Why Isn't a Standard Survey Enough?
When buying a property, most buyers commission a HomeBuyer Report or a full structural survey. These cover the visible condition of the building — but they don't cover what's underground.
Drains are inspected visually at best, and a surveyor will usually note the inspection chamber as "not accessible" or "not tested" in their report. This means you could exchange contracts with no idea whether the drainage system is functioning correctly.
Drain repairs range from a few hundred pounds for a simple relining job to several thousand for a collapsed section requiring excavation. In the worst cases, drain failure can cause subsidence — an expensive structural problem that mortgage lenders and insurers take very seriously.
What Is a Pre-Purchase CCTV Drain Survey?
A CCTV drain survey for property purchase involves sending a camera through the drain network to inspect every section of pipe. The engineer records the footage and produces a written report detailing:
- The overall condition of the pipe work
- Any defects found (cracks, root intrusion, misaligned joints, collapse, scale build-up)
- The severity of each defect, graded on a standard scale
- Recommended remedial action with an indication of urgency
The written report and video footage can be shared with your solicitor, mortgage lender or insurer.
What Defects Are Commonly Found?
In our experience across Northeast England, the most common findings in pre-purchase surveys are:
- Root intrusion — especially in properties with large trees nearby
- Cracked or fractured pipes — common in older clay drainage systems
- Misaligned joints — caused by ground movement over time
- Scale and fat build-up — narrowing the pipe bore
- Shared drains crossing boundaries — important to identify for future maintenance responsibility
- Collapsed sections — usually in older properties with clay drainage
How Can the Report Help With the Purchase?
If a significant defect is found, you have several options:
- Negotiate a price reduction to cover the cost of the repair
- Request the seller repairs the drain before completion
- Walk away if the defects are too serious or the seller won't negotiate
- Factor the repair cost into your budget and proceed with eyes open
Even if no defects are found, you gain peace of mind — and evidence to support any future insurance claim if a problem emerges after you move in.
When Should the Survey Be Done?
Ideally, commission the survey after your offer is accepted but before you exchange contracts. This gives you time to use the report in negotiations without being legally committed to the purchase.
Some buyers also choose to do a survey earlier — particularly if they can see obvious warning signs like nearby trees, an old property, or a previous drainage problem mentioned in the seller's disclosure.
How Much Does a Pre-Purchase Drain Survey Cost?
At DrainGuard 24/7 Ltd, pre-purchase CCTV drain surveys start from £80, including a full written report and video footage.
We cover all of Northeast England — Newcastle, Sunderland, Gateshead, Durham, Cramlington, Blyth, Morpeth, Ashington, Hexham and surrounding areas.
Compared to the potential cost of drain repairs after you've moved in, it's one of the best value checks you can make.
Call 07887 212 447 to book — available 7 days a week, no call-out fee.
