Tomasso Brothers Fine Art, Trinity Fine Art, and Italy’s Benappi Fine Art, will all open new premises during the event, which runs from June 30-July 7.
Sculpture specialist Tomasso Brothers moved out of its Duke Street premises when the lease expired last year.
It is now opening at 67 Jermyn Street and will launch with the exhibition Canova and his Legacy.
Benappi from Turin will open its first London gallery when it moves into 27 Dover Street.
The ground floor of the gallery has been restored to its original Georgian layout, where Benappi will display painting and sculpture from the 14th to the 18th centuries.
A representative told ATG the new gallery puts Benappi at the “heart of the London art market”.
The firm has long been an admirer of London Art Week, the week-long summer celebration of pre-contemporary art in Mayfair and St James’s, because “turning a whole city into an art fair… is an inspired idea”.
Trinity Fine Art has left London’s Bruton Street after 28 years and is moving to 15 Old Bond Street, formerly the premises of Colnaghi.
“Trinity has backed London Art Week from the very beginning,” says director Alexandra Toscano. We are keen that London continues to be the place for galleries and collectors, particularly in June and July but also throughout the year.”
This year London Art Week runs twice, with a new event added for the winter from December 1-8.