The substation was completed in 1905 to the design of Charles Stanley Peach in a Baroque style from Portland stone featuring a mannerist domed pavilion and steps at either end, a balustrade and Diocletian windows along the sides to light the galleries of the engine rooms, and deep basements.
[2] The deck of the property was open to the public as an ornamental garden until the 1980s when it was closed by the then lessees, the London Electricity Board.
[5] In 2012 the gardens were closed for further refurbishment, funded by Grosvenor Britain and Ireland, under supervision of BDP, the architectural consultancy.
[2] The new development includes a glass building at the Western end, housing The Garden Café, run by Benugo.
[6][7] The gardens were reopened to the public in June 2013, complete with over sixty bespoke seating and planter products.