An 18th century-style Palladian mansion, Basildon Park in Berkshire is used as the location for the grand Featherington ball in the season 2 "Bridgerton" finale. The ball took place across the garden room and parterre, and the final fireworks scene and Anthony and Kate love confession also happens in the grounds.
With the show being set in the summer, but filmed in October, the production team had to bring in around 5000 artificial flowers to fill the rose garden with Summer blooms. As a National Trust property, the grounds and house are easily available to visit.