Buying guide
Can you roll a generator into a mortgage or construction loan?
Often, yes — and the timing matters more than the product. A generator financed inside a build costs less and borrows cheaper than the same generator added two years later. Here are the routes, what each one needs from us, and the one most people should not take.
Why timing beats the interest rate
A standby generator install is mostly trenching, conduit, a gas line and a pad. During construction all of that is already open, already scheduled, and already being paid for by somebody. Adding the generator to that scope is incremental. Adding it after the landscaping is in means cutting it back open.
That is the real saving, and it dwarfs a point of interest either way. If you are building or doing a substantial renovation and a generator is anywhere on your list, this is the moment to price it. What the installation actually involves is here.
The four routes, ranked by when they make sense
1. Inside a construction loan
The cleanest option if you are building. The generator becomes a line in the build budget, drawn like any other allowance, and it is financed across the life of the permanent loan rather than paid in cash at the worst possible moment. Your builder will want our itemized bid early enough to fold into the schedule of values.
2. Inside a renovation mortgage
Renovation products that fund permanent improvements — FHA 203(k) and Fannie Mae HomeStyle being the common ones — generally treat a permanently installed standby generator as eligible, because it is affixed to the property and conveys at sale. Your lender decides, and they will want a contractor bid with a license number on it.
3. Home equity loan or HELOC
For an existing home with equity, this is usually the lowest-cost borrowing available and it does not touch the first mortgage. The trade is that it is secured by the house and the draw period has its own arithmetic. Worth pricing against option four rather than assuming it wins.
4. A straight home improvement installment loan — or Affirm on the equipment
Unsecured, fast, no appraisal, no closing costs, and it does not put a lien on the property. At this ticket size it is what most of our customers actually use, and a rate check does not affect your credit.
There is also a route that skips the application entirely for the largest single line: the generator itself can be bought on this site and paid monthly with Affirm, chosen at checkout like any other payment method, over 3 to 36 months. It funds the equipment only — installation is quoted separately after a survey — but it puts the biggest number on a fixed monthly payment without waiting on an underwriter. How both work.
The route to be careful with: refinancing an existing mortgage purely to fund a generator. At $13,500 to $17,000, closing costs frequently swallow the rate advantage, and giving up a low fixed rate to buy an improvement is an expensive trade. Do the arithmetic before anyone talks you into it.
The middle path nobody mentions: pre-wire now, unit later
If the budget will not stretch to the generator during the build, install the infrastructure anyway — the automatic transfer switch, the pad, the conduit run and the gas stub. That is the part that is disruptive and expensive to retrofit. Adding the generator afterwards becomes a connection rather than a project, and the infrastructure is financed inside the build where it belongs.
We quote this as a standalone scope for builders and for homeowners who know a generator is coming eventually. Transfer switches are here.
What your lender will ask us for
Every route above except the unsecured loan needs paperwork from the installer, and it is always the same three things: an itemized bid on letterhead separating equipment, labor and permits; the Texas electrical contractor license number; and a current certificate of insurance. We issue all three without being chased, because a quote that stalls in underwriting helps nobody.
One more thing worth saying plainly: the install must be permitted and inspected. An unpermitted generator is a disclosure problem at resale and a coverage problem with an insurer, and no financing route makes that go away. What your city can and cannot require.
Financing questions
Can a generator be included in a construction loan?
Yes, and it is the cheapest time to do it. A generator installed during construction shares trenching, conduit, gas line and slab work that would otherwise be billed separately later. The cost is drawn against the build like any other allowance item, so it is financed over the life of the loan rather than paid out of pocket.
Can I add a generator to a renovation mortgage?
Generally yes. Renovation loan products that fund permanent improvements to the property — FHA 203(k) and Fannie Mae HomeStyle among them — treat a permanently installed standby generator as an eligible improvement, since it is affixed to the property and conveys at sale. Your lender makes the final call, and they will want an itemized contractor bid. We provide one written for that purpose.
Is it worth refinancing my mortgage to pay for a generator?
Usually not. At a $13,500 to $17,000 ticket, closing costs on a refinance often eat the interest-rate advantage, and resetting a low-rate mortgage to fund an improvement is an expensive way to borrow. A home equity line or a straight installment loan is normally the better arithmetic. Run both before deciding.
Do I need a generator installed before closing, or can I pre-wire?
You can pre-wire. Installing the automatic transfer switch, the pad, the conduit and the gas stub at build time and adding the generator later is a legitimate middle path — the expensive, disruptive work is done while the walls are open, and the later install becomes a connection rather than a project. It also lets a buyer finance the infrastructure inside the build and buy the unit when they are ready.
Will a generator appraise?
A permanently installed, permitted standby generator is a fixture and is normally treated as part of the property. Whether an appraiser assigns it dollar-for-dollar value is a separate question, and you should not assume full cost recovery. What reliably matters is that it was permitted and inspected — an unpermitted generator is a title and disclosure problem regardless of what it cost.
Can I just pay monthly for the generator itself?
Yes, and it is the fastest route. Equipment on this site can be paid monthly with Affirm at checkout over 3 to 36 months, with a soft credit check and no application to chase. It covers the equipment, not the installation, and Affirm caps a single transaction at $30,000 including freight and tax. Full detail here.
What does the lender need from the installer?
An itemized bid on contractor letterhead showing equipment, labor, permits and total; the contractor license number; and proof of insurance. As a licensed Texas electrical contractor we issue all three as a matter of course. Request a lender-ready quote.
Need a bid your lender will accept?
Tell us it is going to underwriting and we will itemize it accordingly, with the license number and insurance certificate attached. The survey is free either way.