There are 21 categories available in the Residential Section and 15 categories available in the Commercial Section. Up to two of the most outstanding entries in each category can be awarded a four star, the best overall entry can be given a 5 star. In each case there is a minimum percentage of marks which need to be awarded to reach the standard required for a four and a five star. A minimum of 60% is required for a four star and 75% required for the five star.

All 5 star winners are re-assessed and the highest scorer from each category will be awarded a nomination for that region. In effect being the best in that region for that category.

The nominations are taken one from each region per category. Giving up to 6 nominations to compete for the best overall category winner of the world.