Key takeaways
- Installed whole-house standby generator projects commonly land somewhere around 7,000 to 15,000 dollars as general market context, not a Wattsmith quote. The unit is often under half of that.
- The line items that move the number most are the transfer equipment, the gas supply, the pad and the distance from the generator to the panel.
- Fuel decides more than brand does. Natural gas needs a supply line sized for the load; propane needs a tank, a pad and a delivery relationship.
- A standby generator is permitted electrical work in San Antonio, and gas work brings its own inspection alongside the electrical one.
Search the price of a whole house generator and you will find the price of a generator. Manufacturers publish it, retailers list it, and it is a real number: unit prices commonly run from a few thousand dollars for a small air-cooled standby up to noticeably more for a large one, as general market context rather than a quote from us.
It is also the half of the job that arrives on a pallet. Two quotes on the same house can differ by thousands with an identical generator on both, and the difference is entirely in the other half.
What the install actually consists of
- Transfer equipment. Either an automatic transfer switch or, on a smaller scope, an interlock. This is the part that makes it impossible to be connected to the generator and the utility at once.
- A gas supply. Natural gas means a line sized for the generator's demand at the pressure it needs. Propane means a tank, a pad, a regulator and somewhere for a truck to get to.
- A pad and a location. The unit needs a level base, clearance around it per the manufacturer's listing, and a position that is not under a window or against a wall it is not rated to sit against.
- The electrical run. Conductors and conduit from the generator to the transfer equipment and into the panel, sized for the load and the distance.
- Permits and inspections, electrical and usually gas.
- Commissioning. Load testing, exercise schedule, and confirming the thing actually starts and transfers when the power drops rather than the first time you need it.
The two line items that move the number most
Gas supply is the first. A standby generator has a demand figure the manufacturer publishes, and the existing line to a house sized for a furnace, a water heater and a range is frequently not adequate to add it at full output. Correcting that can mean a larger meter, a larger run, or both, and it is the item most likely to make a quote you were not expecting.
Distance is the second. A generator that has to sit at the far corner of the lot for clearance or noise reasons drags a long conductor run behind it, and conductor sized for a whole-house load over a long distance is not a trivial cost. Where the unit can go is often decided by the gas meter, the panel and the setbacks rather than by preference.
Sizing, briefly, because it changes the price
Sizing is its own subject and it interacts with cost directly: a unit that covers the whole house costs more than one that covers a chosen set of circuits, and the honest question is which circuits actually have to stay up. That decision, and the difference between a transfer switch and an interlock, is covered in generator interlock or transfer switch and in generator options for San Antonio homes.
The pattern worth knowing is that a managed load approach, where a few large loads are shed rather than powered simultaneously, often lets a smaller generator cover a house that looked like it needed a larger one.
What we will not do to the number
We quote one flat price for the whole scope before the work starts, and that price includes the parts of the job that are easy to leave off a low bid. A quote that covers the generator and the electrical but stays quiet about the gas line is not cheaper. It is incomplete, and the difference arrives later.
If we open something up and find a condition nobody could see from the driveway, we price it and get your approval before touching it.
What to ask any bidder
- Is the gas supply included, and have you confirmed the existing line can carry the unit at full demand?
- What transfer equipment is in the price, and is it automatic?
- How far is the run from the generator location to the panel, and is that conductor in the quote?
- Which permits are you pulling, and does the price include the inspections?
- What happens to the price if the meter has to be upgraded?
Outage exposure is not even across the metro, and the areas where a standby unit gets asked about most are the ones with the longest restoration times. We wrote that up for the northern edge in generator readiness in Timberwood Park and Bulverde. If a standby unit is on the table for your house, generator installation is where we start, usually with whether the panel is in shape to support it.