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london's #1 drainage contractors

Pre-Purchase Drain Surveys

A house can look perfect from the outside while hiding a dark secret underneath it. Before you buy, you need to make sure that your dream home doesn’t become a nightmare from blocked or damaged drains.

Even if the drains appear to be working perfectly, it’s still worth carrying out a CCTV pre-purchase drain survey.

If we detect early warning signs of drain damage, we can apply a quick, cost-effective patch treatment rather than have to carry out expensive and invasive excavation works to repair the pipe.


Due to increasing drainage issues from ageing Victorian plumbing, many mortgage providers now require a pre-purchase drainage survey and they are recommended by building surveyors and the Environment Agency.

If a pre-purchase drain survey isn’t mandatory, you should still carry one out to avoid unexpected costs after you move in.

If you discover damage to the drains before you buy the property, and repairs which need to be carried out can be covered by the existing owner’s home insurance or the cost could be negotiated off the purchase price.

But if you discover damage after the keys are in your hands, you’ll have to cover the costs yourself.


Our friendly team of professional drainage engineers will insert a CCTV probe to inspect your entire
drainage and sewage system, and can fit through pipes just 70mm wide and at depths up to 100 metres.

You will then receive a detailed report of our findings, including full video of the survey and photos of any signs of blockage or damage. Should further works be recommended, we can provide a quote for cleaning, unblocking or repairs.

We use cutting edge, reliable CCTV cameras and our reports are legally recognised documents created using regulation-compliant reporting software provided by WinCan.

How do drains become damaged?

There are many reasons drains can become blocked or damaged. Most commonly, it’s a simple build up of hair, kitchen waste and toiletries which can be jetted away.

A blockage can also be caused by soil that which entered a pipe through cracks, which will be a reoccurring issue if the pipe isn’t fixed with a patch. These cracks can widen over time, until the pipe becomes so weak it collapses and has to be replaced.

Cracks form through age and erosion (common in old Victorian drains), root ingress from nearby trees or vibration from heavy vehicles or construction work.

The important thing is to catch problems early and not flush away blockages without identifying the cause with a CCTV survey, otherwise we lose all our valuable evidence.                   

Call Environ now to book your pre-purchase drain survey

Pre purchase drain survey cost Our pre-purchase drain survey takes two hours and cost just £350 plus VAT. Call us now or request your call back to book today.
41d1b34fe02fd992f7a5a05aba694134.CCTV Drain Survey

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I wanted to take a minute and thank you all for resolving the damp issue we had. Its so nice to come home and not see or smell the disaster that was there before. Just in time for Christmas which I would have to say you guys saved as we have family coming who had their flights already booked. A massive relief Thank you so much!! Would definitely recommend your team from initial contact to works completed. Great job.
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I chose to use Environ to deal with a damp wall, the whole process from beginning to end has been straightforward, well explained and they've managed to strike a pleasing balance between friendliness and professionalism. Everyone they sent over during the course of the work, as well as their office staff has been, nice helpful and accommodating. I hope not to need to use them again but if I do, I'll do so gladly!
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Came round to have a look at work required and actually realised it was all low level work. Explained and showed what was required. They can back about a week later (or thereabouts) to carry out the work which was done very quickly (about an hour if I recall). Because it took less time than was originally thought have not been charged for the materials so was very happy about that.

Ryan R.


Kristian F.


Jacqueline M.