How Much Does It Cost to Unblock a Drain in London?

Unblocking drains is a common issue in the UK, including London. Here the bustling urban environment can place additional strain on drainage systems. This causes homeowners and businesses to seek professional help for needed repairs and unblocking. The essential question that promptly arises in this scenario is: what is the cost of unblocking drains?

In this informative guide, we’ll discuss the intricacies of drain unblocking costs in London. We’ll shed light on factors that influence pricing and provide you with a comprehensive understanding of what to expect when you encounter a drain blockage.

If you’d like to speak to a drain unblocking expert right away, call 0800 999 1769 or email now.

Unblocking a drain

Unblocking a drain involves a series of steps that require professional expertise. When you discover a blocked drain in your London home or property, it’s essential to resist the temptation to tackle it as a DIY project. Instead, consider the services of a professional examinator and drain-unblocking expert.
The process typically begins with a thorough inspection of the blocked drain. The expert will use specialised tools to identify the cause and location of the blockage. This step is crucial in determining the most effective approach for unblocking the drain.

Once the issue is diagnosed, the unblocking process may involve techniques such as high-pressure water jetting, drain rodding, or chemical treatments. The choice of method depends on the severity and nature of the blockage.

Professional drain unblockers are equipped not only with the right tools but also with the knowledge and experience. They ensure that the blockage is cleared and that your drainage system is restored to proper functioning.

That said, it is natural that expert services come with a cost. Remember, quality unblocking and repairs are a worthy investment to ensure that such problems don’t occur frequently.
Let’s delve into the various factors that can affect the cost of unblocking drains in London.

8 factors affecting the cost of drain unblocking in London

  1. The severity of the blockage

    The extent of the blockage is a key determinant of cost. Minor blockages, such as those caused by debris or grease buildup, are often easier and less expensive to clear.
    Conversely, severe blockages, which may involve solid obstructions or extensive buildup, demand more time and effort. This potentially increases the overall cost of unblocking.
    Pro tip: To avoid these situations from arising, conduct regular maintenance of your drainpipes. You can also opt for regular service agreements from a reliable local drain unblocking company in London. This is applicable to both domestic and commercial properties.

  2. Location of the blockage

    The blockage’s location within your property can impact the cost. Drains that are easily accessible from the surface, such as kitchen sink drains, are generally simpler to unblock. As a result, they tend to be more cost-effective.
    However, drains located in hard-to-reach areas, such as beneath the property’s foundation, may require specialised equipment and expertise. This leads to higher costs.

  3. Type of blockage

    The nature of the blockage is a significant factor. Common blockages caused by organic debris or foreign objects may be relatively straightforward and affordable to clear.
    In contrast, blockages resulting from root intrusion, pipe collapses, or major obstructions can be more challenging to resolve. This often necessitates more extensive work and resources, which can increase the cost.
    Pro tip: When buying a property in London, get expert help in conducting a thorough CCTV survey of the drainage system. This will help you make an informed decision and avoid or reduce unnecessary future repair costs.

  4. Time of service

    Emergency situations may arise at any time. It could be a burst pipe situation, complete drain blockage, sewer backups, structural damage, or something else. These situations will require you to seek drain unblocking services outside of regular business hours, such as during weekends or holidays. Which comes with higher costs.
    Drainage specialists providing 24/7 emergency services in London may charge premium rates for immediate assistance. The urgency of the situation should be factored into the cost consideration.

  5. Drain size and material

    Larger drains, such as those found in industrial or commercial settings, may require more substantial equipment and effort to unblock. This contributes to a higher cost.
    Additionally, the material of the drainpipes can influence pricing. Some materials, like older clay pipes, can be more challenging to work with. This may result in increased costs compared to modern PVC or metal pipes.

  6. Additional repairs

    In some cases, a blockage may cause damage to the drain or the surrounding plumbing system. When this occurs, additional repair work may be necessary to fully resolve the issue. Repair costs can vary widely depending on the extent of the damage and the materials involved. This will add to the overall expense of the service.
    Pro tip: If you have an old drainage system with frequent leaking issues on your property, consider drain lining. This will be very much like fitting a fresh pipe within your existing pipes. When you rely on experts for the process, you can rest assured that the damaged areas will be meticulously covered.

  7. Professional expertise

    The level of expertise and reputation of the drainage specialist can impact the cost. Established professionals with a proven track record may charge higher rates for their services.
    However, their experience often ensures efficient and effective solutions. While it may result in a slightly higher initial cost, the quality of work and long-term results can justify the investment.

  8. Geographical location

    The cost of drain unblocking services can vary across different areas of London. Factors such as local competition, demand for services, and the cost of living in a particular area can influence pricing.
    Generally, areas with higher living costs may have slightly higher service rates. It’s advisable to obtain quotes from multiple service providers in your specific location to compare prices and find a service that fits your budget while maintaining quality.

The cost to unblock a drain in London

The cost of unblocking drains in London can range from £75 to £250 or more, depending on the factors mentioned above. For routine blockages in accessible locations, you may find lower-end pricing. However, complex blockages or emergency services can incur higher costs.
It’s advisable to obtain multiple quotes from reputable drain unblocking services in London. This will help compare prices and ensure a fair deal for your specific situation.
Get a fast quote for unblocking your drain. We work throughout Bromley and the surrounding areas. Our experts will offer a customised estimate that will fit your needs and budget.


Unblocking drains is a necessary service for homeowners as well as commercial sites in London. You need to get quality repairs and unblocking services to ensure the proper functioning of your plumbing system. The cost to unblocking a drain will vary based on various factors: the severity, blockage location, time of service, and more.
We hope this guide has helped you with great insights into each of these factors and some unblocking best practices. Keep our pro tips handy to avoid or reduce unblocking and repair costs.
Remember, it is essential to choose a trustworthy and experienced drainage solutions company in London. Take their help for regular maintenance services. This will significantly reduce blocking issues and related costs.
Contact BN Drainage for drain unblocking assistance in London. Between us, we have over 40 years’ experience in the industry. We are your unrivalled choice for all kinds of domestic and commercial drain services.