Backup generator services
Backup generator services cover four separate jobs: sizing and selling the unit, the electrical work (transfer switch, wiring, sometimes a panel change), the fuel work (natural gas or propane piping), and ongoing maintenance. A whole-house standby install averages about $5,090 nationally and commonly lands between roughly $1,524 and $8,658 depending on size and site, per Bob Vila's 2026 cost data. Installation labor alone typically runs $1,500 to $5,000.
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What generator services actually cover
A standby generator install is really three trades stapled together. An electrician wires the automatic transfer switch and the feed to your panel. A licensed gas fitter or plumber runs the natural gas or propane line. Someone pours or sets a pad. Building departments typically want both an electrical permit and a plumbing/gas permit, and they inspect and pressure-test the gas piping before it's signed off.
The single most important part is the automatic transfer switch. It isolates your house from the utility grid before the generator energizes anything. Without it, power from your generator can flow back out onto the utility lines - that's called backfeeding, and it can electrocute the lineworker trying to restore your power. This is not a job to save money on, and it is not a homeowner project.
Whole-home coverage is the expensive version. Many homes are better served by an "essentials" install that backs up the furnace, well pump, fridge, sump pump and a few circuits. Ask any salesperson to quote both, in writing, with the covered circuits listed. If they will only quote whole-home, that tells you what they're optimizing for.
Portable generators are a different service category entirely. There's no install, but there is a real safety burden that falls on you - see the Emergency and Safety guidance before you buy one.
All generator services
Each one covers what the job involves, what moves the price, and when it is the wrong call.
Picking the right generator job
The judgement calls that decide the bill, before anyone quotes you.
Get the covered-circuit list in writing
"Whole home" and "managed whole home" and "essential circuits" are three different products at three different prices. The quote should name the circuits.
Confirm who pulls which permit
Standby installs usually need an electrical permit and a gas permit. The contractor should pull both in their name and schedule the inspections.
Ask what the gas meter can actually supply
A large generator can outrun your existing gas meter. Utilities often have to upsize it. Find out before signing, not after the pad is poured.
Never accept an install without a transfer switch
Any arrangement that involves plugging a generator into a wall outlet or a dryer socket to power the house is a backfeeding hazard. Walk away from anyone who suggests it.
Separate the sale from the service plan
Maintenance contracts are often bundled into the pitch. Price the install on its own so you can compare bids that don't include a plan.
The wrong service call is the expensive one
Most people booking generator work are buying a diagnosis, not a job - and the trade you pick decides what diagnosis you get. Book the wrong specialist and you pay a call-out fee to be told it is somebody else's problem.
- Describe the symptom What you can observe, and when it started. Not what you think it is.
- Ask what the visit includes Whether the diagnostic fee is credited against the work is a question with a real answer.
- Get the scope in writing A number with no line items cannot be compared to a second number.
Where these figures come from
Sources last checked
- Bob Vila - Whole-House Generator Cost · retrieved 2026-07-26
- Bob Vila - Whole-House Generator Installation · retrieved 2026-07-26
- Ready.gov - Power Outages (Generator Safety) · retrieved 2026-07-26
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