Permanently installed standby generators, the transfer switch that keeps them separated from the grid, inlet boxes for a portable unit, load calculations and annual service. The connection is electrical contracting work, and a propane or natural gas unit needs a TSSA certificate holder for the fuel side.
Quote only
An air-cooled standby unit with an automatic transfer switch, supplied and installed. Excludes the pad, the propane tank, trenching, and any panel upgrade the load calculation turns out to require.
Demand and price peak in fall. Booking outside it is the cheapest saving available on this job.
Required by law. Ontario law requires this credential for the work. A contractor without it cannot legally do the job, whatever the quote says. Electricity Act, 1998, O. Reg. 570/05 (Licensing of Electrical Contractors and Master Electricians).
You asked for the trade Standby generators, and the words "replace galvanized supply lines". Of the 12 businesses listed, none match every one of those.
The cost band and the licence requirements above still apply. They are what you need to judge a quote from anywhere else: whether the price is in the range, and whether the person quoting is allowed to do the work at all.
Listings here are seed data for demonstration and are labelled as such on each profile. Cost bands are what GTA homeowners are typically quoted, not offers. Always confirm a licence number against the issuing registry yourself before work starts.