Berkeley Street is a street in London that branches off from Berkeley Square. According to historicengland.org, "The west side of Berkeley Square was built in 1745" after being acquired by the Duke of Devonshire in 1696. The street adjacent to it was named Berkeley Street accordingly. Marianne and Elinor take a stroll on Berkeley Street during their stay in London.

https://en.wikipedia.org/wiki/File:Lansdowne_House_Greenwood%27s_Map_Lon...

https://historicengland.org.uk/listing/the-list/list-entry/1000516