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$1,950. That’s roughly what it costs to insure a $300,000 renovation properly for a year. But take on a fix-and-flip project anyway, and you are betting the entire profit margin on nothing going wrong for months at a stretch, with a crew coming and going and materials sitting inside an open, unlocked house. Most first-time flippers find out what their policy doesn’t cover after the fire, the theft, or the burst pipe, not before.
Builders Risk, an agency that has placed builders risk coverage in all 50 states for more than 26 years, sees this mistake constantly among first-time investors turning a single renovation into a real side business.
A homeowners policy stops the day you start swinging a hammer
A standard homeowners policy is priced for a house someone lives in. It assumes a family, a locked door every night, and a claims history built around ordinary life, not a construction site. The moment a property sits vacant or under active renovation, most of that coverage stops applying, even if the homeowner never realizes it until they need to file a claim.
Consider a Tulsa product manager who closes on a $215,000 duplex as a weekend project, guts both kitchens over four months, and lists the property eleven weeks after the crew packs up. The homeowners policy from the seller lapses at closing. The new owner’s dwelling coverage was never written for an open kitchen wall and a stack of lumber in the driveway. House flipping insurance fills that gap, covering the property from the day the new owner takes possession until the renovation is complete and the property is sold, even while it’s vacant or under construction.
ATTOM Data Solutions has tracked Texas, Georgia, and Ohio as the highest-volume flipping markets, and the average flip nationally now takes about 166 days from purchase to resale. That’s five and a half months of a property sitting outside what a personal lines policy was ever built to protect.
Renovation costs more to insure than a ground-up build, and the reason is structural
New construction on a clean lot runs about $0.30 per $100 of project value to insure, so a $500,000 new build costs roughly $1,500 a year. A renovation of similar value runs closer to $0.65 per $100, nearly double. A $300,000 rehab lands at approximately $1,950.
That difference isn’t random. It comes down to what insurers are covering. A new build starts with a clean slate and follows a fairly predictable construction process. A renovation is work performed inside a structure with plenty of unknowns behind every wall, like wiring of uncertain age, plumbing installed under different code, or framing nobody has inspected in decades. Water damage alone causes more renovation losses than fire, and carriers price the risk they can’t see accordingly.
The weeks before and after construction are their own exposure
A house flip doesn’t follow a linear path from occupied to under construction and back to sold. There’s usually a period after closing where the house sits empty while permits clear, and another period after the final inspection when it sits empty, while the owner waits on a buyer. Once a property goes unoccupied for 30 to 60 consecutive days, most standard policies start restricting or dropping coverage for that same period.
Vacant property insurance is the product designed for those windows. It runs about 0.78 percent of the property’s insured value per year, covering both the structure and the owner’s liability while nobody is living there. On a $287,000 property, that’s roughly $2,240 annualized, or down to a few hundred dollars when you account for the actual weeks the property sits vacant. Skipping it doesn’t remove the risk. It moves the risk onto whoever owns the house during those weeks, uninsured.
The policy pays for more than the fire
A builders risk or home renovation policy can cover more than most new investors assume. Beyond structural damage, it can reimburse architect fees, permit resubmissions, and financing charges that pile up while a damaged project sits on hold, expenses an owner would otherwise absorb out of pocket entirely. If a pipe bursts in month three and the project sits stalled for six weeks waiting on materials, the policy can cover the added carrying costs along with the physical damage.
Coverage also needs to match the project on paper, not the purchase price alone. An investor who buys a distressed $180,000 property for less than it would cost to rebuild, then insures it at the purchase price, is underinsured even before the renovation begins. Replacement cost, not acquisition cost, is what the policy should be based on.
One flip is a project. A second flip is a business, and the insurance should reflect that.
Everything changes once a flip stops being a one-time experiment. A single project might make it tempting to put insurance on the back burner until closing is right around the corner. A second or third project, run alongside a full-time job or as the whole plan, needs the same discipline any small business applies to risk: each project’s coverage should be reviewed based on its specific scope and circumstances, rather than simply reusing whatever worked last time. Not a template.
Picture a Charlotte marketing consultant who flips one house successfully, then takes on two renovations at the same time the following year, hiring a small crew for the first time instead of doing the work solo. The insurance conversation that made sense for one project, a single builders risk policy bought a week before demolition, doesn’t scale cleanly to two simultaneous jobs with subcontractors on-site. Each property needs its own policy based on the specific work being done, while having a crew on-site also brings additional liability concerns that weren’t there when the work was handled solo.
Before calling a broker, have four numbers ready: the purchase price, the estimated renovation budget, the property address, and the realistic timeline. Carriers price against the renovation scope and the schedule, not the address alone, so an investor who can answer those four questions in one phone call gets a usable quote faster than one who can’t.
Timing the policy is half the discipline
Builders risk premium is fully earned at inception, meaning there’s no refund for finishing early. The better approach is to choose a policy term that lines up with how long the project is expected to take, typically three, six, or twelve months, rather than a year of coverage as a comfort blanket on a four-month job. Extensions are usually straightforward as long as they’re requested before the policy expires and become a real problem after it lapses, since a half-finished renovation with no active coverage is a hard thing to re-quote quickly. Nobody wants that phone call.
The more serious mistake often happens before the renovation even starts. Some first-time flippers wait until renovation begins to bind coverage, leaving the property uninsured for the days or weeks between closing and demolition. The policy needs to be in place on the day title transfers, not the day the crew shows up.
$1,950 buys a year of protection on a $300,000 project. The house that burns, floods, or is stripped of copper during an uninsured gap week costs a great deal more than that, and it costs it exactly once.
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