The 5 best basement waterproofing services in London that’ll keep your home dry
I’ve been seeing tons of TikTok videos lately of people sharing their horror stories about mould, like how it’s messed with their health and taken over their homes.
Honestly, it freaked me out a bit because our basement has started showing signs of mould too, and it’s one of my main workspaces.
So when my team and I got the task of finding the best basement waterproofing services in London, we didn’t hesitate. If you’re in the same boat and want to stop that mould growth or worse, a flood, you’re in the right place.
| How much does basement waterproofing cost in London? Basement waterproofing in London typically costs between £2,000 and £5,000, depending on the size of the area, the type of waterproofing system, and the complexity of the job. For more extensive work, the price could be higher. |
1. Dampstar
Address: 520 Chiswick High Rd., Chiswick
Phone: +44 7376 700073
Business hours:
- Monday to Friday: 8 AM – 5 PM
- Saturday: 9 AM – 5 PM
- Sunday: Closed
Dampstar has a strong focus on tailored solutions. They adapt their services to each property’s individual needs, which is really important.
One thing that really clicked with us was how they don’t just aim to prevent dampness, they actively work on solving the root cause.
That means things like condensation, rising dampness, or more serious structural moisture damage aren’t just patched up temporarily. Instead, they look at the big picture and use modern systems like cavity drain membranes, sump pumps, and tanking.
These keep basements dry and usable. We love that their approach isn’t just damage control, but proper protection.
We also came across clients mentioning how easy it was to communicate with them. They keep in touch via WhatsApp, which makes the process feel way more relaxed and accessible.
Someone even pointed out that the team was super punctual and stuck to the agreed schedule without any surprises.
That said, there’s one thing they could improve. We think they’d come across as even more trustworthy if they showed a bit more of their past work on their website.
Seeing real examples or even some before-and-after shots would go a long way for people who are trying to weigh their options.
The works were completed ahead of time
“Excellent customer service. The works were completed ahead of time. All the mess was taken away. I will receive a guarantee for the work. Dampstar came around to check my house for damp spots. They negotiated on like-for-like quotes. The company has been established for many years and knows what they are talking about.”
Manjit Bance, Google review
Very impressed with the level of service & attention to detail
“Very impressed with the level of service & attention to detail from Dampstar. Andrew responded to my initial query quickly& arranged to survey my damp walls. His investigation & finding the root cause of the damp was spot on. Work was done neatly & with care. So happy to be rid of mould & damp. Highly recommend Dampstar!”
Charlene Govender, Google review
2. BCW Basement Construction and Waterproofing
Address: 112 Netheravon Rd, Chiswick
Phone: +44 7520 665321
Business hours:
- Monday to Friday: 8 AM – 6 PM
What’s unique about BCW Basement Construction and Waterproofing is that they don’t just seal basements, they build them from scratch too.
For us, that says a lot. It just shows that they understand how a basement should be built from the beginning, helping them fix water issues more permanently.
We also like how they don’t treat every home the same. They take time to look at the type of soil, the layout of your home, and what you want to use the space for. It’s not just about fixing a leak, it’s also about making the space work for their clients.
One client told us how BCW turned a dark, damp basement into a warm, useful living area. This story really showed us that the team thinks beyond just stopping leaks.
They also handle a lot of services, besides waterproofing. They also take care of the digging, steel framing, and roofing. They can even help with the paperwork.
It’s really convenient to have all of that under one roof.
That said, a few clients mentioned that BCW isn’t the cheapest option out there, probably because of how much they offer. So if you’re on a tight budget, they might not be the best fit for you.
Great expertise and quality of work
“When it comes to basement waterproofing, this company is the best in the business. Their expertise and quality of work ensure that our basement stays dry, even during heavy rains.”
Melanie, Google review
Their team was professional, carefully planned and executed the work
“This company did an amazing job building my basement. Their team was professional, carefully planned and executed the work. The new basement is spacious, solidly constructed and perfectly suited to my needs.”
Dhruv Jain, Google review
3. Universal Basement Waterproofing LTD
Address: Kemp House, 152 – 160 City House
Phone: +44 20 3795 4900
Business hours:
- Monday to Friday: 8:30 AM – 5 PM
Most waterproofing companies just focus on applying a waterproofing membrane and calling it a day, but Universal Basement takes it much further.
They strip the entire basement back to its bare bones before they start waterproofing. This means the materials are being applied to a clean surface, which helps the system work better and last longer. We don’t see that kind of detail from most other companies.
We like that they handle everything from the waterproofing to the actual renovation. So if you’re turning your basement into a bedroom or home cinema, they can take care of all of it.
Having one team manage the whole job means fewer delays and no finger-pointing between different contractors.
We also found out that they’re certified installers for some of the top brands in the waterproofing industry, like Delta Membranes, Koster, and Sika. That means their work is backed by solid warranties and support.
However, since they offer such a complete service, their pricing is a bit expensive. If you need a basic fix or a quick membrane installation, their full-on approach might be more than you need.
They diagnosed the issues quickly
“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!”
Jordan Hall, Google review
I find them to be a very professional and diligent company
“I have known Universal Basement Waterproofing LTD for over 10 years now and have found them to be a very professional and diligent company. They take pride in the services they offer and have always striven to ensure that projects are completed on time and to the highest possible standard. I am happy to promote them for any waterproofing, concrete repair or refurbishment projects. A credit to the industry.”
Alex Lynn, Google review
4. OBS Basements LTD
Address: 3rd Floor, 86 – 90 Paul St
Phone: +44 7594 954319
Business hours:
- Monday to Friday: 6:30 AM – 6 PM
- Saturday: 7 AM – 6 PM
- Sunday: Closed
OBS Basements has been around for over 10 years, so we were very intrigued by what they can really offer.
One thing we love about them is that they don’t just add waterproofing as an afterthought. They make it a key part of their basement projects from the start.
Their system often includes concrete piling, tanking, and proper drainage to create a solid and watertight foundation right away.
They also install sump pumps as part of the design. This tells us they think about long-term moisture management, not just stopping leaks in the short term.
We’ve all heard stories about waterproofing getting overlooked until there’s a problem down the line. But OBS makes sure that doesn’t happen by providing a 10-year insurance-backed guarantee on their waterproofing work, which we appreciate.
In terms of cost, their pricing is not cheap. They charge around £1,750 per square metre for excavation and waterproofing to a watertight shell. But considering the solid system they’re putting in place, we think it’s a fair price for the peace of mind you get.
Quote was clearly itemised, very transparent, and stress-free
“OBS were fantastic from start to finish. They were able to begin work within a couple of weeks of our first meeting. They quoted an overall fee which covered everything, so no hidden extras! It was also clearly itemised, so the billing was just very transparent and stress-free. They organised every aspect of the project, including getting the steel frame fabricated, the skip, the electrician, deliveries, and various other moving parts. The workers were professional, skilled, on time, friendly, and flexible. The overall quality of work and customer service was fantastic. We also felt like we got good value for money. We would highly recommend OBS to anyone renovating their basement.”
James Smith, Google review
Their team is hard working, friendly and accommodating
“I have used OBS to carry out two basements for me in the last 5 years and have found them to be very hard working, friendly and accommodating on both jobs. David (business manager) is a pleasure to work with, and Kendall (business owner) makes sure he is in regular contact to check in that everything is going OK. The guys on site bend over backwards to be helpful. Through no fault of theirs, the first job ran into difficulties when the main contractor left the site, but they carried on regardless to deliver their portion of work on budget and on time. Thank you very much, Kendall, David and all the team. I hope to use them again in the years to come.”
Andrew Dangerfield, Google review
5. City Waterproofing LTD
Address: 1, Orchard House, County Grove
Phone: +44 20 3633 2539
Business hours:
- Monday to Saturday: 8 AM – 5 PM
- Sunday: Closed
We loved City Waterproofing LTD because of how thorough they are. Instead of just jumping in to fix the problem, they actually take time to figure out why the damp is happening in the first place.
One homeowner we spoke to said the team explained everything clearly during the initial. They discussed things like where the moisture was coming from to what could be done to prevent it in the future.
They also offer a wide range of services besides waterproofing, including basement tanking, rising damp treatments, and timber preservation.
Clients also mentioned how tidy and respectful the team is while working. Many people said their homes were left clean, with minimal disruption, and even praised the finishing touches like the quality of the plastering.
We’ve also heard that they use eco-friendly materials, but there’s not a lot of detail about which materials or systems they use.
If you’re someone who’s big on sustainability, you might want to ask them about this when getting a quote.
That said, their work is covered by insurance-backed guarantees. They also meet all the proper building regulations, which is reassuring.
The quote they provided was upfront and reasonable
“Armond and his team were super professional and friendly. The quote they provided was upfront and reasonable, and the communication from Armond was fantastic. The work was completed quickly and to a great standard, and our home was left clean and tidy when we returned with minimal disruption.”
Sophie Farrier-Armson, Google review
Done promptly and to a very high standard
“Armand was very professional and responsive, which was reflected in the work his company carried out for me. It was done promptly and to a very high standard, and was fully documented for me to see.”
Joe Sharp, Google review