Shell and Core Specialists

Basement Builder – The Original London (And now National) Basement Company

Highest Quality Finishes

Basement Builder – We Only Use the Highest Quality Fittings and Materials

Innovative Design

Basement Builder – We have In-House Architects and Qualified Structural Engineers

Industry Leaders

Basement Builder – We have the Fastest Turnaround, and Deliver 5 Star Service Everytime

Convert or Construct a Beautiful Basement…

Here at Basement Builder, we are an approachable, friendly team and as general manager, I take personal pride in ensuring that we serve you to the highest standard for the duration of your project. I am personally available to discuss your project in our offices where we can discuss your project in depth. Of course, you can email or call myself, or one of the team at any time too. We look forward to meeting you and I’ve been told I make a great cup of coffee. So contact us now to kickstart your project.

ANDY WALKER, General Manager



We always have different types of basement construction projects being undertaken at the same time, including retrofit basements, basement excavations, basement digouts, basement extensions, basement underpinning, and basement conversions.


Have an online chat with us to discuss your specific requirements.


We can transform your home for less than you imagined.




Why We Are Different

Well that is easy: We are Engineer-led. This means that every Basement Builder project is overseen by a qualified structural engineer from the very first design chats, to the last wipe-down from the clean up team. This offers various benefits not least of which is a reduction in cost.

We don’t have to outsource any stages of the projects we undertake as everything is done in-house. Architects, Structural Engineers, Surveyors, Legal Advice and even our very own Subject Matter Expert team for radio and TV interviews – all operate from our Head Office.

A further benefit from having everything in-house is speed – it is a lot easier to call across an office to get results, than have to wait on hold for answers.


Useful Information

New Build Basement

New Build Basement

A new build basement is often confused with a basement that is new to an existing property. You know, a property exists but more space is needed so we will build a brand new basement for the property. This is incorrect. A new build basement is attached to the words...

Design Contractors

Design Contractors

So what exactly are design contractors and why would I need one as opposed to my local builder who can arrange everything for me? We love local builders, in fact we often work alongside them on construction sites across the nation, where we are different to these...

What does Basement Membrane Do?

What does Basement Membrane Do?

So here it is: What does basement membrane do? Well at Basement Builder we don't only answer the question of what it does, we also have the experience to answer any questions surrounding what that same membrane does on different surfaces. See our sister post on...

Basement Conversion

Basement Conversion

Basement Conversion When Victorian properties undertake a basement conversion, this normally requires the property being underpinned. Basement conversion underpinning is a common scenario that is normally a requirement to obtain the required additional headroom. The...

Victorian Basement Conversion

Victorian Basement Conversion

In this article, we are going to talk about Victorian property development, how to know if your property is of Victorian descent and the to achieve a Victorian basement conversion. If your property was built during the reign of Queen Victoria (1837-1901) then your...

Circular Underground Wine Cellars

Circular Underground Wine Cellars

If you're a fine wine connoisseur or collector, you may have been storing your precious wine incorrectly! Wine is a living product, the ideal temperature for wine is 13-5°c, and a constant humidity of 70% is required to keep the wine as stable as possible. Wine likes...

Got Drawings to Send Us?

We can handle drawing sets up to 30mb, if you have a larger set of drawings, please send them via WeTransfer

Free Basement Consultation

Save 10+ Hours of Research – We Advise on Everything You Need on your Basement Journey