What ARV actually means
After-repair value is what the house will be worth on the open market after all the work is done. If your house has dated kitchens and bathrooms and worn carpet, an investor is not pricing off what your house looks like today. They are pricing off what a comparable renovated house in your neighborhood just sold for.
The way investors get to that number is by pulling recent sales of homes in your neighborhood that match yours in size, beds, baths, and lot, but that have already been updated. Those sales are the comps that anchor the ARV.
If three updated 3-bed 2-bath homes in your subdivision sold in the last 90 days at $280,000, $285,000, and $290,000, the investor will probably use $285,000 as the ARV for your home. That is the number every other calculation flows from.
How investors get from ARV to your offer
The standard formula on a fixer is: offer equals 70 percent of ARV minus repair cost. Some investors use 75 percent. Some go lower in markets with thin margins or higher carrying costs. The 70 percent number is not arbitrary. It is the math that covers their rehab risk, six months of carrying cost, closing on both sides of the transaction, agent commission to resell, and a target profit of around 10 to 15 percent of ARV.
Worked example: ARV of $285,000, repair estimate of $35,000. Offer math is 0.70 times $285,000 minus $35,000, which equals $199,500 minus $35,000, which equals $164,500. That is your offer.
If the investor uses 75 percent instead of 70, the offer climbs to $178,750. If they think repairs are $25,000 instead of $35,000, the offer climbs again. Every variable in that formula is a place where the offer can move, which is why understanding ARV gives you leverage.
Why two investors give you different ARVs
Investors disagree on ARV because they pull different comps. One looks at the three most recent sales in your subdivision. Another expands the radius and pulls in five sales from the broader area. A third only counts sales within the last 60 days and ignores anything older.
Each method produces a different ARV. The spread is usually 5 to 10 percent of property value. On a $300,000 home that is $15,000 to $30,000 of swing, which translates directly into offer differences.
This is why three cash offers on the same home can land $30,000 apart even when every investor is doing honest math. They are not lying. They are just using different comps, which means different ARVs, which means different offers.
How to verify the ARV the buyer used
Ask the investor what ARV they used and what comps got them there. Any legitimate investor can tell you on the spot. They should be able to name three to five recent sales by address, with the square footage and condition of each.
Then go check those comps on Zillow or Redfin yourself. Look at the listing photos. If the comps the investor used are dramatically more renovated than what your house could realistically be brought up to, the ARV is inflated and your offer is artificially high (which usually means it will get retraded down at inspection).
If the comps are similar to what you would be after a reasonable rehab, the ARV is honest and the offer is what it is. Either way you now know enough to negotiate from facts instead of feelings.