How much does standby generator installation cost in 2026?

Most homeowners pay between $9,000 and $18,000, with a national average near $13,500. Small, simple jobs land at the low end; large or premium-material jobs run well above the high end.

What is the cost per kilowatt?

Installed pricing usually runs $600.00 to $1,100.00 per kilowatt, including labor and materials. Expensive metros can run 15–45% higher than that range.

What drives the price up the most?

Scope and access. Larger quantities lower your per-kilowatt price, but difficult access, demolition of existing work, structural repairs found mid-job, premium materials and rush scheduling each add 8–30%.

Permits are typically required when the work changes structure or ties into electrical, plumbing, gas or mechanical systems. Budget $75–$600 in most cities and confirm whether your contractor pulls it — unpermitted work can block a future home sale.

How long does the job take?

Most residential projects of this type finish in one to five working days once materials are on site. Custom orders, inspections and weather are the usual causes of delay.

How many quotes should I get?

Three. Bids on the same scope commonly vary 20–40%, and the middle bid with the strongest warranty and references is usually the best value — the cheapest bid often excludes prep, disposal or permits.

When is the cheapest time to book?

Off-season and shoulder months. Booking outside the spring–summer rush, and staying flexible on start dates, commonly saves 5–15% because crews are filling calendar gaps.

Yes. Contractor financing, a home equity line, or a 0% promotional card are all common. Compare the total interest cost against paying cash — promotional financing is sometimes priced into a higher bid.

How do I avoid getting overcharged?

Get the scope in writing with materials by brand and model, quantities, exclusions, permit responsibility, payment schedule and warranty. Never pay more than one third up front, and never pay in full before the final inspection.

What size standby generator do I need?

A 14 kW unit covers essentials in most homes; 22 kW handles a whole 2,500 square foot house including central air.

Do standby generators add home value?

Appraisers commonly credit 50–70% of the installed cost, and in storm-prone markets they meaningfully shorten time on market.

How much does it cost to run?

A 22 kW generator burns roughly 2–3 gallons of propane or 200+ cubic feet of natural gas per hour under load.

Home/Cost guides/Standby Generator Installation

Construction

How much does standby generator installation cost?

Standby Generator Installation costs $9,000 to $18,000 for a typical project, averaging about $13,500. Installed pricing usually runs $600.00 to $1,100.00 per kilowatt, and scope, materials, access and local labor rates explain nearly all of the variation.

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National average

$13,500

Typical low

$9,000

Typical high

$18,000

Per kilowatt

$600 – $1,100

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Generator size (kW)22 kilowatts

Quality / material level

Site access

Removal / prep work

Timing

Region

Estimated project cost

$12,666 – $17,365

Most homeowners pay around $15,016

Compare quality / material level

Cost by material

Installed pricing per kilowatt.

Option	Installed cost	Pros	Cons
Portable with interlock	$527 – $723	—	—
14 kW essential circuits	$723 – $952	—	—
22 kW whole-home	$952 – $1,233	—	—
Liquid-cooled 30 kW+ whole-home	$1,233 – $1,700	—	—

Standby Generator Installation cost by project size

Typical installed pricing before local adjustments.

Project size	Budget	Average	Premium
11 kilowatts	$6,600	$9,350	$12,100
22 kilowatts	$13,200	$18,700	$24,200
33 kilowatts	$19,800	$28,050	$36,300
44 kilowatts	$26,400	$37,400	$48,400

Standby Generator Installation cost by material or quality level

Option	Price range	Best for
Portable with interlock	$527.00 – $722.50 / kilowatt	Lowest upfront cost, shortest lifespan
14 kW essential circuits	$722.50 – $952.00 / kilowatt	Best overall value for most homes
22 kW whole-home	$952.00 – $1,232.50 / kilowatt	Longer warranty and better finish
Liquid-cooled 30 kW+ whole-home	$1,232.50 – $1,700.00 / kilowatt	Top-tier materials and custom detailing

Where the money goes

A typical project budget, broken down by line item.

Labor0.45% · $61
Materials0.38% · $51
Permits & inspections0.05% · $7
Overhead & profit0.12% · $16

Cost by region

Labor markets move the number more than any other single factor.

Northeast

$10,350 – $20,700

+15% vs. national average

West

$10,620 – $21,240

+18% vs. national average

Midwest

$8,640 – $17,280

-4% vs. national average

South

$8,460 – $16,920

-6% vs. national average

Common add-ons

Line items that show up on most quotes but rarely in the headline price.

Automatic transfer switch

$500 – $2,000

Gas line run

$500 – $2,500

Concrete pad

$300 – $900

Extended warranty

$300 – $1,200

DIY vs. hiring a pro

Hire a pro

$9,000 – $18,000

Do it yourself

$4,050 – $9,900

DIY saves labor but not materials, permits or rework. Only take it on if the job does not require a licensed trade or inspection.

Ways to save

Practical levers that lower the bill without cutting quality.

Size for essential circuits only — it can cut the total by a third.
Install in fall when generator demand and lead times drop.
Collect three written bids on an identical scope — spreads of 20–40% are normal.
Book in the off-season and stay flexible on the start date to save 5–15%.
Bundle nearby work into one mobilization so you only pay setup and travel once.
Ask what the contractor would change to cut 10% without hurting durability.

Questions to ask your contractor

01Are you licensed and insured in my city, and can I see the certificate?
02Is this a fixed-price bid or an estimate that can change?
03What exactly is excluded from the quote?
04Who pulls the permit and who schedules inspections?
05What is the written workmanship warranty and how long does it last?
06What is the payment schedule, and how much is due up front?
07How long will the work take, and what could delay it?

Frequently asked questions

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Standby Generator Installation cost by city

Local labor rates, permits and climate change the number. Pick your city for prices near you.

Standby Generator Installation cost in Los Angeles, CA

$11,160 – $22,320

Standby Generator Installation cost in San Diego, CA

$10,620 – $21,240

Standby Generator Installation cost in San Jose, CA

$12,420 – $24,840

Standby Generator Installation cost in San Francisco, CA

$13,050 – $26,100

Standby Generator Installation cost in Oakland, CA

$11,880 – $23,760

Standby Generator Installation cost in Sacramento, CA

$9,720 – $19,440

Standby Generator Installation cost in Fresno, CA

$8,820 – $17,640

Standby Generator Installation cost in Long Beach, CA

$10,980 – $21,960

Standby Generator Installation cost in Anaheim, CA

$10,800 – $21,600

Standby Generator Installation cost in Santa Ana, CA

$10,710 – $21,420

Standby Generator Installation cost in Irvine, CA

$11,340 – $22,680

Standby Generator Installation cost in Riverside, CA

$9,540 – $19,080

Standby Generator Installation cost in San Bernardino, CA

$9,270 – $18,540

Standby Generator Installation cost in Bakersfield, CA

$8,730 – $17,460

Standby Generator Installation cost in Stockton, CA

$9,180 – $18,360

Standby Generator Installation cost in Modesto, CA

$9,000 – $18,000

Standby Generator Installation cost in Chula Vista, CA

$10,350 – $20,700

Standby Generator Installation cost in Fremont, CA

$12,150 – $24,300

Standby Generator Installation cost in Pasadena, CA

$11,520 – $23,040

Standby Generator Installation cost in Glendale, CA

$11,250 – $22,500

Standby Generator Installation cost in Santa Clarita, CA

$10,440 – $20,880

Standby Generator Installation cost in Torrance, CA

$11,070 – $22,140

Standby Generator Installation cost in Oxnard, CA

$10,260 – $20,520

Standby Generator Installation cost in San Mateo, CA

$12,600 – $25,200

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