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Working in the street

Working in the street

Our process

We follow the process set out in the New Roads & Streetworks Act 1991 (NRSWA) and the Transport & Works Act. The Act has several stages and each stage must be complete to progress to the next. Here’s everything you need to know if you’re going to undertake any work in the street.

Illustration of a Thames Water vehicle

Planning your work

Know the things to look out for early in your planning and how to request a C3 budget estimate.

Designing the solution

Understand the details we'll need as you progress your scheme and how to request a C4 detailed estimate.

Relocating pipework

If you're relocating pipework, you'll need to issue us with a C5 formal notice telling us you intend to proceed.

Final accounts

Learn more about our costs and settling your final accounts with us.