The club grew as a logical extension of a highly successful junior clubs that have provided sporting opportunity through Rugby for generations of boys and young men in the Hills district.

Beecroft Rugby Club had its origins in the St Leo’s Old Boys RUFC, which thrived for years until the school changed focus and its player stream dried up.

It then amalgamated with Ku-Ring-Gai High Old Boys, but over time it became obvious that there were too many suburban clubs on the north shore for the number of available players.

In the three years of the competition Beecroft has competed in each Grand Final, winning the State Title in 2006 and 2008.

In 2007 this feat was repeated with the 1st Grade team again winning the Barraclough Cup and the 4th Grade team likewise winning the Richardson Cup.