We have 20 years' experience constructing basements below or near to existing buildings and have completed over 250 basement projects in that time.

Basement Construction in London

If you are thinking about building or converting a basement below your London property, to create extra space in your home, the first you will need to think about is the actual structure and waterproofing of the space.

At Basement Force, we undertake various basement projects throughout all areas of London, and specialise in basement construction such as the structural and waterproofing works.

The last thing you want is to extend your home with a brand new and modern basement, and find that it has been poorly constructed. Having a poorly constructed basement structure can cause an array of issues such as unstable foundations, water damage, pest problems, and more.

This is why our team specialise solely in constructing basement structures and waterproofing. This has allowed us to become experts, so that we can be sure we are providing each one of our clients with the best quality service; preventing issues arising later on.

Our team has over 20 years' experience in providing London properties with the core structure for their new basement. We work either directly with you - the homeowner - or with your architect, designer, or engineers. Either way, we will always discuss exactly what you’re hoping to achieve from your basement construction, to ensure you're getting exactly what you envision.

Free Site Survey 

Health and Safety

Basement Force were the lead authors on the ASUC (Association of Specialist Underpinning Contractors) publication:

"ASUC Guidelines on safe and efficient basement construction directly below or near to existing structures."

These guidelines were consulted on and endorsed by the Health and Safety Executive.

Our Process to Prepare for Basement Constructions

We will carry out an initial site investigation, so that we are aware of what we are working with and if the property is currently suitable for a basement construction. This will allow us to investigate such as, the soil type and condition, existence of watercourse, location of drains, any ground contaminations, and will let us assess whether there are any risks of movement.

Depending on the circumstances of your property, we will submit any necessary documentation to the Construction Traffic Management Plans (CTMP).

A Construction Management Plan (CMP) will be put together at the start of a project to map out all necessary details required for us to be able to complete the basement construction.

A method statement, also known as safe systems of work, is used to outline how the work on the project will be carried out safely and without risks of health.

If any temporary works are required in order for the finished project to be completed, we will put together designs to detail the temporary works and their designs.

A party wall is a wall extending across the boundary of two or more homeowners. A party wall agreement is used to manage the relationship between homeowners with a common boundary. We will provide support in the party wall agreement process, if this is necessary.

Photo of basement project

Main Basement Construction Works

Each basement construction project we carry out throughout residential properties in London, we will always carry out a thorough investigation and put together plans and guidelines to ensure we are building the highest quality basement structure for your home. This will establish the best possible framework to enable you to design and create your new basement.

Photo of basement project

The main works we carry out include:

  • Above-ground temporary works
  • Ground stabilisation
  • Structural steelworks
  • Suspended reinforced concrete slabs
  • Reinforced concrete beams
  • Excavation and disposal of soil
  • Below ground drainage
  • Waterproofing & groundwater control

Send us an enquiry

Other Services