About Us

The UK’s Only Premier Chartered Basement Construction Specialists

Image of Liam Dower

Founded by Chartered Builder and Loughborough University graduate Liam Dower, St Albans Basement brings over two decades of experience in the construction industry. Liam’s background with some of the world’s largest building and engineering firms has laid the foundation for our company’s unwavering commitment to excellence. Under his leadership, we have built a reputation as a trusted name in basement construction, collaborating with leading architects and project consultants to create bespoke, high-quality spaces.

St Albans Basement is proud to be the UK’s only basement construction specialist with Chartered Building Company status. Regulated by the Chartered Institute of Building and bound by the Chartered Building Company code of conduct, we bring unmatched professionalism, integrity, and expertise to every project. From your initial enquiry to the final handover, our team is dedicated to delivering exceptional service and flawless results.

Why Choose a Chartered Basement Construction Company?

Our Chartered Building Company status means we uphold the highest standards of quality and ethics throughout every stage of your basement construction project. This accreditation reflects our commitment to providing transparent advice, meticulous planning, and outstanding delivery, ensuring peace of mind for our clients in London and the Home Counties.

  • Specialist Expertise: As a Chartered Building Company, we bring unique insights and skills to basement construction.
  • Trusted Partnerships: We collaborate with like-minded architects and consultants to deliver exceptional projects.
  • Customer-Centric Approach: We prioritise your goals and ensure open, transparent communication from start to finish.
  • Proven Track Record: With years of experience and countless successful projects, we are trusted by homeowners and developers alike.

From the heart of London to surrounding areas like Surrey, Kent and Hertfordshire, St Albans Basement is the partner you can rely on for your build.

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Waterproofing CSSW Design
Full Turnkey Service
Residential
Design
Value for Money
Fully-trained Professionals
Commercial

Liam and his team were professional throughout the project. We refurbished a Victorian property in a conservation area which had a very dark damp cellar with a low ceiling. It was a daunting project to convert this area into a a beautiful living space. Liam guided us through the planning process as well as helping with the structural engineer. St Albans Basements did such an amazing job that they were engaged by our neighbour to undertake their extensive basement project. We would use them again without hesitation.

Nigel

St Albans Basement were extremely professional and competent from the conception and idea phase right through to the building of the basement and customer aftercare. Throughout the process they were there to assist and drive decisions and were completely transparent from day one. Both Liam and Will are throughly nice chaps too! Highly recommended!

James Riordan

Our property was situated in a conservation area and St. Albans Basement were experienced in dealing with the complications this brings. We would recommend them to anyone who was seeking a basement conversion or installation.

Irnthu Premadeva

Liam and his team completed a fantastic renovation of our basement room. Liam assessed the space, provided the options and gave a clear quote. The room was originally very damp unusable - in addition to the stairs being rotten. We have now been using the room for 10 years as a snug/tv room and we haven’t had a single issue. I would have no hesitation in recommending Liam and the team.

Lee Taylor

We used St Albans Basements to carry out the basement package on a project where we were the main contractor. Liam and his team were a pleasure to work with. Professional, approachable, and extremely accommodating with advice, sharing their expertise. The quality of the workmanship was of a high standard, and they delivered within the set timeframe. I would highly recommend using this company and would definitely use them again in the future. Thanks, Liam and the team!

Shaun Murphy

Liam and his team did an amazing job building our basement. They were all so conscientious and careful about keeping our house tidy, cleaning after themselves every day. Although our basement was built in 2019, we use it everyday and couldn’t imagine our house without it. If anyone is considering getting a basement, I highly recommend St Albans Basement.

Élan Mordecai

We are so pleased to have chosen St Albans Basements to work on our cellar. Their work has been transformative and of the very highest standard from the very start to the end of the project. We are now in the decorating stage - and once that’s done will post some pictures. Our intention is that we will make it look like a modem-day, Victorian-style cinema, if that makes sense. Liam’s design team were always able to bear this in mind when laying out the new room. The high levels of professionalism and expertise, the very regular communication and the attention to detail, in response to our (sometimes quirky) needs was first class. Liam and his whole team are very approachable; and the men doing the ‘hard graft’ were polite, hard-working, cheerful and at pains to always keep everything as tidy and well-ordered as possible so that we could go on with our daily lives in the rest of the house. What we appreciated most … Liam is an excellent project manager and his in-house and extended team are very, very well co-ordinated to make things happen logically, to the highest standards and, importantly, to time. We have absolutely no hesitation in recommending them and, when you see the photos of how our whole experience of being in our house has been enhanced, you will see why. More soon!!

Peter D

Liam and the team transformed our damp cellar into an amazing downstairs music room / den and we would not hesitate to recommend based on our experience. Liam is professional and a pleasure to work with and we found his team to be both hard working and polite. Thanks again for making a complex and difficult job so straight-forward.

Neill McClements

We had a wonderful experience with Liam and his team from start to finish and we’re really happy with our finished project. Both our basement and kitchen extension are perfect. Thank you!! We had a tight deadline because we were due are second baby around the time of the build. We were happily back in our own home on the day our little one arrived

Nicola Robinson

Liam and his team transformed our little damp cellar into three rooms. This involved lots of digging to increase the footprint and ceiling heights, underpinning the house, and fully damp-proofing everything. A year later we had St Albans Basement back to build a side return extension. All of this together has transformed how our family live, and the kids can grow up here without us ever having to move. We're so happy with it all!

Gareth Gibson

Liam and his team converted our basement in our previous house. This involved full underpinning, tanking with membrane and pump, new staircase and finish. The room came up great with a nice high ceiling and was well insulated. From start to finish we were impressed with Liam and his team and it is no surprise to us when we see his hoardings around St Albans. Highly recommend.

Ben Cumming

Liam and the team worked wonders on our basement, a lot of work was required to dig out an existing space and add a new staircase and window into the damp cellar, but the team worked quickly and efficiently in what was a narrow and difficult street to work, in terms of allowing access for skips and deliveries. The basement room is a brilliant family space, and feels airy and temperate. Cool in summer and warm and cosy in the winter. The team were polite and considerate when working around a young family which we really appreciated. Would highly recommend.

Carla Sydenham

If you’re ready to start your basement construction journey, trust St Albans Basement to make your vision a reality. Contact us to schedule a consultation and discover why we’re one of the most respected basement construction companies in London. Let’s create a space that’s not only functional but also truly extraordinary.