First, create an asset by completing the required details, then create an assessment for that asset.
Open the assessment and go to Assessment Detail from the left-hand navigation. In the top right corner, click Edit to open the assessment details.
In the Assessment Address section, locate the BREEAM Region field, which is the last option. Based on the country already entered in the asset details, select the correct region for your asset.
Once you have updated this, click Save in the top right corner. This will apply the correct regional weightings to your assessment.