A panel and an electrical service are different parts of the system
The panel distributes electricity to property circuits. The service is the incoming supply and associated equipment. Replacing a panel does not automatically increase the available supply. A Licensed Electrical Contractor should assess existing condition and demand, planned loads and the utility requirements before recommending equipment. Spare breaker spaces alone do not establish capacity.
Prepare the scope for your Caledon property
Describe the location of the existing service and the uses of any garage, workshop or outbuilding. List planned equipment and identify whether additional supply is needed at the house, another structure or both.
Ask how the recommended design accounts for the complete property and which utility requirements apply. Distance, access and routing can affect scope, but they do not justify guessing the service size before assessment.
What should the assessment establish?
For a Caledon property with more than one structure, the proposal should name which supply and distribution equipment is included at each location. A recommendation at the house may not address the limitations of a separate building connection. Ask whether the assessment considered the equipment you plan to operate in that structure and the route serving it. If excavation or another property alteration is needed, identify the responsible party and restoration boundary. The project should describe an integrated supply plan while keeping any unrelated future building work outside the present agreement.
Questions before you agree to work
Does every new load need a larger service?
No universal service size applies to every project. The contractor must assess the existing system and proposed demand, and explain whether a service change, another design or no capacity change is appropriate.
Who arranges utility and ESA steps?
Confirm this in the written scope. Service work may need utility coordination as well as ESA notification and review. Ask the contractor what they arrange and what the owner must supply or authorize.