March 3, 2026
The short answer: The average cost for standard drain unblocking in London and Hertfordshire ranges from £80 to £145 for simple rodding, and £150 to £250+ for high-pressure jetting.
Pipe descaling typically costs between £180 and £300 depending on the severity of the scale buildup and pipe length. Emergency, out-of-hours callouts will generally add an £80 to £100 premium to the base price.
If you are dealing with a slow-draining sink, a foul smell, or a completely backed-up sewer, you are likely wondering how much it is going to cost to get it fixed.
It is a stressful situation, but understanding the pricing structure before you call a drainage expert can help you avoid unexpected bills.
Drain Service Cost Estimator
Get a rough estimate for your London/Hertfordshire property.
The Scale of the Problem in the UK
Before diving into the costs, it helps to understand why these blockages happen. You are not alone in dealing with drainage issues. According to data from Water UK and Thames Water, the UK uses roughly 11 billion wet wipes every year.
90% of all sewer blockages in the UK are caused by wet wipes and “fatbergs” (congealed fat, oil, and grease).
Thames Water clears approximately 75,000 blockages a year from its network.
This widespread issue costs the network an estimated £18 million annually to manage.
If your drain is blocked, there is a very high chance it is due to a buildup of these “unflushables” or hard water scale. Here is how much it costs to clear them.
Drain Unblocking Price Breakdown (2026 Averages)
The cost of unblocking a drain depends heavily on the method required to clear it. Not all blockages are created equal.
| Service | Estimated Cost (Standard Hours) | Best For |
| Manual Rodding | £80 – £145 | Minor blockages, paper buildup, single blocked toilets or sinks. |
| High-Pressure Water Jetting | £150 – £250 | Severe blockages, fatbergs, grease, and main drain obstructions. |
| Pipe Descaling | £180 – £300+ | Hard water scale, recurring slow drains, pipe restoration. |
| Root Cutting & Removal | £250 – £400+ | Tree roots invading underground pipes. |
| CCTV Drain Survey | £100 – £275 | Identifying hidden structural issues, recurring blockages, or pre-purchase surveys. |
(Note: These are average estimates for London and the Home Counties. Prices may vary based on exact location and property size).
Exploring the Solutions
1. Manual Drain Rodding (£80 – £145)
Drain rodding is the most traditional and cost-effective method. An engineer uses flexible steel or composite rods to manually break up the blockage. If your kitchen sink is backed up due to food debris, or your toilet is clogged with excess paper, rodding is usually the first and fastest line of defense.
2. High-Pressure Drain Jetting (£150 – £250)
When rodding isn’t enough, we bring in the heavy machinery. High-pressure water jetting blasts water through your pipes at incredible force, effectively stripping away stubborn fat, grease, and compacted wet wipes.
This method doesn’t just puncture the blockage; it scrubs the internal walls of the pipe clean, reducing the chance of the issue returning in the near future.
3. Pipe Descaling (£180 – £300+)
London and Hertfordshire are notorious for hard water. Over time, calcium and magnesium deposits build up inside your pipes, creating a rough surface that catches debris and eventually constricts water flow. Descaling involves using specialized mechanical tools with rotating chains or high-pressure jets to scrape the scale off the pipe walls, restoring them to their original diameter. If you have older cast iron or clay pipes, descaling can add decades to their lifespan and prevent the need for a total pipe replacement.
4. CCTV Drain Surveys (£100 – £275)
If your drains keep blocking, you shouldn’t just keep paying for rodding. You need to see what is happening underground.
A CCTV drain survey involves sending a high-tech camera down your pipes to inspect for collapsed sections, tree root intrusion, or displaced joints. A basic “look and see” survey starts around £100, while a comprehensive survey with a full written report (often required for home buyers or insurance claims) ranges from £200 to £275.
Factors That Will Increase Your Bill
When requesting a quote, keep these variables in mind:
Out-of-Hours Emergency: Drainage emergencies don’t stick to a 9-to-5 schedule. If you call a plumber at 2 AM on a Sunday because sewage is backing up into your bathroom, expect to pay an emergency call-out premium of £80 to £100 on top of the standard labor rate.
Access Difficulties: If your inspection chamber (manhole) is buried under a patio or is heavily rusted shut, the extra labor time required to access the drain will increase the cost.
Property Type: Commercial buildings, restaurants, or properties with extensive, complex drainage networks require more time and heavier equipment than a standard 3-bedroom terraced house.
Stop Guessing. Get It Fixed.
Ignoring a slow drain won’t make it go away; it usually just leads to a more expensive emergency callout down the line. Whether you need a quick unblocking or a full pipe descaling, transparency is key.
Need an exact price for your property? Contact our 24/7 team at Drain 247 for a no-obligation quote, or explore our Drain Unblocking Services to learn more.
