The 5 best waterproofing in London that master quick damp fixes
London’s charm may be timeless, but its weather tests the patience and the limits of your home’s waterproofing.
From rainy rooftops to basements that seem set on becoming indoor ponds, the city’s mix of historic buildings and unpredictable weather keeps property owners alert.
That’s where London’s waterproofing experts come in, equipped with the skills to seal, shield, and protect every corner from the city’s damp conditions.
We’ve gathered the best companies in the city, each with their own strengths and specialties. This way, you can find the right team to keep your space dry, safe, and sturdy for years to come.
What is the average cost of waterproofing in London?
The average cost of waterproofing in London usually ranges from £100 to £120 per square meter. For a basement-sized area, like one measuring 4x5m with 3m high walls, overall project costs come out to about £8,000 on average. Given London’s higher cost of living, estimates suggest adding around 10 to 20 percent more. This increases the average cost in the London area to about £8,800 to £9,600.
1. MacLennan Waterproofing
Address: Unit 5, Helix Trade Park, Sun Rise Wy, Amesbury, Salisbury
Contact: +44 330 320 0240
Mail: [email protected]
Business hours: Monday to Friday, 8AM – 5:30PM
MacLennan has been in the basement waterproofing and damp-proofing business for over 30 years, and it shows. They don’t just sell you a system and leave tough parts to others—they take care of the design, supply, and installation themselves.
This means you know exactly who to hold responsible if something goes wrong later. People who have worked with them often say they are straightforward, explaining what’s needed without overwhelming clients with technical terms.
They’ve handled everything from delicate period homes to modern buildings, making them a reliable choice if your property needs special attention.
On the downside, their careful approach can result in higher prices, and they’re selective about the projects they take. But if you want a team that truly cares about doing things right, they deserve a spot on your shortlist.
Helpful
“Very professional service, installed a sump pump for me. All the team super helpful. When I had a query they dealt with promptly. High recommend.”
- Charlotte Roberts-Barr, Google Review
Professional team
“Very professional team and efficient team with exceptional customer service. The damp proofing was great value for money. I had a problem 4 years later and without hesitation they promptly fixed it. I would highly recommend this company.”
- Jill Hignett, Google Review
2. Newton Waterproofing Systems
Address: Newton Waterproofing Systems, 17-20 Sovereign Way, Tonbridge
Contact: +44 1732 496522
Mail: [email protected]
Business hours: Monday to Friday, 7AM – 5PM
Newton Waterproofing Systems has been around since 1848, which is almost hard to believe.
They’re still family-run, and they’ve built a reputation for being reliable while focusing on future needs, whether that means using greener materials or training architects through their RIBA-approved sessions.
They often take on projects that are a bit more complicated, such as preserving a listed building’s vaults or creating a basement that feels more like a luxury living space instead of just a storage area.
Their product range is extensive, and since they design and supply everything themselves, you know where the quality control comes from.
People value their deep knowledge and their commitment to sustainable solutions. The downside is that they don’t install the systems themselves, so you’ll need a contractor you trust to make their plans a reality.
Pleasant work
“Newton Waterproofing Systems are our preferred partners when it comes to any type of waterproofing, being basement tanking or any other type of interior or exterior systems. Extremely pleasant to work with, very flexible to match any design requirements and their systems are built to last! Best service providers in waterproofing field!”
- Martin Yordanov, Google Review
Proactive team
“I have had the pleasure of working with Newton Waterproofing on multiple projects, and their service is second to none. Their team is diligent, proactive, and always happy to help, providing expert guidance and reliable solutions. They consistently deliver high-quality results, ensuring complete peace of mind when it comes to waterproofing. Highly recommended!”
- Luke Taylor, Google Review
3. London Waterproofing Solutions Ltd
Address: 39 Marlin Square, Abbots Langley
Contact: +44 20 7458 4655
Mail: [email protected]
Business hours:
- Monday to Thursday, 8AM – 5PM
- Friday, 8AM – 6PM
London Waterproofing Solutions Ltd is a family-run business with over 80 years of combined experience. You can tell they know what they’re doing.
Their team includes CSSW-qualified surveyors, so they don’t just guess at solutions; they also have all the credentials to support their work. They follow the latest standards, and their 10-year insurance-backed guarantee feels meaningful.
Customers often say they explain things clearly, so you won’t be left nodding along without really understanding. They may not be the cheapest option, but their pricing reflects the quality of their work.
They excel on projects that require careful planning and steady hands, rather than quick fixes. For homeowners who appreciate solid technical skills and a team that listens, they’re a name worth remembering.
Reassuring
“Peter came around quickly and managed to get a team in place swiftly. They were incredibly friendly, thorough and reassuring. I’d recommend them in a heartbeat. We received many quote but they were by far the best value. Thank you for your efforts!”
- Pooja Patel, Google Review
Skilled at their jobs
“We have been most impressed by LWS from our initial call to the office, when we were met with a very friendly response, the subsequent inspection by Mark, a knowledgeable surveyor, to the work being carried out efficiently and smoothly by 4 very able and polite technicians, who were evidently skilled at their jobs, worked hard and left the place tidy each day. There followed a thorough inspection and sign-off by Salvo, and finally the very helpful office staff furnished us with all the necessary guarantees and a manual. We cannot praise them highly enough for both their professionalism and also their reassurance that the problem was solved.”
- Patsy Newey, Google Review
4. Preservation Treatments
Address: Belmont House, Belmont Rd, Camberley
Contact: +44 1276 66466
Mail: [email protected]
Business hours: Monday to Friday, 8AM – 5PM
Preservation Treatments has been around since 1972, and they have experienced nearly every type of damp and waterproofing issue a London property can face.
They do not just apply a quick fix. Instead, they assess the entire building to identify the root cause of the problem.
This approach is especially important for older homes or complex structures where a hasty solution could worsen the situation.
Many people comment on how thorough their inspections are and how clearly they communicate their findings. You’ll understand exactly what’s happening and why.
They handle everything from small residential tasks to large commercial projects, adjusting their methods to fit each situation. Their solutions can be more expensive, especially when they suggest extensive preservation work, but they usually focus on long-term results.
If you want a job done properly, they’re worth considering.
Professional service
“I would like to say a big thank you to Preservation Treatments and Andrew Ferguson for a very efficient and professional service. I had a damp survey report that was very precise. The report was produced within a day. I cannot fault them. I have already recommended them to 1 contact and I will keep recommending them to many others. Very cost effective and immensly dedicated.”
- Natasha Peprah, Google Review
Very prompt
“From start to finish, a great organisation to interact with. Caroline in the administrative office was prompt in liaising with us and very helpful.
Our surveyor David was prompt, informative and reassuring. Preservation Treatments Ltd were the only firm we could find who didn’t want to charge us for an initial inspection, this made even better that we were advised our concerns were unnecessary, and no work was required.”
- Nicky Blake, Google Review
5. Universal Basement Waterproofing Ltd
Address: Kemp House, 152 – 160 City House
Contact: +44 20 3795 4900
Mail: [email protected]
Business hours: Monday to Friday, 8:30AM – 5PM
Universal Basement Waterproofing Ltd keeps things simple by focusing almost entirely on cellars and basement work.
This approach pays off. Based mainly in central London, they’ve gained substantial hands-on experience with the quirks of underground spaces.
They know how to choose the right waterproof membrane and install drainage that can handle sudden downpours. Plus, they can tackle basements that other contractors might find too cramped or awkward.
Reviews often highlight how tidy they are once the job is finished. They aren’t the cheapest option, but that’s often the case when you hire a team that spends every day working with the same kind of task.
If you’re planning a basement you’ll actually use and want it done right the first time, their focus could be a significant advantage.
Quick workers
“I had my basement waterproofed by Universal Basement Waterproofing Ltd, and I’m beyond impressed with their service. From start to finish, the team was professional, friendly and extremely knowledgeable. They diagnosed the issues quickly and provided a clear, no nonsense plan for the work. Everything was completed on time and the results speak for themselves. No more damp or leaks, just a dry and usable space! The quality of workmanship is excellent and their attention to detail was exceptional. If you need reliable basement waterproofing, these guys are the real deal. Highly recommended!”
- Jordan Hall, Google Review
Assurance
“A fantastic experience from beginning to end. Workers maintained cleanliness and respectfulness and the finish quality exceeded expectations because communication remained excellent. The completion of our dry space brings us joy alongside the assurance it provides. Definitely a company you can trust.”
- Baxter’s Seven Hi, Google Review