San Antonio, TX · 2025 Cost Guide
How Much Does a Generator Installation Cost in San Antonio?
A standby generator keeps your home powered during outages and adds significant peace of mind and resale value. In San Antonio, labor rates run $49–$90/hr — below the national average — which is factored into all estimates on this page.
The wide price range reflects major differences in project scope, materials, and the age of your home. A cosmetic refresh costs far less than a full renovation, and San Antonio's specific market conditions affect contractor pricing year-round.
| Cost Factor | Typical Range | Impact on Price |
| Generator size (kW) | $2,000–$10,000 | High |
| Transfer switch | $500–$2,000 | High |
| Gas line installation | $300–$1,500 | Medium |
| Permits | $200–$600 | Low |
| Labor | $55–$100/hr | High |
What size generator do I need for my house?
A 20kW generator powers most homes. Calculate your needs by adding up essential appliances.
Does a whole-house generator add home value?
Yes — whole-house generators add $5,000–$15,000 to home value and are highly attractive to buyers.
How long does generator installation take?
Most whole-house generator installations take 1–2 days.