The Quick Read: Few nearby sales do not disqualify a home from a conventional loan. Fannie Mae and Freddie Mac ask the appraiser for three closed comparable sales, but they let the appraiser reach for older, farther, or less similar sales when the market is thin. The appraiser has to explain each choice and adjust for the differences. What decides your file is how well that explanation holds up.
Key Takeaways
- The guides call for at least three closed comparable sales. They do not set a minimum number of sales within a set distance or time.
- The 12-month age benchmark is a guideline. Older sales can be used when they are the best evidence and the appraiser explains why.
- Rural homes, unusual homes, and new subdivisions most often land in thin-comp territory.
- The loan is sized on the lower of the price or the appraised value, so a thin, weak report can mean more cash from you.
- If the value looks unsupported, you can ask for a reconsideration of value.
What Does the Appraiser Actually Have to Do?
The appraiser has to find the best available evidence of value and explain the choices. That is the whole standard. It is not a count of sales inside a mile, and it is not a six-month window.
Conventional payment estimate
The starting figures are an example price at the first-time buyer’s minimum down payment. Replace them with yours.
Editable benchmark: 7.32% as of October 22, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a conventional loan quote.
Estimate seeded at the low end of Fannie Mae’s published range (0.58%–1.86% a year); the insurer prices the actual premium on the score and the leverage. Applies only above 80% loan-to-value.
Illustrative starting assumptions: a $350,000 price, the first-time buyer’s minimum down payment, a thirty-year term at the current Freddie Mac benchmark, mortgage insurance at the low end of Fannie Mae’s published range, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a conventional loan quote; your rate is set by the lender at lock. The mortgage insurance figure is an editable estimate seeded from Fannie Mae’s published typical range, not a premium quote; the insurer prices the actual premium, and the cancellation month assumes scheduled payments with no extra principal and no change in value. Taxes, insurance and dues are editable estimates; closing costs are not included. Conforming loan limits apply by county. Licensed in sixteen states for consumer mortgages.
The Fannie Mae Selling Guide section on comparable sales calls for a minimum of three closed comparables in the sales comparison approach. The appraiser picks the ones that are best and most appropriate, with similar physical and legal characteristics. They need not be identical. They should be competing homes that appeal to the same buyers who would consider yours.
Freddie Mac says the same thing in its sales comparison approach section. The report must contain at least three comparable sales, and it may add pending sales and current listings to support the value opinion.
Here is the part borrowers rarely hear. Both agencies expect thin markets to exist. Their guides say what to do when they do.
Key Terms Defined
Comparable sale (comp): A recently sold home similar enough to yours that buyers would weigh the two against each other.
Adjustment: A dollar change the appraiser makes to a comp’s price to account for a difference, such as size, age, or lot.
Appraised value: The appraiser’s professional opinion of what the home is worth. The lender uses the lower of this figure or the price to size the loan.
Appraisal waiver: A decision to skip the appraisal. Fannie Mae calls it value acceptance.
Reconsideration of value (ROV): A formal request that the lender take a second look at a value you believe is unsupported.
Loan-to-value (LTV): The loan amount divided by the home’s value or price, whichever is lower.
How Far Can a Comp Stretch?
A comp can be older, farther away, or less similar than usual, as long as the appraiser justifies it in the report. The agencies set the limits through explanation, not through fixed numbers.
| Factor | Usually preferred | Allowed with explanation |
|---|---|---|
| Age of sale | Within about 12 months | Older sales that best indicate value |
| Location | Same market area | Competing neighborhoods |
| Similarity | Close match | Different, if differences are described |
| Sale status | Closed sales | Pending sales and listings as support |
Take each row in turn.
Age. The 12-month figure in Fannie Mae’s guide is a benchmark, not a hard stop. In a rural area with minimal activity, the appraiser may not find three truly comparable sales in a year. Older sales that are the best indicator of value can be used. Fannie Mae’s appraisal and property FAQ adds that the best sale is not always the most recent one.
Location. Comps from the same market area come first. Comps from competing neighborhoods are allowed, but the appraiser must not stretch the neighborhood boundaries to include them. The report explains how the competing neighborhood compares to yours.
Similarity. Significantly different comps can work if the appraiser describes the differences and justifies using them. Where truly comparable sales are scarce, the guide says the appraiser may have to use properties that are not truly comparable.
Sale status. Closed sales carry the weight. Pending sales and active listings show current market behavior. For unique homes, the Fannie Mae FAQ says an aged settled sale can qualify as a comparable, while a listing or a sale under contract serves as a supplemental exhibit to show marketability.
How Does the Search Widen When Sales Are Thin?
The appraiser loosens the search in steps, then explains each step. There is no single mandated order, but the pattern is familiar.
1. Widen the area. The appraiser looks beyond the immediate neighborhood, first to the broader market area and then to competing areas.
2. Reach further back in time. Older sales come in when they are the best evidence, with the market change since then accounted for.
3. Accept less similar homes. A home with a different size, age, or style can serve if the appraiser adjusts for it.
4. Add supporting exhibits. Pending sales and listings help show where the market is heading.
5. Write the narrative. Every unusual choice gets explained in the report.
Neither agency sets a maximum distance for rural comps. Freddie Mac says rural reports may contain older sales, sales a considerable distance away, or sales that are not ideally similar. The report must justify them and adjust for the differences.
What About Large Adjustments?
Thin markets produce big adjustments, and that is not automatically a problem. Freddie Mac notes that large adjustments typically occur in rural markets and with unique properties because of limited market activity. It does not cap gross or net adjustment percentages.
Fannie Mae’s guidelines treat adjustment limits differently from what many borrowers expect, so the Selling Guide and the lender’s own overlays are the places to confirm the current position.
What matters is support. An adjustment should reflect how the market actually reacts to a difference. Underwriters read the report for exactly that: whether the comps are well chosen and the adjustments are logical.
How Is a Conventional Loan Underwritten When Comps Are Thin?
The deal works through the same steps as any other, but two of them need more attention. Across the wholesale programs Lendmire places files with, thin-comp files tend to get their closest look at the appraisal review.
1. The valuation path is chosen. The agencies’ automated systems decide whether the file qualifies for an appraisal waiver or needs a full appraisal. A waiver depends on data already in the agencies’ databases. A thin comp history makes a waiver less likely, so expect a full appraisal on a thin-market home.
2. The lender orders the appraisal from an independent appraiser. Lenders cannot interfere with the appraiser’s judgment, and they must send you a copy of the report, per the CFPB’s consumer guidance on appraisals.
3. The appraiser builds the comparison and writes the explanations described above.
4. The underwriter reviews the report for reasonableness. Are the comps supported? Do the adjustments make sense?
5. You receive the report. If the value looks unsupported, you can ask for a reconsideration.
6. The loan is sized on the lower of price or value.
Three things decide how step 4 goes: the quality of the appraiser’s explanation, how well the comps bracket your home, and the size and support of the adjustments. Local knowledge matters too. Freddie Mac says the appraiser must be knowledgeable about conditions in the geographic area.
Where the Rule Bends: Named Edge Cases
Thin-comp files cluster in a few property types. Each has its own valuation risk and its own kind of helpful evidence.
| Situation | Main valuation risk | Evidence that helps |
|---|---|---|
| Rural, low-turnover area | Old or distant comps | Clear explanation of search |
| Unique or non-traditional home | No similar design nearby | Proof the design sells locally |
| Outbuildings, odd features | Value of extras unclear | Contributory-value support |
| New subdivision or project | Few closed sales yet | Sales from outside the project |
Rural and low-turnover areas. Both agencies expressly allow older, distant, and less similar comps with justification. This is the classic thin-comp case.
Unique homes. Log homes and earth-berm homes are examples. The report must show that the improvements are acceptable in the market. Both agencies say they will buy a mortgage on a unique property, or one that does not conform to its neighborhood, if the appraiser evaluates and reports how market-area characteristics and unique features affect value and marketability.
Properties with outbuildings. A barn or similar structure is judged on what it contributes to value. A minor one may add little and cause little trouble.
New subdivisions, condos, and planned communities. Earlier appraisal guidance asked for at least one closed sale from inside the project and one from outside, with pending sales allowed to stand in when closed sales did not yet exist. Rules for projects change, so ask your loan officer what the current guide requires.
When Even Stretching Isn’t Enough
Sometimes the appraiser cannot find enough evidence to support a credible value. The practical result is that the property may not work as security for that loan. This is rare, and it is not the default for a rural or unusual home.
If it happens, the choices are plain. The lender may ask the appraiser to add support. You may ask for a reconsideration with better comps. The deal may be restructured with more cash. Or you may decide to walk away, if your contract allows it.
What Does This Do to Your Loan?
Value caps the loan. If the appraisal comes in under the price, the loan is sized on the lower figure. The gap becomes more cash from you, a renegotiated price, or a canceled deal.
Here is a worked picture with no dollar figures. Say you are buying a rural home with a first-time-buyer conventional purchase loan at 97% LTV, which is 3% down on a one-unit primary residence. The home appraises below the price. The 97% now applies to the lower value. Your down payment, as a share of the price, rises. Move the same file to the standard 95% LTV path with 5% down and the same logic holds: the lower number governs. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
The CFPB says it is very risky to buy a home for more than the appraised value. The lower value can be used to negotiate the price down. If the seller will not budge, you may be able to cancel, though costs can apply depending on your contract. Consider talking to an attorney.
Leverage also affects mortgage insurance. Across the conventional programs we place files with, mortgage insurance is required above 80% LTV. You can request cancellation at 80% of the original value, and the servicer must end it automatically at 78%. A lower appraised value pushes your starting LTV up, which can keep insurance in place longer. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
If you are refinancing, the appraised value is the equity ceiling. A one-unit primary residence cash-out refinance tops out at 80% LTV, so a thin or low value limits how much cash comes out. A rate-and-term refinance on that same home can reach 95% LTV, with mortgage insurance above 80%. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
One note on occupancy: if the home is a second home or a rental, the leverage caps change, so tell your loan officer early.
Does a Thin-Comp Appraisal Cost More or Take Longer?
It can. From working these files, a thin-comp appraisal often means more work for the appraiser, and that can show up in the fee. Fees vary by market and property, so ask your loan officer what to expect. The Loan Estimate shows the appraisal fee as quoted at application.
Can You Dispute the Comps?
Yes, through a reconsideration of value. Both Fannie Mae and Freddie Mac require lenders to have a policy that lets borrowers appeal when they believe the value is unsupported, deficient because of unacceptable appraisal practices, or reflects prohibited discrimination. See Fannie Mae’s announcement SEL-2024-03 for the framework.
Some practical points:
- Fixable: a missed comp you can name, an error in the home’s facts such as square footage or a finished basement, or a stronger comp the appraiser did not see.
- Judgment calls: which of several reasonable comps to weight most, and how much to adjust for a difference. These are hard to win.
- No guarantee: the lender is not required to change the value. It must still ensure the report and value are reliable and adequately supported.
Disclosure timing of the ROV process changed in September 2025. The GSEs removed the requirement to disclose at application, and it now goes out with delivery of the appraisal report. Ask your lender how it handles requests, since processes differ.
A second appraisal is a different thing. A lender is not obligated to order one, and its cost will likely be passed to the borrower.
Your Copy of the Report
You are entitled to see it. Under the federal rule that governs appraisals, the lender must tell you in writing of your right to a copy. Per the CFPB’s compliance guide, that notice is due within a set period after application. The copy is due promptly on completion, and the timing relative to closing depends on the file and the lender.
Action Checklist
Before the appraisal is ordered
- Tell your loan officer if the home is rural, unusual, or in a new subdivision.
- Gather permits, upgrade records, and any sales you know of nearby.
- Ask whether a waiver is realistic. On a thin-market home, expect a full appraisal.
During the appraisal
- Make the home accessible and share your improvement list with the appraiser through your lender.
- Do not ask the loan officer to push a number. Lenders cannot interfere with the appraiser.
After the report
- Read the comps. Check the home’s facts.
- If the value is low, decide among renegotiating, adding cash, or requesting a reconsideration.
- Keep in mind that guidelines change. The agencies’ guides are the authority.
Is Your Home Likely to Be a Thin-Comp File?
Ask yourself four questions. Are home sales rare where you are buying? Is the home unlike most others nearby? Is it on acreage or outside a town? Is it in a project with few closed sales yet? Two or more yes answers means plan for extra explanation in the report. That is a reason to start early, not a reason to give up.
Lendmire’s conventional loan programs cover the purchase paths discussed above, subject to lender guidelines and full file review. Typical wholesale conventional files start at a 620 decision score, with a total ratio ceiling of 50% on most automated findings.
If your plan includes pulling cash out later, Lendmire’s piece How an Appraisal Changes What a Conventional Cash-Out Refinance Lends walks through the equity side.
Frequently Asked Questions
Is there a minimum number of comps?
Yes: three closed comparable sales, per both Fannie Mae and Freddie Mac. There is no minimum number within a certain distance or time. The appraiser may add pending sales and listings as support.
Can the comps be older or farther away?
Yes, with justification. The 12-month benchmark is a guideline, and neither agency sets a maximum distance for rural properties. The appraiser must explain why the particular comps were chosen and adjust for the differences.
Can I choose the appraiser?
No. The lender orders the appraisal from an independent appraiser, and lenders must not interfere with the appraiser’s judgment. You can share information about your home through your lender, but you cannot steer the value.
Can the appraisal be waived?
Sometimes. Fannie Mae calls a waiver value acceptance, and it depends on appraisal data already in the agencies’ databases. A thin comp history makes a waiver less likely, so a rural or unusual home is often steered to a full appraisal.
What if the value comes in low?
The loan is sized on the lower number, so you can renegotiate the price, bring more cash, or ask for a reconsideration of value. The lender is not required to change the figure. Your contract determines whether you can cancel.
If you are buying a home and want to see whether a conventional loan fits your file, Lendmire can help you compare the options and what each one asks of the file.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and home buyers in 16 states with FHA, VA, conventional and jumbo purchase and refinance loans arranged through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and the agency guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Fannie Mae Selling Guide B4-1.3-08, Comparable Sales
2. Freddie Mac Seller/Servicer Guide 5605.6, Sales comparison approach
3. Fannie Mae Appraisal and Property FAQ
4. CFPB: My appraisal is less than the sale price
This article is part of Lendmire’s conventional loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Can You Get a Conventional Loan on a Primary Home? · Conventional Loan Requirements for a Non-Working Spouse · Conventional Loan Escrow Waiver Requirements for a Primary Home
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.