Knowing the exact layout of your underground drainage system is vital for extensions, repairs, and new connections. Without accurate information, builders, engineers, and homeowners risk damaging drains or creating non-compliant systems. Our drain tracing and mapping service uses advanced technology to locate, trace, and map your drains with precision.
Not knowing where drains run can lead to serious problems such as:
Drain mapping is often required to satisfy planning applications, building regulations, or water authority approvals. Our surveys provide clear, accurate maps that give all parties confidence and ensure compliance.
Whether you’re buying, selling, or improving a property, having a clear map of your drainage system provides reassurance and avoids hidden surprises later on.
A drain tracing and mapping survey isn’t just useful for construction projects—it’s an important tool for anyone who needs clarity on their underground drainage system. We recommend arranging a survey in the following situations:
In all these cases, a professional drain tracing and mapping survey gives you accurate information, helps prevent costly mistakes, and ensures compliance with local building and drainage regulations.
Every drain mapping survey includes a detailed report and plan. Our deliverables typically include:
These documents provide contractors, homeowners, and local authorities with everything needed for safe, compliant work.
Every mapping survey is unique, but most follow a proven process to ensure accuracy:
We identify all manholes and inspection chambers to establish entry points into the drainage system.
Using advanced sonde and radio detection equipment, we trace the exact path of drains both above and below ground.
Our technology allows us to accurately record the depth, direction, and gradient of pipes to build a full drainage profile.
Where needed, we combine mapping with CCTV surveys to check the internal condition of drains and identify defects.
We compile our findings into a professional report, including site plans, drawings, and photographic evidence.
Our engineers provide expert advice on drainage layout, risks, and any further work required for compliance or safety.
Clearmasters use the latest technology to provide accurate drain tracing and mapping across Surrey, Sussex, Kent, Hampshire, and London. With over 30 years’ experience, we deliver results you can trust.

Trusted experts with decades of drainage experience
At Clearmasters, we provide accurate and reliable drain tracing and mapping services for domestic, commercial, and industrial clients. Whether you’re planning an extension, repairing drains, or selling a property, our surveys give you the clarity and documentation you need.
We use the latest sonde and detection equipment alongside high-definition CCTV cameras to deliver precise, detailed results. Our reports are clear, professional, and accepted by local authorities, contractors, and solicitors.
With fast response times, competitive pricing, and a highly experienced team, Clearmasters are the trusted choice for drain mapping across the South East.
Drain tracing uses specialist equipment to locate and track the route of underground drains. It provides an accurate map of your system without the need for excavation.
Yes. Building over or near drains without accurate mapping can lead to structural issues and non-compliance with building regulations. Mapping ensures safe and legal construction.
Most domestic drain mapping surveys are completed within a few hours. Larger or more complex commercial systems may take longer. Reports are typically delivered within 48 hours.
Yes. Our drain mapping surveys provide professional reports and plans that can be submitted to local authorities and planning departments as part of your application.
Absolutely. Many clients choose to combine mapping with a CCTV drain survey for a complete overview of layout and condition. This ensures no hidden issues remain undetected.
Yes. We provide drain tracing and mapping services for homeowners, landlords, builders, local authorities, and commercial sites of all sizes.