Executive producer Karen Wilson said the team travelled the “length and breadth of Ireland and the UK” before ending up in the North West, which had “stately homes and Dublin-style streets”.
Wilson said they had to move around more than a TV production usually would.
“Places like Manchester, Liverpool, north Wales, and Yorkshire gave us what we needed,” she said.
“I really hope we’ve done Dublin justice.”
Ceri Williams, general manager for Penrhyn Castle, National Trust Cymru, said it was “great” to host the series which “explores wealth, class disparities and conflict, similar to the themes we explore here at Penrhyn”.
The trust’s website says Penrhyn Castle’s “formidable architecture, opulent interiors and fine art collection lean on a long history of sugar and slate fortunes, social unrest and the longest-running industrial dispute in British history”.
Owned by the Pennant family, its says Penrhyn is a “key example of how wealth derived from slavery shaped the built environment of Wales” as it was created within sight of the slate quarry they created and a port which sent their products by ships around the world.
The House of Guinness launched on Netflix on 25 September.
