The hit Channel 4 architectural show Grand Designs sees ambitious individuals build their dream family home, and this week's episode is no different.

In the first week of the new series, Manchester couple Colin and Adele learned the hard truths and the dos and don'ts of building their curved glass mansion.

The second episode in the series saw Tunbridge Wells-based Kate and Rob replace their rundown post-war prefab home that stood the ages and lasted a lot longer than expected.

After that, Canterbury-based couple Dorran and Vereuschka build an underground hidden home but trouble arose for the pair after they parted ways with their contractor and took on the project themselves.

They were then followed by Hertfordshire couple Matthew and Davidzo who built an Australian and Zimbabwean-inspired home on the sloping hills of the Chess Valley.

Derbyshire couple Mike and Sarah sought to create a medieval longhouse-inspired build in the week after with hopes to bring the family together.

Bedfordshire couple, John and Helen were next as they built a modernist pavilion with a £1.3 million budget to create a comfortable and accessible life for the pair. 

They were followed by London-based Corinne who attempted to create an impressive yet awkward extension as she looked for a fresh start following a few difficult years. 

The return of the much-anticipated re-visit of the North Devon couple who hope to build an impressive lighthouse-inspired home came right after that.

Followed by a revisit to Somerset couple Vicky and Ed after they built their home on their own from a derelict cowshed. 

Finally, last week saw the re-visit of a Bolton couple as they built a fortress-like home on the southern edge of the West Pennine Moors.

Now, this week sees a re-visit that has taken more than two decades, after the project first began in 1999.

Grand Designs revisits Devon from 1999 renovating 18th-century barns

This week, Kevin will revisit Sue and Martin who first began their build back in 1999 when they planned to renovate two 16th and 18th-century barns. 

However, the pair didn't use conventional plans and surveys and specifications saw the project delayed multiple times. 

With an original dealing of Christmas 2000, the build was still not finished by September 2002.

Now two decades later, Kevin is returning to Devon to see if Sue and Martin finally completed the project. 

You can watch Grand Designs at 9pm tonight on Channel 4 and All 4.