When you have spent five years creating one of the most impressive new homes ever built in the North East, you want the interior to live up to the £6.75m building.

And when that interior includes a cloverleaf-shaped swimming pool with mother-of-pearl tiles, a nine-car garage and a private gym, only the best in furnishings and design will do.

That’s why Alex Williams, the youthful project manager at Runnymede Mansion in Darras Hall, Ponteland, called on Barker and Stonehouse for expert help.

Alex – whose parents Paul and Carole Williams own the house – got involved in project-managing its multi-million pound construction when he was just 18 years old.

Five years later, Runnymede Mansion, with its seven bedrooms, handmade kitchen, marble-floored lift and billiard room, is finished to perfection and has been put on the market while the family pursue new business opportunities in Barcelona.

The house stands in more than three acres of manicured gardens which run down to the River Pont. It’s the largest – and possibly the most luxurious – home in the entire neighbourhood.

Alex and his family took plenty of time settling on special features such as the bespoke chandelier that hangs over the pool and its eight-person jacuzzi. The house also boasts a cinema room with luxury reclining seats, and a wine room with curved seats overlooking the garden.

For Alex, who says he has enjoyed every minute of seeing the mansion come to completion, it was crucial that when furnishing the magnificent house he reflected its true nature.

“The house has a traditional look on the outside, but we’ve gone for a modern twist inside – and it was important for us to make sure that first and foremost it felt like a home,” he said.

And with such a huge task on his hands, Alex asked Barker and Stonehouse to handle the important job of designing and fitting out the home to be the perfect place to live.

“I was well aware of Barker and Stonehouse and their reputation for excellent customer service, and I love everything they’ve done,” he said.

Step forward B&S interior designer Trish Ridley who worked with Alex on the project to make sure their dream home was perfect on the inside and out.

“The house has an elegant and contemporary design theme that complements features of the building such as the spectacular sweeping staircase.

“My main concern was comfort – style and show-stopping good looks are natural with this sort of property but the family also wanted the house, while large, to feel homely – somewhere comfortable to come back to after work and relax watching TV.

“We worked hard to source the right furniture to achieve this including many individual and bespoke items – including the impressive dining table

“I particularly like the Duresta sofas, and the dining table,” said Alex. “I live in the house at the moment and it’s fantastic – I’m biased of course!”