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Sewer diversions & buildover agreements

At RG Structural Engineers, we boast strong relationships with various UK sewerage undertaker companies and possess extensive knowledge of their requirements, particularly in obtaining drainage approvals. Our expertise uniquely positions us to prepare and secure agreements for sewer diversions or build-over agreements essential to support development proposals.

When a sewer pipe, adopted by the sewage undertaker, conflicts with development plans, a formal build-over agreement or diversion, as per Section 185 of the Water Industry Act 1991, with the sewerage authority becomes necessary to approve the required works.

Choosing between diversion or build-over depends on factors such as the span, size, and depth of the pipe in conflict, as well as cost considerations associated with each option.


Drainage Services RG Structural Engineers offers comprehensive drainage services to both commercial and domestic clients. From emergency drainage repairs and scheduled maintenance to designing and executing larger civil projects, our experienced engineers provide expert assistance and guidance regardless of project scale.
Reactive Drainage In case of drainage emergencies, our qualified drainage engineers, strategically stationed around London and the South East, aim to be on-site within two hours to promptly address issues. Additionally, we maintain a reliable network of out-of-hours engineers for emergency situations
Scheduled Drainage Maintenance Our maintenance agreements ensure regular servicing and upkeep of various drainage systems, minimizing the risk of blockages and costly repairs in the future. Scheduled maintenance helps prevent grease/scale build-up, root ingress, and other obstacles, ensuring optimal performance of drainage systems.
Sewer Diversion Guidance Under Section 185 of the Water Industry Act 1991, a sewerage undertaker may alter or remove relevant pipes to accommodate proposed improvements to a developer's land. RG Structural Engineers assists in the application process, providing necessary documentation and facilitating discussions with the Water Authority to determine the most suitable delivery method for the project.
Sewer & Drainage Connection Contractors With expertise in drainage and sewer maintenance and installation, RG Structural Engineers delivers seamless sewer, drainage, and wastewater connections for residential, commercial, and civil engineering projects. From combined sewer connections to surface water connections, our team ensures compliance with regulations and stakeholders' requirements, achieving timely and satisfactory project outcomes.

Drainage Projects

RG Structural Engineers undertakes commercial drainage projects of up to £10M value. From designing and installing foul or surface drainage systems to constructing pump pits/pumping stations, we deliver tailored solutions to meet project requirements. Our expertise includes Sustainable Urban Drainage Systems (SUDS), soakaways, catch pits, and land drains.

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Why Choose RG Structural Engineers for Sewer and Drainage Solutions?

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1. What are Sewer Diversions & Buildover Agreements?


  • Sewer diversions and build-over agreements are legal requirements under the Water Industry Act 1991 (Section 185) when a developer's proposed improvements conflict with existing sewage infrastructure. These agreements facilitate the alteration or removal of relevant pipes to accommodate the development, ensuring compliance and mitigating any disruptions.

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2. When are Sewer Diversions or Buildover Agreements Required?

Sewer diversions or build-over agreements are necessary when a developer's plans intersect with adopted sewage infrastructure. This could include scenarios where the proposed development affects the route or integrity of existing sewer pipes.

3. What Factors Determine the Need for a Diversion or Build-over Agreement?

The decision to opt for a diversion or build-over agreement depends on several factors such as the length, size, and depth of the conflicting pipe, as well as the associated costs. A thorough assessment of these variables guides the selection of the most appropriate solution.

4. How Does RG Structural Engineers Assist in Obtaining these Agreements?

RG Structural Engineers offers comprehensive support throughout the process of securing sewer diversions or build-over agreements. From preparing necessary documentation to liaising with relevant authorities, our team ensures a streamlined and efficient approval process.

SPACE_STAR _
SPACE_STAR _
2024-03-21
Best structural engineer in town, highly satisfied from the service .would definitely recommend them
Talal Zaman Abbasi
Talal Zaman Abbasi
2024-03-21
Great services, i hired them for the first time and impressed by the professionalism from the staff. They turned my idea into reality. Will definitely hire again in future.
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+4401753708740
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(+44) 0741 1505718

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