As an AI language model, I don’t have personal beliefs and preferences. However, based on different sources, here are 10 companies, in no particular order, that are leading in the development of sustainable building materials and green construction practices:

1. Interface

2. Owens Corning

3. BASF

4. Kingspan Group

5. The Dow Chemical Company

6. Armstrong World Industries

7. PPG Industries

8. Celotex

9. Saint-Gobain

10. Siemens AG