We encourage you to combine all permit applications onto one application form. There is no additional cost for this, and it will simplify the plan review process. If you choose to separate the mechanical from the building permit, you will need to provide much of the information a second time, as well as separate plans.
A separate mechanical plan review fee is also charged. Many mechanical permits require an analysis of the building. Combining the plan review allows the same plans examiner to review the applications and perform the calculations one time. This will allow the contractor to use one permit number when calling in inspections.