Backup Generator Installation Costs in Central Texas (2025 Guide)
Why Costs Vary
The price of a whole-home backup generator in Central Texas depends on three main factors:
Generator size (kW) — larger homes and higher demand require bigger units.
Fuel type — natural gas vs propane impacts both install and operating cost.
Site conditions — trenching, gas line distance, and electrical panel setup.
Most homeowners spend $9,500–$15,000 total for a professionally installed system. That includes the generator unit, plumbing, electrical, permits, and inspection — everything needed to be fully operational.
Cost Breakdown
Home Size / DemandRecommended kWTypical Installed CostNotesUp to 2,000 sq. ft.14–16 kW$9,500–$11,000May cover basics, but risky for whole-home load2,000–3,500 sq. ft.18–22 kW$11,500–$14,000Covers HVAC + appliances safely at 70% load3,500+ sq. ft. or high demand (pool, EV, multiple HVAC)24 kW+$14,000–$18,000+Large homes or high-draw systems
Hidden Costs Homeowners Should Watch Out For
Some “generator dealers” advertise low sticker prices but add heavy markups:
Dealer markup on the unit itself (20–40% more than direct).
Extra charges for plumbing or electrical work (since they subcontract).
Cutting corners on sizing — selling too-small units that fail under load.
At Weatherproof Generators, we cut out the middleman. Electrical and plumbing work is handled by our licensed companies, and every job passes inspection the first time.
Real-World Example
A 2,400 sq. ft. Round Rock home with one HVAC, electric range, and refrigerator:
Dealer quote: $16,500 for a 14 kW unit (too small to power the home).
Correct install: $12,500 for an 18 kW unit — right-sized and inspection guaranteed.
Long-Term Value
Fuel costs: Natural gas is typically cheaper over time; propane is reliable but requires refills.
Maintenance: Annual load testing and service average $300–$500/year.
Resale impact: Homes with standby generators often appraise higher in Texas.
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Every property is different. Get a quote that reflects your home, fuel access, and needs.
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Not sure which size you need? Our Generator Sizing Guide for Central Texas Homes breaks it down by load profile.