There’s nothing more frustrating than watching water slowly build up in your bathroom sink after brushing your teeth or washing your hands. A blocked sink is a common plumbing nuisance that affects homes across the UK, and when it strikes, you’ll want to know how much it'll cost to have it professionally sorted out.

In this blog, we break down the average cost of unblocking a bathroom sink in the UK, including the factors that affect the price, the time it takes, and when it’s time to call in a qualified plumber.

Need a trusted provider for sink unblocking services in London? Maintracts Services can help. Call us now on 020 8682 2244 or email info@maintracts.co.uk — we’re open 24/7.

Blocked sink ruining your morning routine? We provide fast, affordable, and expert drain unblocking services across London. Let Maintracts Services handle it quickly and cleanly — with no call-out fees.

Understanding The Cost To Unblock A Bathroom Sink In The UK

When it comes to resolving sink drainage issues, knowing what to expect can help you avoid unpleasant surprises. On average, the cost to unblock a bathroom sink in the UK typically ranges between £100 to £200, depending on several key factors.

We’ve been providing drainage and plumbing services in London since 1974, and we’re here to shed light on UK drain unblocking prices in 2025, so you can make an informed decision.

Factors Affecting Sink Unblocking Costs

Understanding what contributes to the cost of unblocking a bathroom sink can help you anticipate pricing before you make the call.

1. Severity Of The Blockage

A minor hair or soap buildup near the plughole can be resolved quickly and cheaply. However, deeper or more stubborn blockages — often caused by hardened waste or items stuck further down the pipe — may require more advanced techniques, which increases the price.

2. Access To Pipework

If the drainage pipe is difficult to reach or located behind walls or cabinetry, the labour involved may increase. More time, tools, and expertise may be required.

3. Time And Day Of The Appointment

Emergency or out-of-hours calls — such as those made on evenings, weekends, or holidays — usually come at a premium. Expect an increase in your unblock sink service cost if you need urgent assistance.

4. Drain Cleaning Methods Used

We may use rods, manual techniques, electromechanical equipment or high-pressure water jetting to break up the blockage depending on the specific requirements and whether the blockage is internal or external. More complex equipment can slightly increase the cost of drain cleaning in the UK.

5. Your Location In The UK

As a London-based plumbing company, we are aware that costs in the capital tend to be higher than the national average. That said, our transparent pricing structure ensures there are no hidden fees in sink unblocking services.

What’s Included In Our Drain Unblocking Service

When you book us to resolve a blocked sink, here’s what you can expect:

  • Fast response from qualified, insured plumbers
  • Clear explanation of the issue and solution
  • Use of safe and effective unblocking tools
  • Professional and tidy workmanship
  • Advice to help prevent future blockages

Need help with a sink that’s not draining?

Read our blog on Bathroom Sink Is Not Draining.

DIY Tips To Unblock Your Bathroom Sink Yourself

DIY solutions can work for minor blockages, such as using a plunger, boiling water, or a homemade mixture of vinegar and baking soda.

You can even learn how in our guide: How To Unblock A Sink Without Damaging Your Plumbing.

But in some cases, attempting a DIY fix might:

  • Push the blockage further down
  • Damage the pipework
  • Delay the need for a proper fix.

If you’ve already tried a few things and the water still won’t go down, it’s time to call the professionals.

When To Call A Professional Plumber

You should get in touch with us if:

  • The sink is draining very slowly or not at all.
  • You’ve tried basic DIY methods with no luck.
  • There’s a foul smell coming from the sink.
  • Other drains in your home are backing up.

In such cases, professional attention can help prevent further damage and unnecessary home plumbing costs in 2025.

Need a local expert? Check our full range of Bathroom Plumbing services in London.

How Long Does Sink Unblocking Take?

In most cases, our engineers can resolve a blocked bathroom sink in one to two hours. However, more severe blockages — especially those caused by underlying issues in the drain line — may take a little longer to clear.

We aim to complete the job on our first visit by arriving with all the right tools and replacement parts, so there’s no need for multiple appointments.

Do you have bigger issues with your home's plumbing system? Have a read through our Common Plumbing Issues guide.

Why Choose Maintracts For Sink Unblocking?

We’ve spent more than 50 years helping London homeowners and businesses with fast, affordable, and expert drainage services. Here's what makes us different:

  • No call-out charges
  • Engineers available 24/7
  • Honest, upfront pricing
  • Friendly, qualified professionals
  • Fully equipped vans for immediate fixes

Explore more of our Plumbing Services in London or contact us today for a no-obligation quote.

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Conclusion

The cost to unblock a bathroom sink in the UK in 2025 typically ranges from £100 to £200, depending on the complexity of the issue. While DIY methods can sometimes help with minor sink drainage issues, more severe or recurring blockages require professional attention.

At Maintracts Services, we’ve been solving London’s plumbing and drainage problems since 1974. Our fully qualified engineers deliver fast, reliable service — without call-out fees or hidden costs.

Do you need a quote or would you like to book an appointment? Call us on 020 8682 2244 or email info@maintracts.co.uk and let us get your sink — and your day — flowing again.

FAQs

1. How much does it cost to unblock a bathroom sink in the UK?

Typically, the cost ranges from £100 to £200, depending on the severity of the issue, the time of service, and access.

2. Do prices vary based on location in the UK?

Yes. London prices are often higher than elsewhere, though we offer competitive rates with no call-out charges.

3. Is unblocking covered under home insurance?

Not usually. Blocked sinks caused by wear and tear or neglect are typically excluded. Check your policy.

4. Can I save money by fixing a blocked sink myself?

Sometimes, yes — but it depends on the blockage. DIY attempts can also risk damage if not done correctly.

5. Are chemical drain cleaners included in the cost?

We rarely use chemicals due to their corrosive properties. Our tools and water jetting are safer and more effective.

6. How long does it take to unblock a sink?

Most jobs can be completed in one to two hours, especially when caught early.

7. What affects the total cost of the service?

Severity of the block, access to pipes, time of day, and whether specialist equipment is needed.

8. Should I get a quote before booking a plumber?

Absolutely. At Maintracts, we provide honest, upfront quotes with no hidden fees.