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Commercial Generator Cost in Toronto: the 2026 Quoted Ranges

Last updated:ByStandby Power Desk

A whole-house standby generator runs $10,000 to $16,000 fully installed in Ontario, per TrueSource Generators, with install labour alone at $9,000 to $15,000 on 22-45 kW units. Above that size Canadian suppliers quote per project and publish nothing, so this page prints no figure for it rather than borrowing a US one. Permits add $400 to $800.

What does a commercial generator cost by size?

This range rests on 3 independent sources, counted from the 8 priced lines below rather than from a list at the bottom of the page. Every figure was re-read in the page it is credited to. Where sources disagree, both numbers are shown and the disagreement is named in the row's condition; we do not average them and we do not widen a range to cover one.

Each bar runs from the low to the high of one published range, on a scale shared by every commercial generator installation line quoted in the same unit. Bars that do not line up are sources that do not agree. 6 of 8 priced lines are drawn here; the numbers are the same ones in the table below.

per project (CAD), install labor

  • Standby generator, 7-10 kW, installation labor only

    $2,500–$4,000

  • Standby generator, 12-20 kW, installation labor only

    $4,000–$10,000

  • Standby generator, 22-45 kW, installation labor only

    $9,000–$15,000

per project (CAD), fully installed

  • Generac 22 kW generator, fully installed

    $10,500–$12,500

  • Generac 26 kW generator, fully installed

    $11,500–$14,000

  • Whole-house standby generator, fully installed total

    $10,000–$16,000

Not drawn: 2 lines, each the only figure on this page quoted in per year (CAD) and per project (CAD), combined permits. With nothing else in the same unit there is no shared scale to draw them on. Every one of them is priced in full in the table below.

  • Standby generator, 7-10 kW, installation labor only

    Installation only, not the generator. Barrie Heating & Cooling describes this size as powering essential items such as refrigerators, sump pumps and a few lights.

    Typical range
    $2,500–$4,000
    Unit
    per project (CAD), install labor
    Source
    Barrie Heating & Cooling

  • Standby generator, 12-20 kW, installation labor only

    Installation only. This band is for average-sized homes running several appliances including central heating and cooling; it is not a commercial-scale figure.

    Typical range
    $4,000–$10,000
    Unit
    per project (CAD), install labor
    Source
    Barrie Heating & Cooling

  • Standby generator, 22-45 kW, installation labor only

    Installation only. This is the one size band Barrie Heating & Cooling describes as suitable for large homes or commercial properties.

    Typical range
    $9,000–$15,000
    Unit
    per project (CAD), install labor
    Source
    Barrie Heating & Cooling

  • Generac 22 kW generator, fully installed

    TrueSource's own column heading calls this an Estimated Installed Total. They give the unit MSRP separately at about $6,500 CAD.

    Typical range
    $10,500–$12,500
    Unit
    per project (CAD), fully installed
    Source
    TrueSource Generators

  • Generac 26 kW generator, fully installed

    Estimated Installed Total, for what TrueSource describes as large homes with heavy electric loads. Unit MSRP is listed separately at about $7,600 CAD.

    Typical range
    $11,500–$14,000
    Unit
    per project (CAD), fully installed
    Source
    TrueSource Generators

  • Whole-house standby generator, fully installed total

    "all in" - TrueSource's whole-job figure. Cold-weather kits are extra: they state most Canadian dealers include them but they add about $250 to the hardware cost.

    Typical range
    $10,000–$16,000
    Unit
    per project (CAD), fully installed
    Source
    TrueSource Generators

  • Annual maintenance contract, residential/light-commercial unit

    Per year, recurring, and for a residential-scale unit. Barrie Heating & Cooling lists it under additional costs to consider, separate from the install.

    Typical range
    $200–$650
    Unit
    per year (CAD)
    Source
    Barrie Heating & Cooling

  • Ontario permit package: ESA electrical + TSSA gas + municipal building

    The combined total. Ontario Generator Systems breaks it into an ESA electrical permit at $100-$300, a TSSA gas permit at roughly $100-$250, and a municipal building permit at $150-$500 where one is required at all.

    Typical range
    $400–$800
    Unit
    per project (CAD), combined permits
    Source
    Ontario Generator Systems

What is actually inside the number?

Two quotes for the same job are hard to compare when one folds a line into its total and the other leaves it out. This is the shape of the work, stage by stage, with every figure taken from the same priced lines in the table above.

Labour only, or the whole thing, and how to tell which you were quoted

Two numbers on this page look comparable and are not. One prices the installation labour and assumes the machine is bought separately, the other prices the finished job. Size drives both.

Installation labour alone, by unit size

  • 7 to 10 kW

    $2,500–$4,000

    Labour only. The generator itself is not in this figure.

  • 12 to 20 kW

    $4,000–$10,000

    The band widens with size because site work does.

  • 22 to 45 kW

    $9,000–$15,000

    At this size the pad, the enclosure, trenching and cable-run distance are what move it.

Or quoted as a finished job

  • Generac 22 kW, fully installed

    $10,500–$12,500

    Machine and installation in one number.

  • Generac 26 kW, fully installed

    $11,500–$14,000

    Four more kilowatts, and the two bands overlap.

On top, whichever way it was quoted

  • Ontario permit package

    $400–$800

    ESA electrical, TSSA gas and the municipal building permit together.

  • Annual maintenance contract

    $200–$650

    A running cost, not a one-off. Code-required emergency systems need service and load-bank testing to stay certified.

Whole-house standby, fully installed total

$10,000–$16,000

A published all-in figure for the finished job. The labour-only lines above are a different scope from this one and are not a component of it.

What drives the price?

Size, access and how much of the existing electrical and gas work has to be redone move a commercial generator installation quote more than brand choice does. Each factor below is one a source on this page prices or names.

  • Generator size in kW and fuel type: diesel, natural gas or propane
  • Transfer switch type and size: open-transition versus closed-transition/paralleling-capable
  • Site work: concrete pad, sound enclosure, trenching and cable run distance from generator to building
  • Fuel storage: diesel requires a tank, spill containment and periodic fuel testing; gas-fired units do not
  • ESA, TSSA and municipal permit fees, plus any required engineering stamp on larger installs
  • Paralleling switchgear for multi-unit or N+1 redundant systems on larger commercial or critical-facility jobs
  • Ongoing annual service contract and load-bank testing needed to keep code-required emergency systems certified

What's specific to Ontario and Toronto?

Ontario adds 13 percent HST, requires an ESA permit for the electrical work and a TSSA permit for anything gas-fired, and licenses who may do each. These are the local rules that change the total.

  • ESA (Electrical Safety Authority) electrical permit required for every permanent generator installation, typically $100 to $300
  • TSSA (Technical Standards and Safety Authority) fuel-gas permit required for natural gas or propane-fired units, typically $100 to $250
  • Municipal building permit may also apply, typically $150 to $500; combined permit costs typically run $400 to $800
  • Ontario Fire Code can require verified emergency power for life-safety systems (exit lighting, fire alarm, elevators) in certain commercial and institutional buildings
  • All generator equipment and installation invoices are subject to 13% HST

How can I pay less?

The biggest savings come from bundling visits, avoiding after-hours rates, and checking which fees a quote already contains. Each tip below is tied to a figure in the table above.

  • Get at least two to three quotes for anything above 50 kW; commercial pricing is rarely published and varies a lot by installer
  • Natural gas units skip the cost and maintenance of on-site fuel storage where a gas line is already available
  • Right-size the generator to the actual code-required emergency or critical loads rather than the whole building, which cuts equipment and fuel-tank cost together
  • Bundle the annual maintenance contract with the installer at time of purchase, it is often cheaper than adding it later
  • Ask whether a closed-transition transfer switch is really required for your use case; an open-transition switch is materially cheaper where load-shedding isn't needed

How did we research these numbers?

Every price on this page was found in the page it is credited to, and recorded with the sentence that carries it. Where a figure could not be found in its source it was removed rather than adjusted. Here is what that left, and what it could not settle.

  • Toronto and Ontario pricing for small commercial and whole-home standby generators up to about 45 kW is well documented by local electrical contractors, running roughly $2,500 to $16,000 CAD fully installed depending on brand and size.
  • Above that size, into true commercial and industrial standby power (100 kW to multi-megawatt), Canadian suppliers such as Genrep, Toromont and Cooper Equipment Rentals do not publish prices online and quote per project. This page therefore prints no figure for that band at all. It previously carried US industry benchmarks; those have been removed rather than converted, because a US dollar figure sitting in a Toronto price table reads as a Toronto price.
  • As a rule of thumb, site work, switchgear, fuel infrastructure and permitting on a commercial project often cost as much as the generator equipment itself, sometimes 50 to 100 percent on top.
  • Diesel units generally carry a higher upfront equipment cost than natural gas units of the same output, though gas eliminates on-site fuel storage and refuelling logistics.
  • In Ontario, every permanent standby generator needs an ESA electrical permit, and a gas-fired unit also needs a TSSA fuel-gas permit; buildings governed by the Ontario Fire Code may additionally require code-compliant emergency power for life-safety systems such as exit lighting and fire alarms.
  • Get two to three local quotes for anything above 100 kW: the spread between suppliers is wide and driven by site conditions like trenching distance, concrete pad size and available electrical service capacity.

Sources

Who can do the work?

Home Generator Index tracks 12 commercial backup power contractors across the Greater Toronto Area, rated 4.02★ on average. The three below rank highest on our review-weighted score, based on Home Generator Index's analysis of 12 GTA businesses, August 2026.

3 photographs published by 2 of the commercial generator installation companies above, on their own Google Business profiles. We show a picture only after looking at it, and only where the subject is the installed work. Storefronts, staff portraits, branded vans and manufacturer product shots are held back, because none of them says anything about whether a company can wire a transfer switch.
See all 12 commercial backup power contractors on Home Generator Index

Work out your own numbers

The table above is what other people paid. These calculators put your own house into the same published figures, and none of them asks for an email address.

What do the terms on a generator quote mean?

Two commercial generator installation quotes are hard to compare when each uses the same word for a different scope. These 2 terms appear on the line items above, and each one changes what a number covers.

Switchgear
The breakers, transfer equipment and controls that move a building between utility and generator power at commercial scale. On a commercial project it sits in the half of the budget that is not the generator, alongside site work, fuel infrastructure and permitting.
Life-safety standby power
Backup power the Ontario Fire Code requires for systems such as exit lighting, fire alarms and elevators in certain commercial and institutional buildings. It is a compliance obligation with its own testing regime, not an operational choice.

What else changes the total?

a Commercial Generator is rarely quoted on its own. A cost that looks like an overrun on a commercial generator installation quote is usually a priced line item on one of these three guides.

Frequently asked questions

How much does a home standby generator cost installed in Ontario?

Whole-house standby generators typically run $10,000 to $16,000 CAD fully installed in Ontario, with small 7-10 kW units running $2,500 to $4,000 for installation labor alone.

What does a 22 kW Generac generator cost installed?

A 22 kW Generac unit typically runs $10,500 to $12,500 CAD fully installed in Canada, including the transfer switch and labor.

How much does a commercial generator in the 100-500 kW range cost?

No Canadian supplier found publishes a price at that scale. Genrep, Toromont and Cooper Equipment Rentals all quote per project, so this page prints no range for 100-500 kW rather than borrowing a US one. Expect to need two to three site-specific quotes.

How much does installation add on top of the generator equipment for a commercial project?

Site work, switchgear, fuel infrastructure and permitting on a commercial project often cost as much again as the generator itself, sometimes 50 to 100 percent on top. That is a proportion rather than a price, and it is the one part of a commercial budget that is consistently underestimated.

What permits does a generator installation need in Ontario?

A generator needs an ESA electrical permit ($100 to $300) and, if gas-fired, a TSSA fuel-gas permit ($100 to $250); combined permit costs typically run $400 to $800.

How much is an annual maintenance contract for a standby generator?

For small residential or light-commercial units, Barrie Heating and Cooling puts annual maintenance at $200 to $650. Above that, Ontario providers quote per unit rather than publishing rates, so this page gives no figure for larger commercial bands.

How much does a diesel fuel storage tank cost?

Ontario suppliers quote fuel tank cost per site, and none found publishes a rate, so this page does not print one. Tank size, above or below ground, spill containment and setback distances all move it.

Does HST apply to generator installation in Ontario?

Yes, generator equipment and installation labor are subject to Ontario's 13% HST like any other home improvement or commercial contract.

Questions to ask your contractor

  1. Have you delivered emergency power for a building of this type before?
  2. Is a load study part of this proposal, and do I see the assumptions? Commercial cost benchmarks
  3. What does the fuel system involve, and what approvals does it need?
  4. Who handles routine and load bank testing, and who keeps the log?
  5. What is your written response commitment when the system fails?