What Is a Retail Electrical Upgrade?
A retail electrical upgrade gives a tenant unit the distribution and capacity its fit-out actually needs: a tenant panel, circuits for display and track lighting, HVAC, a dedicated signage feed, clean point-of-sale and network circuits, and back-of-house equipment connections. Where the lease requires it, submetering provision so the unit’s consumption can be billed separately.
The defining constraint is the base building. The landlord’s service allocates a certain capacity to your unit, and the lease description of that allocation is frequently optimistic or simply out of date. Retail fit-outs get into trouble when a lighting and HVAC design is finalised on an assumed allocation, and the real capacity turns out to be lower. We document what the unit actually gets before the design locks in.
The second constraint is time. Retail projects run to an opening date, and the electrical path to occupancy includes an ESA plan review confirming the design meets the Ontario Electrical Safety Code (OESC) before install, and an ESA inspection before sign-off. Both have lead times, so they get booked backward from your opening date rather than after the shopfitter finishes.
For the commercial range, see commercial electrical panel upgrades.
Typical Scopes
- Tenant panel and circuits within existing capacity. The most common scope: new panel, lighting, HVAC, POS and signage circuits.
- Tenant panel with submetering. Where the lease requires consumption billed to the unit.
- Base-building capacity upgrade. Where the allocation genuinely cannot carry the fit-out. See 200A to 400A service upgrades.
- Food retail with refrigeration. Dedicated compressor and condenser circuits with separate alarm and monitoring feeds.
When a Retail Unit Needs Electrical Work
- A new fit-out in a previously leased unit. The last tenant’s distribution almost never matches your layout.
- Display lighting density is increasing. Track and accent lighting specified by area rather than by load.
- HVAC is being replaced or added. The most common reason a unit exceeds its base-building allocation.
- Exterior signage is going up. A dedicated circuit with timer or photocell control is required.
- Breakers trip during trading. Circuits extended over successive tenancies rather than properly added.
- The lease requires submetering. Provision has to be installed before the walls close.
What Drives the Cost Between $5,000 and $15,000
Whether base-building capacity changes is the largest factor by far. Working inside the existing allocation is a tenant-side job. Increasing the allocation brings the landlord, the utility and possibly a CT cabinet into scope. Circuit count and lighting density is second, because each track run, display feed and equipment connection is labour. Submetering adds material and coordination. Trading-hours restrictions are fourth, since most landlords require noisy or shared-room work outside opening hours.
The ESA plan review and any after-hours premium are itemised rather than buried in a labour line.
What to Expect Through the Fit-Out
We start by documenting the real base-building capacity to your unit and calculating your tenant load from the fit-out drawings. If those two numbers do not reconcile, you hear about it before the design is finalised rather than after. Where the allocation has to increase, the landlord approval and utility coordination start immediately because they set the schedule.
Install runs to the shopfitter’s programme. The tenant panel is set in the back-of-house position, circuits are run for lighting, HVAC, POS, network and back-of-house equipment, and the signage feed is taken to the storefront position with its control gear. Submetering provision goes in at this stage if required.
The ESA inspector attends ahead of your occupancy date. You receive the tenant panel schedules, the Certificate of Inspection and the itemised invoice, which is the package the landlord will ask for before releasing occupancy.
Electrical Capacity for Retail Tenant Improvements: Base-Building Allocation, POS, Lighting, HVAC
A retail tenant improvement lives inside the base-building electrical allocation the landlord published in the lease. Confirming that allocation, matching it to the fit-out load, and knowing when the landlord has to increase it is the first electrical decision on the project.
Base-building allocation typical ranges
- Small mall or plaza unit (500-1,500 sq ft): 100A single-phase or 200A single-phase 240V typical.
- Larger main-street unit (1,500-3,500 sq ft): 200A three-phase 208V, occasionally 400A three-phase.
- Big-box format retail: 400-800A three-phase 208V or 600V, depending on the base building.
- Anchor tenant or full-store food service: custom allocation with a dedicated service feeder and separate meter base.
Retail-specific load categories
- Lighting per square foot: track lighting, accent lighting, and general ceiling lighting typically 2-4W per square foot on LED, distributed over 20A circuits with dimming.
- POS and network: 20A dedicated circuits per POS station, structured cabling to a back-of-house data closet, and a dedicated UPS feed on some brands.
- HVAC: a rooftop packaged unit or split system on 30-60A three-phase, matched to the base building’s mechanical allocation.
- Signage and storefront: a dedicated circuit for illuminated signage on a timer or photocell, plus decorative window lighting.
- Back-of-house appliances: microwave, mini-fridge, water heater on dedicated 20A circuits.
Where the allocation gets tight
- Food service concept in a former retail unit: commercial kitchen equipment typically doubles the allocated load, requiring an increase.
- Cannabis or specialty retail with high-lumen grow-adjacent lighting: unusual load profile that the base building may not accommodate.
- EV showroom or auto retail with test-charging: Level 2 or Level 3 chargers add 40-125A of continuous load per port.
Confirming the allocation
- Landlord letter naming the amperage and voltage: the definitive document.
- Photograph of the tenant panel or meter base: cross-check against the letter.
- Utility meter type: single-phase or three-phase meter, and the meter number on the base building record.
Upgrading Service for a Retail Unit: Landlord Approval, Utility Application, Cutover to New Tenant
When a retail unit’s existing service is not sized for the incoming tenant, the upgrade chain runs through landlord approval, utility service application, ESA plan review, and a coordinated cutover. Each step has a fixed lead time.
Landlord approval
- Written consent for a tenant service upgrade: required by almost every commercial lease.
- Cost allocation: the lease dictates whether the tenant pays the full upgrade, the landlord contributes, or the amortisation runs through the rent.
- Base building main capacity check: if the tenant upgrade pushes the base building main over 80% continuous load, the landlord may need to upgrade first.
- Timeline expectation: landlord approval typically takes 1-4 weeks depending on the property management structure.
Utility service application
- Toronto Hydro, Alectra Utilities or Elexicon Energy application for a service increase: filed against the property address with the load calculation and single-line diagram.
- CT cabinet configuration for services over 200A: the utility specifies CT ratio, cabinet layout, and metering position.
- Utility lead time: 4-12 weeks depending on jurisdiction and scope.
- Disconnect and reconnect coordination: scheduled around neighbouring tenants and base-building operations.
ESA plan review
- Commercial ESA plan review for a service upgrade: load calculation, single-line diagram, equipment schedule, and site plan filed for review.
- Review response window: typically 2-4 weeks, with responses to comments filed by the licensed contractor.
- ESA Notification of Work issued on plan review sign-off: the permit against which the inspection is booked.
Cutover to the new tenant service
- Overnight or weekend cutover window: minimises impact on neighbouring tenants and any base building shared systems.
- Temporary power for adjacent tenants if the base building distribution is affected: scoped in advance with the landlord.
- New tenant panel energised, existing service isolated: a discrete cutover, documented on the single-line and the panel schedules.
- ESA final inspection and Certificate of Inspection: the document the landlord requires before releasing occupancy.
