Cost of a 26 kW standby generator

26 kW generator cost

Main systems + extra loads for large homes Installed cost ranges from$10,939 to$19,814, unit plus installation.

Installed cost range

$10,939–$19,814unit + labor + transfer switch + pad + permits

Source: HomeAdvisor / Angi: whole-house generator installation cost (2026) · retrieved July 2026

Component	Range	Source
Generator unit	$6,989–$8,414	Our catalog: models at 26 kW (msrp_cents)
Labor (licensed installer)Per-project; rises with site prep, gas-line, and panel work.	$1,500–$5,000	HomeAdvisor / Angi: whole-house generator installation cost (2026)
Transfer switch (automatic, ATS)Residential 100–200A ATS. The source's $30k ceiling is commercial switchgear, excluded here.	$2,000–$5,000	HomeAdvisor / Angi: whole-house generator installation cost (2026)
Concrete pad~$50–$75/sq ft; an 18-sq-ft pad runs about $1,000 in the high case.	$400–$1,000	HomeAdvisor / Angi: whole-house generator installation cost (2026)
Permits (electrical + fuel)Typically one electrical permit and one fuel-line permit, $50–$200 each.	$50–$400	HomeAdvisor / Angi: whole-house generator installation cost (2026)

Unit price. Our catalog's 7 models at26 kW range from$6,989 to$8,414 (MSRP). Sales and bundling move this.
Transfer switch. A bundled ATS (included with some SKUs) cuts the switch line item; an oversized or whole-house ATS adds to it.
Site work. Long gas-line runs, a subpanel, or an electrical upgrade push labor toward the high end.
Region. Labor rates vary; our estimator lets you set a low/avg/high cost area.

7 sourced models at this size; every spec cited.

Plug in your size, fuel, and region for a ranged installed-cost estimate.

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