Marrable approached this task with a methodical eye, but often ended up being perceived as boring, as The Elector for 27 June 1857 said that he was "squeezing every word to death almost in a half-closed mouth, so that nobody scarcely knows what he says".
He produced a three-storey building in the Italianate style, which (after subsequent enlargements) was impressive for Nikolaus Pevsner to regard as the chief interest in the street.
There was indeed an outcry, with John Nicholay (member for Marylebone, a vestry committed to strict economy) describing the proposal as an act of suicide.
The Garrick is fronted in Portland render which blackened over the years; proposals to clean it did not receive the support of club members until 2005.
Marrable died suddenly on a visit to inspect the Bethlehem Hospital for Convalescents in Witley, and is buried at the Kensal Green Cemetery in London.