The former Marybrooke guest house is socially, historically and architecturally significant at a regional level as the grandest in a chain of six guest houses all using the prefix "Mary" designed and built by Eric Dowdle between 1927 and 1940.

It is indicative of the extensive development of the Dandenongs as a holiday destination in the first half of the twentieth century and illustrates the level of comfort and facilities available to guests by 1940. It is architecturally significant as a 3 storey timber framed building.

The advertisement below is from "THE ARGUS" Newspaper, Wednesday 17th January 1940.