Do you need MEP drawings for a building permit?
The short answer
Usually, if your project adds or changes heating, ventilation and air conditioning, electrical systems or plumbing. Purely cosmetic work often does not need them. Your municipality can confirm what applies to your scope.
What MEP drawings show
- Mechanical: HVAC layouts, equipment and ventilation.
- Electrical: power, lighting, panel locations and schedules.
- Plumbing: fixtures, supply and drainage layouts.
When they are typically needed
- Adding or relocating HVAC equipment or ductwork
- New or changed lighting and power layouts in commercial space
- New plumbing fixtures or drains, such as washrooms and kitchens
- Restaurant and food-service fit-outs
Why coordination matters
MEP drawings that do not agree with the architectural drawings are a common cause of review comments. Ducts that do not fit above the ceiling, or fixtures in the wrong location, mean revisions and delays. Preparing the sets together avoids this.
Next step
See our MEP drafting and coordination service, or contact us to confirm what your project needs.