How to Calculate ARV Using Comparable Sales

You've found a potential deal, but you're not sure what it's really worth after repairs. That number — the after-repair value (ARV) — is the single most important figure in a wholesale deal. Get it wrong, and you either lose money or lose the deal. This guide shows you exactly how to calculate ARV using comparable sales, the same method appraisers and experienced investors use.

Key takeaways

• ARV is the estimated sale price of a property after all renovations are complete, based on comparable sales (comps).
• To find reliable comps, look for properties sold within the last 6 months, within 0.5 miles, with similar size, age, and features.
• Adjust the comp's sale price up or down to match your subject property's differences — this is where most mistakes happen.
• Use at least 3-5 comps and average their adjusted prices to get a solid ARV estimate.
• Avoid common pitfalls like using expired listings, ignoring market trends, or overestimating the value of upgrades.

What is ARV in real estate?

After-repair value (ARV) is the estimated market value of a property after all planned repairs and renovations are complete. It's the price a buyer would pay for the finished home. For wholesalers, ARV is the ceiling that determines your maximum allowable offer (MAO).

ARV is not a guess. It's based on what similar, recently sold properties (comps) have actually sold for. If you overestimate ARV, you'll overpay and your buyer won't be able to flip the house for a profit. If you underestimate, you'll lose the deal to a more aggressive wholesaler.

How do you find the right comparable sales?

Finding the right comps is the foundation of a good ARV. You want properties that are as similar as possible to your subject property after it's repaired.

What makes a good comp?

A good comparable sale checks these boxes:

• Sold, not listed. Only use sold properties. Listings are asking prices, not market reality.
• Recent. Sold within the last 6 months. In a fast-moving market, 3 months is even better.
• Close. Within 0.5 miles for suburban areas, 1 mile for rural. The closer, the better.
• Similar size. Within 10-20% of the subject's square footage. Bigger differences need big adjustments.
• Similar age and style. Same decade of construction and similar architectural style (ranch, colonial, etc.).
• Similar condition. You want comps that are already in the condition your subject will be after repairs.

Tip: Use public records, MLS data, or paid tools like PropStream or DealMachine to find sold comps. Many counties offer free online property search.

How many comps do you need?

Use at least 3 to 5 comps. Fewer than 3 and your estimate is too risky. More than 5 is usually overkill, but in a market with many similar sales, 6-7 can strengthen your average.

How do you adjust comparable sales for differences?

No two properties are identical. You adjust the comp's sale price up or down to account for differences with your subject property. The goal is to answer: "What would this comp have sold for if it were exactly like my subject property?"

What adjustments do you make?

Common adjustments include:

• Square footage. Adjust by the market's price per square foot for the difference in size.
• Bedrooms and bathrooms. Each extra bedroom or bath adds value — typically $5,000–$15,000 depending on the market.
• Garage. A two-car garage is worth more than a one-car or no garage.
• Condition. If the comp is in better condition than your subject will be after repairs, subtract value. If worse, add.
• Lot size. Larger lots add value, but only up to a point.
• Location. A comp on a busy street is worth less than one on a quiet cul-de-sac.

Warning: Avoid over-adjusting. If you need more than 5 adjustments, the comp is probably not a good match. Find a better one.

How do you calculate the adjustment amount?

Use the market's price per square foot for size differences. For other features, use local market data or your experience. A simple method: find the average price per square foot from your comps, then multiply by the difference in square footage.

Example: Your subject is 1,500 sq ft. A comp is 1,400 sq ft and sold for $200,000. The market's price per sq ft is $143. The comp is 100 sq ft smaller, so you add $14,300 to its sale price ($143 × 100). The adjusted price becomes $214,300.

What's the best way to calculate ARV step by step?

Follow these steps to get a reliable ARV:

1. Identify 3-5 good comps using the criteria above.
2. List each comp's sale price, date, and key features (sq ft, beds, baths, garage, condition, lot size).
3. Adjust each comp's price for differences with your subject. Add value if the comp is inferior, subtract if superior.
4. Calculate the adjusted price per square foot for each comp (adjusted price ÷ sq ft).
5. Average the adjusted prices (or the adjusted price per sq ft) to get your ARV.

Example scenario

Let's say your subject property is a 3-bed, 2-bath, 1,500 sq ft ranch built in 1980. After repairs, it will be in good condition with a one-car garage. You find three comps:

Comp	Sale Price	Sq Ft	Beds	Baths	Garage	Condition	Adjustments	Adjusted Price
A	$210,000	1,450	3	2	1-car	Good	+$7,000 (size)	$217,000
B	$225,000	1,600	3	2	2-car	Good	-$14,300 (size) -$5,000 (garage)	$205,700
C	$200,000	1,500	3	1	1-car	Good	+$10,000 (bath)	$210,000

Average adjusted price = ($217,000 + $205,700 + $210,000) ÷ 3 = $210,900. So your ARV is approximately $211,000.

Tip: Always round to the nearest $1,000 or $5,000. Appraisers typically round to the nearest $1,000.

What are common ARV mistakes wholesalers make?

Even experienced wholesalers slip up. Here are the most common errors:

Using list prices instead of sold prices

List prices are not market value. A property can be overpriced or under-priced. Always use sold data.

Ignoring market trends

If the market is declining, recent comps may overstate future value. If rising, older comps may understate it. Adjust for trends or use the most recent comps.

Overestimating the value of upgrades

Granite countertops and hardwood floors add value, but not dollar-for-dollar. In many markets, a kitchen remodel recoups only 60-80% of its cost. Be conservative.

Using comps that are too far away

A property 2 miles away in a different neighborhood is not a good comp. Location is the #1 value driver.

Forgetting to adjust for time

If the market has changed since a comp sold, adjust its price by the monthly appreciation or depreciation rate. For example, if the market appreciates 1% per month, a comp sold 6 months ago should be increased by 6%.

How do you use ARV to determine your offer price?

Once you have ARV, you can calculate your maximum allowable offer (MAO). The formula is:

MAO = ARV × 0.70 – Repair Costs

The 70% rule is a common guideline for fix-and-flip investors. It ensures they have enough margin for holding costs, closing costs, and profit. Your buyer may use a different percentage, but 70% is a safe starting point.

Example: ARV = $211,000, repairs = $30,000. MAO = $211,000 × 0.70 – $30,000 = $147,700 – $30,000 = $117,700. That's the most you can offer and still leave room for your assignment fee.

Tip: Always confirm your buyer's target ARV-to-value ratio. Some use 65%, others 75%. Know your end buyer's criteria.

What tools can help you calculate ARV faster?

While you can do everything manually, several software tools speed up the process:

• PropStream – Provides sold comps, estimated ARV, and repair costs.
• DealMachine – Offers ARV estimates and comp analysis on the go.
• REIPro – Includes a built-in ARV calculator and deal analyzer.
• Spark Rental – Good for rental ARV, but also works for flips.

These tools pull from public records and MLS data, giving you a head start. But always verify their numbers with your own comp analysis.

How do you verify your ARV with an appraiser or realtor?

If the deal is large or the market is tricky, get a second opinion. A local realtor who specializes in the area can run a comparative market analysis (CMA). An appraiser can give you a formal opinion, but that costs money.

Tip: Build relationships with 2-3 agents who know your farm area. They can often run a quick CMA for free if you send them deals regularly.

Recommended tools / next steps

Now that you know how to calculate ARV, put it into practice. Start by pulling comps for a property you're considering. Use a tool like PropStream or DealMachine to speed up the search, but always double-check the adjustments yourself. Then calculate your MAO and see if the numbers work. For more resources, check out our directory of real estate software to find the best ARV calculator and deal analysis tools for your wholesaling business.

Warning: Never rely on a single comp or a tool's automated ARV without manual verification. Automated estimates can be off by 10% or more.

Mastering ARV takes practice. The more comps you analyze, the better your intuition becomes. Start today with a small deal, and you'll build the skill that separates successful wholesalers from the rest.