The quote you were given when you bought your own house is not the quote that fits a flip. The house you are flipping has nobody living in it, no furniture, and a rotating cast of contractors with power tools.
Insurers treat all three of those as different risks, and they sell different policies for them.
Why is a flip not a homeowners policy?
Because a homeowners policy is written for the house you live in. North Carolina’s Department of Insurance puts the dividing line plainly: a dwelling fire policy “is typically used for someone that does not make the property their primary residence,” and it lists the properties it suits as vacation homes, vacant homes, seasonal homes, secondary homes, rental properties and older homes. A flip is the second and the sixth of those at the same time.
Insurance is regulated state by state, so the forms and the wording where you buy differ from the North Carolina description above. The shape of the decision does not.
What is a dwelling fire policy?
It is the policy built for a house that is not owner-occupied, and it is narrower than what you are used to. The National Association of Insurance Commissioners, the body the state regulators run between them, describes the form in its consumer guide to home insurance (2022): “The Dwelling Fire Form covers only your dwelling. It does not cover your personal property, personal liability or medical payments. It also covers only a few perils.”
Read that list twice, because two of those three absences matter on a job site. No personal liability and no medical payments means that if a neighbor’s child wanders into your gutted kitchen, the policy insuring the building is not the policy that answers for it. North Carolina’s regulator says the same thing: dwelling policies “typically do not provide liability coverage.” Liability is a separate purchase, and on a flip it is the one with people attached to it.
How much the building itself is covered for depends on which rung of the ladder you buy. The North Carolina page names three: “DP-1 is known as the basic form, DP-2 is known as the broad form and DP-3 is known as the special form,” and says each “provides a significantly different level of coverage.” DP-1 covers a short named list of perils. DP-3 is the widest. NAIC’s guide explains what “special” means in practice: a special form “insures your property against all perils, except those the policy specifically names as not covered,” and it adds that flood and earthquake are commonly among the named exclusions.
So the cheapest quote on a flip is usually cheap because it is a DP-1 with no liability attached. That is a real policy. It is just not much of one.
What is builder’s risk insurance?
It is the policy for a building that is being worked on rather than lived in. NAIC’s glossary of insurance terms defines builders’ risk policies as “typically written on a reporting or completed value form,” where “this coverage insures against loss to buildings in the course of construction.”
On a cosmetic flip, a dwelling fire policy plus liability often covers it. Once you are moving walls, replacing the roof structure or adding square footage, builder’s risk is the form written for that work, and it can cover materials sitting on site waiting to be installed. Which one your project needs is a question for a licensed agent who can read your scope of work, not a question to settle from a web page.
What does the premium do to the profit?
Take a flip bought at $185,000 with a $60,000 rehab, sold at a $330,000 after-repair value, held seven months. Closing costs on the purchase are 2%, selling costs are 8%, and the money is hard: 15% down at 10% interest with 2 points, with the rehab financed. Before insurance, holding costs run $780 a month in taxes, utilities, lawn care and alarm monitoring.
The first column insures it at $95 a month, which is roughly what the owner-occupied quote looked like. The second buys the dwelling fire policy with liability attached, at $310 a month. Both are the example’s own assumptions, not quotes anyone gave.
| At $95 a month | At $310 a month | |
|---|---|---|
| Sale price | $330,000 | $330,000 |
| Purchase price | −$185,000 | −$185,000 |
| Rehab | −$60,000 | −$60,000 |
| Closing costs on the purchase (2%) | −$3,700 | −$3,700 |
| Holding costs, 7 months | −$6,125 | −$7,630 |
| Loan points and interest | −$17,018 | −$17,018 |
| Selling costs (8%) | −$26,400 | −$26,400 |
| Profit | $31,757 | $30,252 |
These are example figures, not a quote.
The difference is $1,505, and it comes off the profit dollar for dollar: $31,757 becomes $30,252, and the return on the cash invested falls from 58% to 54%. That is the real trade. You are not choosing between $1,505 and nothing. You are choosing between $1,505 and a policy that may not pay for the thing that goes wrong.
It also compounds with time, which is the cost flippers underestimate most. At $310 a month, a flip that takes ten months instead of seven pays $930 more again, on top of three more months of interest and taxes. What each month of holding actually costs runs that arithmetic out.
Where does insurance go in the flip calculator?
There is no insurance box. The fix and flip calculator takes a single “Holding costs” figure in dollars a month, and the premium belongs inside it, alongside property tax, utilities and anything else the house costs you while you own it. That is what produced the $875 and $1,090 a month behind the two columns above.
Get the quote before you write the offer, not after you close, because a vacant-property premium on a house with no kitchen can come back at several times the number you assumed. If you are still sizing the deal, what a flip costs line by line and the 70% rule are where the rest of the stack lives.
Ask an agent three things: whether the policy stays in force while the house sits empty between contractors, what happens to it the day the rehab finishes, and what liability limit is attached and whether your contractors carry their own. Your state’s insurance department publishes the forms sold where you buy, and it will tell you what the words on them mean.