Conversion of townhouse basement into a modern living space

Completed: 2022

Structural and ground works

The conversion of the basement included several structural changes to provide internal and external access and significantly improve natural lighting.

The extent of the structural changes required the introduction of several elements of steel work and the creation of suitable footings and support column. This was particularly challenging as the original building is of an age that predates modern concrete foundations.

To create the desired living space with suitable thermal properties and damp-proofing / tanking, it was necessary to remove the brick work flooring and reduce the levels throughout the basement.

Preparation and pouring of new concrete sub-floor

Creating a strengthened sub-floor, and forming drainage channels that are part of the tanking system was an important phase of the project, necessary prior to further structural works.

External staircase construction

The forming of a staircase was desired for several reasons. As well as meeting fire exit requirements, it also provides convenient access to the existing patio and garden areas, as well as creating an additional source of natural light.

From a construction perspective this was a significant phase presenting many challenges as the bottom of the stairwell also houses the drainage sump-pump/backup system that ensures rainwater is appropriately dealt with,

The pouring of the stairwell concrete walls required specialist pumping equipment in order to get over the top of the three storey townhouse.

Damp-proofing / tanking phase

Although the basement did not have an original issue with damp ingress, it is always a sensible step to include a suitable tanking system when carrying out significant improvements.

The damp-proofing applied is part of a designed system that ensures any damp does not enter the living space. Instead the system allows external surfaces to breath and where necessary drain to the sump pump.

Internal staircase & framing

Providing internal access with a statement floating staircase was a key design element sourced and installed by TBMC.  To support the staircase it was necessary to introduce additional structural steel work, that also provided the benefit of shoring up an existing internal wall.

The images also show the metal frame work being installed upon which the plaster-board walls were installed.

Decorating, internal joinery and fittings

As the project nears completion, decorating and second fix joinery to create bespoke hidden cupboards and and step/panelling to the raised children's play area.

To make full use of storage areas, recessed shelving was also constructed, prior to the installation of the bespoke wooden staircase treads that included provision for under-tread lighting.

Completed basement conversion

The project was completed early in 2022, providing a contemporary living space with plenty of light.

The project saw TBMC working closely with architects, engineers and of course the home owner to overcome necessary additional works as well as client design changes, to achieve a high-end finish that we are proud to have appointed to deliver.

Client Testimonial

“We entrusted a complex basement project to Matt and the team at TBMC and we were delighted with the results. We were impressed by the quality of the work, the attention to detail and the high level of client interaction as the project progressed and indeed after it had finished. We would be happy to recommend TBMC.

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