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

Basement Construction Basics

Basement Construction Basics

These basement construction basics refer to retrofit basement specifically. We have written at length about new build basements, so here is a post about basement construction basics in an existing property. You may be surprised by the amount of times we have been...

How To Create A New Basement

How To Create A New Basement

We have written at length about new build basements, so here is a post about how to create a new basement in an existing property. You may be surprised by the amount of times we have been asked to give advice on building a basement on a first floor property. I am not...

New Build Basement And Cellar Construction

New Build Basement And Cellar Construction

A new build basement and cellar construction is often confused with a basement or cellar 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 Flooding

Basement Flooding

Basement flooding is more common than you'd think. Water has a sneaky way of getting in and often nowhere near where you'd expect. In a basement, condensation occurs naturally and gathers up around the base of the walls of the basement. As this collection grows, it...

Basement Costs

Basement Costs

All you need to know about basement costs. So you have been thinking: We need more space. Looked out the back and both sides but there is not much to work with there. As with many London properties, when your house was built, the developers used every inch that they...

Basement Information Centre

Basement Information Centre

Here at Basement Builder, we operate as a Basement Information Centre. We are happy to give out information that will assist you in one of the biggest purchases you will make in your lifetime. Based on many years’ experience and hundreds of successfully completed...

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