When a client called us out recently, the job seemed straightforward.
They had a “slow drain.” Nothing urgent. The survey was just another box to tick before starting their build.

But five metres into the run, our CCTV camera revealed the real story: a collapsed pipe.

What looked like a minor nuisance could have turned into weeks of delays, torn-up ground and tens of thousands in unplanned costs. By catching it early, we were able to repair the issue, sign off the survey and give the green light for construction to move ahead with confidence.

Why Build-Over Surveys Are Not a Formality

Too often, build-over surveys are seen as red tape - something to satisfy the water authority or slip into a planning pack. The truth is, they’re far more valuable than that.

A pre-build drain survey can:

• Protect your programme – uncover hidden issues before they derail a project.

• Safeguard budgets – avoid costly rework and emergency repairs.

• Protect your reputation – deliver a project without the embarrassment of unexpected setbacks.

For developers, architects, contractors and homeowners, the message is clear: what lies beneath matters as much as what’s built above.

Common Issues Found in Build-Over Surveys

Our experience across projects large and small has shown that even “healthy-looking” sites can hide problems underground. Common findings include:

• Collapsed or cracked pipes

• Misaligned or poorly connected drains

• Root ingress and blockages

• Old materials failing under modern loads

Left unchecked, these issues can compromise both the drainage system and the construction above it.

The Clearline Approach

At Clearline Drainage, we specialise in CCTV drain surveys for build-over agreements. Our surveys don’t just meet the requirements of water authorities - they provide peace of mind for your build.

With detailed reports, video evidence and the capability to complete repairs in-house, we ensure that drainage is never the reason your project stalls.

Thinking of Building Over Drains?

Don’t risk building blind. A small investment in a CCTV drain survey could save you significant time and money.

📞 Get in touch with Clearline Drainage today to book your pre-build survey and build with confidence.