Often on episodes of Grand Designs, the people who take part in the programme are left in awe by the final result.

However, sometimes they can be left sorely disappointed by how a build is looking while in the middle of the development process – such as is the case in tonight’s episode.

In the latest instalment of the Channel 4 programme with presenter Kevin McCloud, viewers will be introduced to couple Graeme and Melanie, and their teenage daughters Isla, 15, and Indi, 13.

While work on the family’s ambitious home in Hackney progresses, the teenagers inspect what will become their basement bedroom… and as can be seen in an exclusive clip shared by Metro.co.uk, they don’t look at all impressed.

The girls head over to the concrete shell of a structure with their parents, and as they gaze down at it, it appears that they’re not feeling too optimistic about the room that they will call their own when the build is over.

‘It looks like a hole in the ground,’ one says succinctly, while the other says dryly: ‘It’s a hole in the ground where we will be living. And that’s about it.’

The future basement bedroom is… a sight to behold (Picture: Channel 4)

Isla and Indi don’t look at all impressed – and they don’t mind showing it (Picture: Channel 4)

The second teenager adds: ‘It’s taken a while, about four or five months, to dig a hole in the ground. We will never see daylight again.’

It’s true what they say – the structure is literally a hole in the ground at this point.

But hopefully by the time that the build on their east London home is over, they’ll feel more comfortable with the overall vision.

The aim of the work on the Hackney home is to begin a new chapter for the blended family.

However, they run into some difficulties from the start.

The family inspect the concrete shell below them (Picture: Channel 4)

The house is made up of a small twin garage plot, with no land around it, which Graeme and Melanie bought for £275,000.

Located on a road of Victorian-style terrace houses, architect Graeme comes up with an innovative plan to make their dream a reality – to maximise the space that they own over three floors, which will include the teenagers’ bedroom in the basement.

With a time frame of just 12 months, the builders have to excavate four metres below the ground to create the underground area.

Aside from the obstacles of creating a three-floor home in a limited amount of space, Graeme also has a particular aesthetic in mind, adopting a modernist style with a bright red-clad design.

Just from hearing about the idea that he has in mind, we’re keen to see how this build plays out.

Grand Designs continues Wednesdays at 9pm on Channel 4.

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‘We will never see daylight again.’