The Channel 4 show is now entering its 26th series, with previous episodes seeing everything from giant curved glass homes to mansions built out of clay and former water towers.
Now, more keen builders are ready to take on the task, as Kevin travels around the UK to see the new builds in Grand Designs.
The first episode of the new series saw artist Sarah with a radical super-sustainable home that combined living quarters with a studio and an art gallery.
Sarah was followed by couple Pete and Aey, who constructed a factory-built house in rural West Sussex.
Marcus and Abi followed the pair with a “luxurious off-grid family home” in Pembrokeshire.
Kevin then met Pep and Malene, who built a modern Viking hall in the Surrey Hills.
Last week saw Piers and Emma build the UK’s first castle in 100 years with their own modern take on the structure.
This week, Kevin revisits Stuart and Rosie from the Wirral, who in 2016 began building their ultra-modern dream home.
Grand Designs revisits ultra-modern floating home
In 2016, Kevin first visited Stuart and Rosie in the Wirral when they set out to transform a small bungalow from a 1960s dormer into a 21st-century architectural design.
The plan saw the pair decapitate the building and balance a new floating timber box on top to create five bedrooms.
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Hoping to spend as little as possible on plumping, electrics and insulation, money fears quickly began to grow.
Stress levels for the neighbours only grew when they faced angry neighbours who were not fans of the ultra-modern home.
Now, nine years on, Kevin is back to see how Stuart and Rosie are getting on.
Grand Designs airs on Channel 4 on Wednesday evenings at 9pm, and is available to stream on All4.