Transparency, Fairness, consistency in communications and processes, helps a lot in building trust. Have One-on-One discussion with each team members every month, listen to their problems and provide support in challenging situations.
Raj explained how to build trust quite nicely. I would say honesty, open communication, and active listening is vital to trust. No bullying and talking behind your back - seems obvious rule, but it is essential to inform and remind the importance of it to the team. People also should feel that they and their opinions matter.