Team spirit is promoted throughout The Gregg School. On admission to the school, students are assigned to one of three houses: Roman, Spartan or Trojan. 

A comprehensive range of house events takes place throughout the year, and students compete both individually and in teams towards the annual House Championship Trophy. Events include: Football, Netball, 5-a-side Football, Bake Off, Photography, Quiz, Badminton, Chess, Table Tennis, MFL Spelling Bee, Number Day, Hockey, Original Writing, Cross Country, Rugby, Poetry Writing, Swimming Gala, Music, Verse Speaking, Maths Challenge, Tennis, Rounders, Cricket and Sports Day.


In addition, the credits and debits system counts towards the House Championship, students being encouraged to obtain as many credits as possible, both for their own individual achievements and collectively for their Houses.