The restaurant was opened by Salt Yard Group in 2011 but was sold to London-based Urban Pubs and Bars in October 2018.
Its new owners will close the site on 7 July and it is expected to reopen early August with head chef Łukasz Kiełbasiński at the helm.
Kiełbasiński has spent the last two years as senior sous chef at Salt Yard and has created a Spanish and Italian-inspired menu with new dishes such as Welsh lamb belly with summer vegetables and hazelnut and Capra pesto sitting alongside old favourites such as the Iberico pork burger and N’duja scotch egg.
Opera Tavern’s 24-cover ground floor will be rearranged and feature a communal table, counter seating and contemporary art, while the more formal 45-cover upstairs restaurant will be fitted out with dark colours with its own serviced bar.
Urban Pubs and Bars now owns the entire Salt Yard portfolio, after buying its remaining three London restaurants Dehesa and Ember Yard in Soho and its eponymous Fitzrovia site in November last year.