The Movement for Innovation in Construction, a body set up to spread best practice, believes that too many of the demonstration projects set up so far are based in the South-east.
It was this week due to reveal details of the projects that will be grouped for comparison. The aim is that lessons will be learned by sharing ideas across projects in each "cluster".
Clusters based in the South have up to nine projects, whereas those further north have only four or five.
The project results will be assessed at a conference to be held in June.