This document is the companion to parts 1 and 2 of the guidance on how to use Level(s). In part 1 a general introduction to Level(s) is provided, together with in Part 2 an overview of the macro-objectives, performance indicators and the three Levels of performance assessment (Level(s) - Part 1 and 2). The three Levels are:

• Level 1: Common performance assessment
• Level 2: Comparative performance assessment
• Level 3: Performance optimisation assessment

This part 3 of the documentation provides a complete set of technical guidance on how to make performance assessments at each of the three different Levels, and then to report on the results. In order to use the guidance it is recommended to follow the steps below:

• Step 1: Define the building to be reported on
• Step 2: Choose the level of performance assessment
• Step 3: Follow the guidance and rules on how to carry out an assessment
• Step 4: Complete the reporting format
• Step 5: Determine the valuation influence and reliability of the assessment