Quick answer
If a drain blocks in the same spot, or water pools in the garden, the pipe may have a crack or a collapse. A CCTV survey shows which. Many cracks suit pipe relining, which repairs the pipe from the inside without digging. However, a collapse or a badly shifted pipe may need excavation instead.
Signs your drain needs repair, not just clearing
- The same section blocks again, even after clearance
- A patch of garden or drive is soft, sunken or unusually green
- A damp or musty smell inside the home has no clear source
- A path or wall near a known drain line shows cracks or movement
- Water backs up or drains slowly when nothing seems to block it
If clearing the drain only buys a few weeks, the pipe itself may have damage. The blockage then acts as a symptom, not the cause. That is why a repair plan should start with evidence.
Start with a CCTV survey
Relining and excavation solve different problems, so see the drain before you choose. A CCTV drain survey sends a camera through the pipe and records the fault.
The wrong repair wastes money. A liner will not hold in a collapsed pipe. Digging up a garden is needless if a liner would work.
Many surveys grade defects against MSCC5, the Manual of Sewer Condition Classification from WRc. A lightly cracked pipe that still holds its shape tends to suit relining. A collapse, or several failed joints close together, usually does not.
Pipe relining: when it works
Pipe relining creates a new pipe inside the old one. A resin-soaked liner goes in through existing access points and cures in place. It usually suits the cases below, while other cases need a dig.
- Cracked or fractured pipes that still sit roughly in line
- Root damage at joints, once the roots are cut back
- Pipes under a drive, patio or mature tree, where digging would cost more
Relining works through existing manholes or a small access point. As a result, it tends to leave gardens, drives and patios alone. That matters when the run passes under a paved area, since digging there costs more.
Drain excavation: when it is needed
Drain excavation means digging down and replacing the damaged pipe. You need it in the cases below, which a liner cannot cover.
- A section has fully collapsed instead of cracking
- The pipe has moved too far out of line for a liner to follow
- Several joints have failed close together
- The drain was laid with too little fall and must be re-graded
Excavation is more disruptive. However, it is the only reliable fix for damage that a liner cannot cover. The survey tells you which group your drain falls into.
What repairs cost: typical UK ranges
These figures come from national price guides read on 2 October 2026. They are not Essex quotes, and the sources disagree. Use them as a guide only, since your pipe and access will differ.
| Repair | Typical UK range | Source |
|---|---|---|
| Relining | £80 to £150 a metre | MyJobQuote |
| Relining | £70 to £250 a metre; a typical home job £1,500 to £4,000 | WP Drainage |
| Patch repair | £150 to £300 | MyJobQuote |
| Excavation | £250 to £650 a metre | MyJobQuote |
| Fully collapsed pipe needing partial or full replacement | £1,000 to £3,000 | MyJobQuote |
| Collapsed drain repair | about £850 on average | MyJobQuote |
Costs depend on pipe length, depth and access. Ask the engineer for a written quote that names the method and the length covered. Also ask what the quote includes for the surface, because digging leaves marks.
Rules and permissions
Most straightforward repairs need no planning permission. Building Regulations Part H covers drainage, including building over sewers (Approved Document H, gov.uk).
If a repair sits near a public sewer, the water company may need to agree first. The same applies if the work changes a drain route. Raise this once the survey shows the work you need.
Repair pages by town
Repair options depend on the pipe, not on the town. If you live in Braintree, Springfield or Witham, read drain repairs in Braintree, drain repairs in Springfield and drain repairs in Witham for local details and questions to ask.
- Drain repairs in Chelmsford
- Drain repairs in Maldon
- Drain repairs in Billericay
- CCTV drain surveys in Chelmsford
- All drain repair options
Frequently asked questions
How do I know if I need relining or excavation?
You cannot tell from symptoms alone. A survey costs less than either repair, and it helps you avoid paying for the wrong one. A crack that looks small from above can hide a collapse below.
Is relining as strong as a new pipe?
A resin liner forms a new jointless pipe inside the old one, and it is a recognised repair method. Ask the engineer what the quote covers and for how long. Ask for those answers in writing, since promises need to be on paper.
How disruptive is excavation?
It depends on depth and position. A shallow run near a manhole causes less disruption than a deep run under a drive. The survey shows these details before work starts, so you can plan around them.
Can I get both options quoted together?
Yes, and it is a sensible approach. Surveying first means each quote reflects the repair the pipe needs. You then compare like with like, and our drain repairs service page lists both routes.
Where can I read about survey costs?
Read our guide to CCTV drain survey costs. It explains what moves the price, and it also shows typical UK ranges.