The fine dining restaurant, which is headed up by MasterChef: The Professionals winner Steve Groves, will reopen on 4 August with a more modern look and seasonal menu.
The current white and purple-themed dining room will be redesigned with grey and teal finishings, panel-lined walls, and velvet banquette seating.
A new wine display will cover the back wall of the restaurant and will be visible through the restaurant’s windows on the street.
From September Groves is also set to introduce new seasonal menus including dartois of veal sweetbreads with corn and girolle mushrooms; Dorset crab with apple dashi; and pear with chamomile, heather honey and pistachio.
Groves, Michel Roux Jr and Restaurant Associates - which operates the site - have teamed up with Rosendale Design to help create the new look.
“Roux at Parliament Square has an elegant feel, which is perfectly fitting for the building it is set in and the experience diners receive,” says Roux.
“However, with Steve’s dishes bringing a wonderful, modern touch to the restaurant, we knew it was time to do the same to the décor.”
Groves joined the restaurant as senior sous chef when it opened 2010 after impressing Roux during his time on MasterChef in 2009. He was named head chef in 2013.