First rule of the design is the need to keep the people in and around the laboratory safe. Each country will have local of country regulations that set out the specific requirements.
You will need to look at the whole design to create a good working environment for the people. Things to take into consideration are identifying hazards and remove or, at least, minimize them. Further you will also have to look at ergonomics, things like proper furniture, moderate temperatures, enough (day)light, plenty of workspace and many more.