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The Independent UK
The Independent UK
Kristy Gray

Can Hull couple turn spooky underground reservoir into a Grand Design?

The idea of transforming an underground water reservoir into a modernist family home probably wouldn't occur to most people. 

But for engineer Richard Bennett, 55, and his partner Felicia Böhm, 45, the concrete structure near the Humber Estuary in Hull presented an opportunity they couldn't resist.

The couple want to build a three-bedroom, open-plan courtyard house from the decommissioned reservoir, which they bought for £98,500. 

"You fall in love with places. I got the idea that it wants to be set free," says Richard of the cavernous subterranean structure. 

Felicia isn't quite so sure when the couple take presenter Kevin McCloud to view their future new home. "I'm not claustrophobic but I think that was the moment I understood people are afraid of being locked up in places like this," she says. "I mean, it's spooky and dark and anything can be down here."

The only way to access the disused structure is via the valve room, with a steep staircase leading down into what Kevin describes as an "otherworldly water chamber," dug four and a half metres underground.

The reservoir's concrete retaining walls provide a ready-made insulated enclosure but add significant stress at an early stage of the project when the couple need to take the roof off to let the light in.

They have budgeted £7,000 for the demolition but have no idea whether the roof is holding the walls up or whether it will bring them crashing down with it — a potential catastrophe they won't be able to afford to fix. 

These unusual design and layout decisions added further stress to the renovation project, which they set out to complete in 2013 within a budget of £150,000.

Grinding down the 450sq m of almost impenetrable reservoir walls also proves to be a monumental challenge, which Felicia takes on herself.

They are planning to leave the walls as the are once they've taken off the top layer of waterproofing treatment.

"It'll always remind us how the tank used to be. It will be the only feature that remains," she says.  

To follow their progress, this episode of Grand Designs airs at 9pm tonight on Channel 4.

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