Why You Need a Homebuyer Drain Survey
Drains are rarely covered by a standard house survey — yet a damaged drain can cost thousands. Here's why a homebuyer drain survey is worth it before you exchange.
You’re buying a house. You’ve booked a building survey, your solicitor is doing their searches — and the drains are almost certainly not being checked. That’s a problem, because a collapsed or root-damaged drain is one of the few defects that can cost thousands to put right and isn’t always obvious until it fails.
A homebuyer drain survey closes that gap.
Why standard surveys miss the drains
Most building surveys explicitly exclude below-ground drainage. The surveyor can comment on what they can see above ground, but they won’t send a camera down the drains. So the condition of the private drainage — the bit you become responsible for as the owner — typically goes unchecked.
What a homebuyer drain survey covers
We run a full CCTV drain survey of the private drain runs and connections, recording:
- Cracks, fractures and displaced joints
- Root ingress (a very common issue in older, tree-lined streets)
- Signs of a partial or full collapse
- Whether connections are correct and where they run — see drain mapping & tracing
You get footage and a clear, buyer-focused report you can share with your solicitor.
Why it’s worth it before you exchange
Timing matters. Book the survey before exchange of contracts, while you still have room to act on what it finds. If there’s a problem, you can:
- Renegotiate the price to reflect the cost of repair
- Ask the seller to fix it before completion
- Walk away if the problem is serious enough
Find a defect after completion and it’s simply yours to pay for.
It’s not just old houses
Period homes in cities like London, Bristol and Edinburgh often have original clay drainage and shared runs — prime conditions for root ingress and joint failure. But newer properties aren’t immune: poor installation, ground movement and misconnections all show up on camera.
How much does it cost?
Far less than a drain repair. We cover the cost of surveys in detail in our guide to CCTV drain survey costs, but a homebuyer survey is a small, fixed fee against a purchase worth hundreds of thousands.
Book before you commit
If you’re buying, get the drains checked while you still have leverage. Send us the property’s postcode and we’ll arrange a homebuyer drain survey and a report your solicitor can use.