Expert Basement Builder in London
for Conversions & New Builds

Specialists in basement conversions, underpinning and waterproofing across West and North London.
Full design-to-build service with guaranteed results.

“NO HEADACHES” CONSTRUCTION

We deliver fully managed basement construction and conversion projects across London, including West London and North London.

From structural design and underpinning to excavation and waterproofing, our team handles every stage with precision.

HIGH-QUALITY CRAFTSMANSHIP

Projects with Basement Shell are professionally managed, with basement construction and conversions delivered to consistently high standards.

From structural work through to the finishing details, you have the flexibility to create a space that suits your needs from clean, practical layouts to high-end luxury basement interiors.

QUICK & EFFICIENT COMPLETION

You might be surprised at how quickly you can start enjoying your new space. We focus on delivering fast, efficient basement construction and conversion projects without compromising on quality.

Our structured build process and careful scheduling allow many basement projects to be completed within 10–12 weeks, depending on the scope of work.

About Basement Shell

Basement Shell has extensive experience in basement construction, delivering high-quality, innovative basement designs that meet and exceed our customers’ expectations.

Our in-house approved basement contractors understand how to maximise the value of your property while providing a personal, hands-on service. We offer a full design and construction solution, including basement structural design and calculations, basement underpinning, basement excavation and basement waterproofing for both commercial and residential projects.

As experienced basement builders in London, we focus on delivering safe, compliant and long-lasting basement conversions tailored to each property.

Why you should choose us for your basement conversion:

Basement Projects Done
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We create places that deserve to be called home.

We strive for the absolute best in every basement project, big or small. Have a look at our previous projects.

Interior Of Basement With Pool Table in West London Home
Design
With a highly experienced and proven design team around us, including Architects, Engineers and Interior designers...
A new stick built interior construction basement renovation and remodel
Health and Safety
Health and Safety is always at the forefront of our minds here at Basement Shell...
Modern basement conversion in London home
Construction
As experienced basement building contractors, we will supply clear and detailed quotations for all of the work...
Roll sheets of waterproof fabric used for waterproofing basements
Waterproofing Stage
Waterproofing is always at the forefront of our minds here at Basement Shell...

Convert or Construct a Beautiful Basement with Basement Shell

Work with trusted basement builders specialising in basement conversions across West and North London. We handle everything from planning to final construction.

Request your FREE quote

Step 1

Let's Meet

Let's Meet

As part of the first stage, a Basement Shell surveyor will visit your home to carry out a site survey. During this meeting, they will be able to advise on what type of basement conversion and layout is feasible for your home as well as take essential measurements required for your quotation.

Step 2

Design & Plan

Design and Planning Process

Once the contract is signed and if required, a member of our architectural team will visit your home to complete a survey, take the measurements and produce a set of plans. We can also help with structural calculations and submitting your plans through for planning permission. If you have appointed your own architect and dealt with the planning permission already, we are also happy to quote for the construction part only of your basement conversion.

Step 3

Build

Build

Once you have the planning permission in place for your basement conversion, the construction phase can begin. A basement conversion can take a number of months to complete depending on the size and level of fit out required inside. On average it can take between 6 – 10 months to complete a basement conversion. You will be assigned a dedicated site foreman for the duration of the project who will arrange regular meetings to review progress and keep your project running to schedule.

Finish

Completion

Completion

Once your basement conversion is complete and you are happy, Basement Shell ensures that you are issued with all relevant certification including building control completion certificates, and also details of our ten year guarantee plus our 30 year warranty on any delta membrane systems we may have installed.

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