Drain Relining Cost London 2025 — No-Dig CIPP Repair Prices
Drain relining (CIPP — cured-in-place pipe lining) repairs cracked, collapsed, or root-damaged drains without excavation. In London, costs range from £500 for a patch repair to £5,000+ for a full 15-metre main drain liner. This guide explains costs, the process, and when relining is the right solution.
Drain Relining Costs in London 2025
Drain relining uses cured-in-place pipe (CIPP) technology to install a new pipe within the existing damaged one — without digging up your garden, driveway, or floor. London costs reflect the complexity of the drain, depth, diameter, and access:
- Patch repair liner (up to 1 metre): £400 - £800
- 3-metre section liner: £700 - £1,400
- 6-metre section liner: £1,200 - £2,200
- Full 15-metre main drain liner (110mm diameter): £2,500 - £5,000
- Larger diameter (150mm+, typical main sewer lateral): £3,500 - £7,000 for 15 metres
- Additional lateral reinstatement (reopening branch connections): £200 - £400 per connection
Compare this to traditional open-cut excavation, which for a 10-metre drain in a London garden typically costs £6,000-15,000 including breaking up block paving or concrete and reinstating the surface.
The CIPP Relining Process
Drain relining follows a defined sequence:
- CCTV survey: The drain is surveyed with a push-rod or crawler camera to identify all defects, measure dimensions, and confirm the drain is suitable for lining
- High-pressure water jetting: The drain is thoroughly cleaned to remove scale, root intrusion, grease, and debris. The pipe must be clean for the liner to bond correctly
- Liner preparation: A fibreglass or felt liner pre-impregnated with thermosetting resin (epoxy or polyester) is prepared to length and saturated evenly
- Inversion or pull-in-place: The liner is installed by inversion (bladder inflation) or pulled into position using a cable. It is pressed against the pipe wall by an inflated bladder
- Curing: The resin is cured using ambient temperature, hot water, or UV light depending on the system. UV cure takes 30-60 minutes per section; hot-water cure takes 2-4 hours
- Reinstatement of laterals: Branch connections are reopened by a robotic cutter operated via CCTV. This step is critical — blocked connections cause flooding if overlooked
- Post-lining CCTV: The completed liner is surveyed to verify position, joint quality, and lateral reinstatement before handover
When Is Relining the Right Solution?
Relining is suitable for:
- Longitudinal cracks and fractures in clay, concrete, or pitch-fibre pipes
- Root intrusion where roots have penetrated joints but have not caused structural collapse
- Displaced joints that are leaking but still broadly aligned
- Deformed pitch-fibre pipes (egg-shaping) that are causing flow restriction
- Corrosion in cast-iron or concrete pipes
Relining is not suitable for:
- Completely collapsed sections where the pipe has no continuous bore
- Pipes with severe offset joints where the lining cannot bridge the gap
- Very tight bends below minimum bend radius for the liner system
- Pipes with active tree roots requiring removal before lining
Standards and Guarantee
CIPP liners installed to BS EN 11295 standards carry a design life of 50 years. Prestige Engineers offer a 25-year workmanship guarantee on all drain relining work, backed by insurance. All liners are pre-installation surveyed and post-installation CCTV verified with a WRc-coded defect report provided to the client.
Insurance Claims and Drain Relining
Many buildings insurance policies cover drain damage caused by ground movement, root intrusion, or collapse. A CCTV survey report showing the cause of damage is essential for an insurance claim. Relining is preferred by insurers over excavation where possible due to lower costs and less collateral disruption. Prestige Engineers can provide the survey report and insurance-compliant quotation required for a claim.
Frequently asked questions
How long does drain relining take in London?
A standard residential drain relining job takes one day. This includes jetting, liner installation, curing (UV systems cure in under an hour), lateral reinstatement, and post-lining CCTV verification. Longer runs or multiple sections may require two days.
Does drain relining require access to the drain at both ends?
Most relining systems require access at one end to install the liner and at the other end to attach the curing equipment. Standard domestic drains usually have manholes at each end. Where access is limited, alternative techniques such as local patch repair or robotic cutting may be used.
Will drain relining affect my property's water pressure or flow?
A properly installed CIPP liner reduces the internal diameter of the drain by approximately 6-8mm (for a 110mm drain). This minor reduction has no practical effect on normal domestic drainage flow and often improves flow by creating a smoother bore compared to the original encrusted pipe.
Can I reline a drain under a concrete slab or floor?
Yes — relining is specifically advantageous in this situation. A drain running under a concrete floor, extension, or conservatory that would cost thousands to excavate can be relined via access manholes at either end with no disturbance to the slab.