serving more than one piece of land fall within the scope of a Thames Water Build Over agreement. As well as a drain and in particular the point where the drainage pipe crosses the border from one property to another. Argh hit the post too early. You must ask the sewer company when the sewer was adopted as part of the extension. I hope it was not accepted during the construction of the extension, in which case you would not have needed a construction agreement.
We saw a case where the owner assumed that the contractor had taken care of the Thames Water-Build-Over agreement, while the contractor assumed that the owner had done so. This confusion resulted in a 4-week work delay while relevant site surveys were completed, plans were made, and a Thames water engineer was visited on site. .