Basement Construction Projects

Take a look at some of the basement construction projects we’ve been involved in around London and the Home Counties.

Interested in finding out more about how we work? Contact us to arrange a visit to see us working on our current projects, or see our basement showroom in St Albans.

Contact us on 01727 370 874 or

Refurbishment, Basement Construction & Ground Floor Extension – St Albans

  • The master bedroom features an en-suite with wet room
  • The master bedroom features French doors leading out to a light well with a courtyard area
  • The third bedroom serves as a nursery
  • Above ground, the kitchen and dining area have been created to bring maximum daylight through the roof windows

This Victorian end-of-terrace property situated in St Albans within a conservation area provided little opportunity to extend externally. We were tasked with turning its ground floor and basement into a home suitable for a growing family, with substantial living space, a premium finish and modern features.

Extending the property created two new double bedrooms, one with en-suite and a full-length light well, a nursery and also provided a family bathroom. Above ground, we extended and renovated the ground floor, turning the property into a space that’s perfect for a growing family.

The home is now a modern, light-filled family space with many premium features including underfloor heating, a wet room and bespoke storage. The kitchen has a bi-folding aspect to the rear landscaped garden, featuring a glass light well.

Type Info
Usage Three bedrooms, one with en-suite, bathroom, kitchen/diner, lounge
Area 100m²
Project Time 8 months

Retrofit Basement – Hammersmith, London

  • Light well
  • View of the stairs from the bedroom
  • Bathroom doorway
  • Bathroom

With a growing family, our client needed additional space. The property had no existing basement, we were appointed to construct a new basement. The basement added over 35m² of additional living space to the home.

The new basement provides a master bedroom, walk-in wardrobe and large bathroom. We constructed a full-height light well that blends seamlessly with the property’s façade, provides ample natural light and creates an airy feel in the space. To ensure the space stays dry and damp-free we waterproofed the basement with a pump system and Delta’s Membrane System.

Type Info
Usage Bedroom, Bathroom
Area 35m²
Project Time 16 weeks

Retrofit Basement – Richmond, London

  • Lounge
  • Playroom
  • Office
  • Bathroom

This family home has doubled in size, with the addition of a light, bright and spacious subterranean floor. The use of lightwells and ceiling windows has transformed this period property into a large modern home.

Hidden underground is an amazing 100m² of additional living space. With a ceiling height of 2.6m, the floor to ceiling windows ensure natural light floods in. It is hard to believe that this area has been created underneath the original property. We were appointed to create a new living area to include an office space, family bathroom, media room, playroom, utility room, a guest bedroom and a storage area to house additional utilities.

The ceiling of the original hallway was replaced with roof light windows to create a sense of space and airiness. The light streams in from the hallway, through the glass staircase and enhances the already bright basement area which has additional natural daylight from the newly built lightwells.

Type Info
Usage Office Space, Bathroom, Media Room, Playroom, Utility Room, Guest Bedroom, Storage Area
Area 100m²
Project Time 8 months

New Build Basement – Hadley Wood, North London

  • Subterranean Car Lift
  • Swimming Pool
  • Rear View
  • Rear View - Light Well

This new build basement construction project provided the house with state-of-the-art leisure facilities including a swimming pool, spa area and hidden subterranean car lift.

The project involved installation of contiguous 350mm piles to both sides of the property and construction of RC in-situ capping beam in preparation for the 5.5m basement excavation.

Type Info
Usage Swimming pool, Spa, Subterranean Car Lift
Area 216m²
Project Time 26 weeks

Retrofit Basement – St Albans

We were originally commissioned to renovate this Conservation Area cottage in 2014. Following the success of these works we’ve been reappointed to undertake a basement excavation beneath the building.

Work is currently underway to create an additional 25m² of living space that will add a luxurious bedroom and bathroom to the property.

Type Info
Usage Bedroom, Bathroom
Area 25m²
Project Time 24 weeks

Retrofit Basement – Primrose Hill, North London

We were commissioned to construct the basement structure beneath a three-storey Victorian Town House within a conservation area.

We added underpinning to the property and constructed a basement below the house and rear garden with a light well to create a beautiful, light-filled space.

Type Info
Usage Gym, Nanny Quarters, Wine Cellar, Living Room
Area 200m²
Project Time 52 weeks

Retrofit Basement – St Albans

It’s not just the view over the lake and nature reserve of this beautiful St Albans cottage which provides a wow factor, but also the new 35m2 basement, which lies hidden beneath.

Our client, a young professional couple, approached us to provide additional living space for their future. While their plans for the space were undecided, we created the basement shell and waterproofing, letting them fulfill their dreams when the time is right. The space is flexible, the current proposed use is as a cinema room and bathroom, although this may change in the future. We’ll keep you posted!

Type Info
Usage Cinema Room, Bathroom
Area 35m²
Project Time 8 weeks

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