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Basement Conversion London | Master Build Team Ltd

Basement Conversion in London

Space in London comes at a premium, so adding a new basement to your home not only adds valuable living space but it also significantly increases the value of your property.

When most people think about adding space to their home, they immediately think of extensions or loft conversions. But a basement conversion is a lesser-known solution to maximise your home’s footprint.

Trusted Basement Excavation Experts​

At Master Build Team Ltd, we have worked hard to earn a prestigious reputation throughout London for our basement excavation and underpinning services.

Our experts have over 10 years’ experience in the construction industry, and we pride ourselves on having some of the very best basement contractors in London on our team.

We’re committed to supplying our customers with high-quality underpinning and basement services that are delivered on time, on budget, and at a competitive price.

We work with our clients to provide them with a comprehensive service that’s tailored to their specific needs. Whether you already have a cellar and are looking for a conversion or have a new build with no basement at all, we can provide the best solutions.

How Do Basement Conversion and Excavation Work?

As a rule of thumb, the deeper a basement, the more expensive the project. But in London, the increasing cost of property means multi-storey basements, below-ground parking, and other basement projects are more than justified and a creative solution to expand.

Depending on the size of your property, the amount of excavation required, and the complexity of the project, constructing a basement will take around 12-20 weeks.

A commercial excavator is used to dig down under the house. All excavated material is brought up and transferred into a skip to be disposed of. As the basement takes shape, the foundations are underpinned and the walls are reinforced, slowly transforming once solid ground into a brand new basement.

Basement conversion in London may seem like a disruptive project, but it can be done with minimal disruption to your family and we ensure the project is completed in the shortest time frame possible.

Basement Construction

Whether you are looking for a brand new basement or a cellar conversion in London, our team of experienced builders can help. However large your basement excavation project is, we have the manpower and expertise to take on projects of any size.

We strive to exceed expectations in all areas of our business, whether it’s for residential, industrial, or commercial properties. Our experience means we can bring innovative and cost-effective solutions to basement construction projects. From planning permission all the way through to the finishing touches, we can handle the entire project and make the process seamless.

If you own a commercial property that already has underground storage, we can help convert it into a functional room that helps grow your business.

Cellars are often underutilized in commercial properties. But with expert advice on flooring, insulation, storage, and more, we can help you turn it into a usable area.

If your commercial property doesn’t have a basement but you desperately need more room for storing stock, we can create a large basement that’s perfect for storage and other uses.

Commercial properties

Solutions for all types of homes

If you own a residential property in London, you’ll know first-hand how valuable a basement project could be.

There are a wide variety of methods we can implement to fit the needs of our customers, and our teams will discuss these with you in the planning stages. Whether you have a period townhouse or a new build, there are options available to give you a new basement and boost the all-important living space.

In many cases, we can retrofit a basement based on your specifications by excavating under the house. This can be done without interrupting your day-to-day living and you don’t need to have an existing cellar. This hassle-free process can be completed to any size you require.

A basement excavation can sound like a messy project, but you’ll be surprised how minimal the disruption can be to your home. If you’d like to find out more about the process of creating basements, feel free to contact us and ask any questions you have.

If you’re wondering if your home is suitable for a basement excavation, a member of our team can come and assess your property and let you know your options. Even if your home isn’t suitable, our team may be able to find other creative solutions to give you the living space you need, for example, loft conversions or glass extensions.

Under House Basements


The Master Build Team Ltd team can construct multiple level basements, meaning you have the freedom to create a space that works for you. Because you’re not restricted to a single level, you don’t have to sacrifice living space to create an additional functional room.

Many people believe that if their home already has a below-ground level, a basement isn’t possible. However, a sub-basement can give another layer of functionality to your home and significantly more space.

Using open excavation techniques, we can provide you with a basement that runs under your garden. This is ideal for those who don’t want to excavate directly under their property or those who want their basement to extend beyond the blueprints of the house.

Under garden basements are not only functional but also look incredible. This style of basement can be fitted with a glass ceiling window to flood the room with light while adding a fantastic architectural feature to your garden.

If you want to increase the living space in your home but don’t want to lose precious outdoor space by adding large extensions to your house, an under garden basement is a great option.

Under Garden Basements

A 10-Year Guarantee

We’re proud of the services we offer and are confident that we’ll provide the highest quality possible on our basement projects. That’s why we have a 10-year guarantee on all of our basement projects. Not only does this give our customers total peace of mind, but it also means a good proportion of our business comes from recommendations from happy clients. We aim to be one of the most trusted basement specialists in London, which is why we go above and beyond for our customers.

No need to stress about a planning permission

We have years of experience dealing with building regulations, safety standards, and planning permission in London. We can help you through the entire process to take the stress of this initial stage of the basement conversion project off your shoulders.

Contact us today!

If you’re ready to add more functional space to your home in London, contact us today to get your project started. We can arrange a free visit where one of our builders will come to your home and give you a free assessment.

They will discuss your needs and give you the best basement construction options available. Whether that’s a basement conversion, new basement excavation, or garden basement, we can talk you through all the options that will work for your home.

Our experts can give you a free quote for the project, talk you through every step of the process, and provide estimates on cost and timescale for your basement project.