There is no fixed answer to how far appraisers look for comps. The one-mile radius and six-month window you hear about are industry conventions, not rules set by Fannie Mae, Freddie Mac, FHA, or the VA. What the guidelines actually require is that every comparable sale share your property’s market appeal, and that the appraiser explain in writing whenever a more distant or older sale was the best available evidence of value.
The One-Mile Rule Is a Habit, Not a Regulation
Fannie Mae’s selling guide never states a maximum distance. It requires the appraiser to report each comparable’s distance “in terms of miles” with a directional indicator, such as “1.75 miles NW,” measured as a straight line between the properties. When the best indicators of value are “a considerable distance away,” Fannie Mae allows those sales as long as the appraiser explains why they were selected and the result is credible.1Fannie Mae. Comparable Sales
Freddie Mac takes the same approach. Its guide asks appraisers to select comps from the subject’s neighborhood or a competing neighborhood, then explain any location differences. The VA has stated outright that it “does not set minimum or maximum distance requirements” between the subject and comparable sale properties.2Veterans Benefits Administration. Clarification of Locational Requirements of Comparable Sale Properties for VA Appraisals
What matters more than raw mileage is where the market breaks. A highway overpass, a river, a school district line, or a sharp change in zoning can create a price divide between two streets 200 yards apart. An appraiser who crosses one of those lines for a convenient comp will produce a less reliable valuation than one who drives five miles in the same direction to find a sale in the same market. The guideline every agency effectively imposes is the same: pick comps that compete for the same pool of buyers as the subject property, and document your reasoning when you have to reach further out.
How Recent Do the Sales Have To Be
Time limits are slightly firmer than distance limits. Freddie Mac’s guidelines state that comparable sales should have closed within 12 months, and the appraiser must provide commentary explaining the use of any sale older than six months.3Freddie Mac. Guide Section 5605.6 Fannie Mae requires the appraiser to report each comparable’s 12-month sales history on the appraisal form and strongly favors recent transactions.4Fannie Mae. Sales Comparison Approach Section of the Appraisal Report
A sale from three weeks ago carries far more weight than one from ten months ago. A recent closing reflects today’s interest rates, buyer demand, and inventory. A sale from nearly a year back may reflect a very different lending environment, especially during periods of rapid price movement. The appraiser can still use it, but they need to apply a time adjustment for how the market shifted between that closing and the effective date of the current appraisal.
FHA takes a broader view on historical data. Appraisers must research prior sales of comparable properties going back three years from the effective date of the appraisal. That does not mean a three-year-old sale carries much weight in the final value conclusion. FHA wants the appraiser to see the full transaction history so they can spot flips, unusual price swings, and other red flags.
Why Rural and Urban Searches Look Nothing Alike
In a dense urban market with rows of similar condos or townhomes, the appraiser may not need to look beyond a few blocks. High transaction volume means recent, closely matched sales sit right there in the data. The challenge is often choosing among too many options.
Rural properties flip the problem. A ranch-style home on 44 acres might have no truly similar recent sale within 20 miles. Freddie Mac’s own guidance acknowledges this, noting that the most relevant comps for a large-parcel property might be two-story homes on 6-to-12-acre lots located 8 to 18 miles away.5Homebuyer.com. Freddie Mac Guidelines: Sales Comparison Approach in Appraisals When that happens, the appraiser has to explain why those distant sales were selected and describe how the competing market compares to the subject’s location.
This is where the one-mile, six-month shorthand breaks down completely. A home on 40 acres cannot be compared to a subdivision lot two miles away even though the distance is short, because the two properties attract fundamentally different buyers. The appraiser’s job is to match functional utility (acreage, well versus municipal water, outbuildings, road access) even if that means stretching the radius well beyond what works in a suburb. Similarity outranks proximity when the two conflict.
How Appraisers Adjust Distant or Older Comps
No two homes are identical, so every comparable sale gets adjusted to bridge differences with the subject property. Adjustments translate real differences into dollar amounts and apply to location, size, condition, lot area, features like a garage or pool, and the date of sale. Fannie Mae does not cap the total dollar amount of adjustments, but warns that when adjustments become large enough to suggest the property “may not conform to the neighborhood,” the lender’s underwriter needs to confirm the value conclusion is still supported.6Homebuyer.com. Fannie Mae Guidelines: Appraisal Adjustments to Comparable Sales
Time adjustments matter most when a comp is old. If the market appreciated 8% over the past year and a comp sold nine months ago, the appraiser adjusts that sale price upward to reflect current conditions. Fannie Mae allows several methods for calculating this: home price indices, statistical analysis, paired sales analysis, or other commonly accepted tools. The report must describe which method was used and summarize the supporting evidence.7Fannie Mae. Adjustments to Comparable Sales
Location adjustments work the same way. If the best available comp sits in a slightly less desirable school district or a neighborhood with lower median incomes, the appraiser adds or subtracts dollars to bridge that gap. The adjustments have to be market-based, meaning they reflect what actual buyers pay for those differences rather than a rule of thumb. An appraiser who applies a generic $20-per-square-foot size adjustment when market data supports $100 per square foot will produce a report that gets challenged during underwriting.
How Loan Type Changes the Scrutiny
The loan program shapes how tightly comp selection gets reviewed, even though no program imposes a rigid distance cap.
- Conventional (Fannie Mae and Freddie Mac): Comps should come from the subject’s neighborhood or a competing one. Sales older than six months need written commentary under Freddie Mac’s guide. Fannie Mae requires the appraiser to explain why any comp from outside the market area was selected and make location adjustments if warranted.1Fannie Mae. Comparable Sales
- FHA: Follows the same general preference for nearby, recent sales but requires the appraiser to research comparable sale histories going back three years. FHA also enforces Minimum Property Requirements, so the home’s physical condition can trigger additional scrutiny beyond comp selection.8U.S. Department of Housing and Urban Development (HUD). SFH Handbook 4000.1
- VA: The VA Lender’s Handbook says comparable sales “should be located as close to the subject as practical.” In suburban or rural areas where suitable comps may be many miles away, the appraiser should explain why those sales were used, describe the market area, and note whether locality adjustments were applied.2Veterans Benefits Administration. Clarification of Locational Requirements of Comparable Sale Properties for VA Appraisals
All three programs require compliance with the Uniform Standards of Professional Appraisal Practice (USPAP), which governs how appraisals are developed and reported nationwide. USPAP itself does not set distance or time limits for comps. It requires the appraiser to “analyze such comparable sales data as are available to indicate a value conclusion” and to research the subject property’s own sale history going back three years. The real enforcement mechanism is the underwriter reviewing the finished report. If the comps look like a stretch, the lender can reject the appraisal or request additional support.
Challenging the Comps if the Appraisal Comes In Low
Comp selection issues hit hardest when the appraised value lands below the agreed purchase price, because the lender will only finance up to the appraised value. Stretched comps show up most often in fast-moving markets, where bidding wars push prices above what recent closed sales support, and in rural areas, where the small pool of available sales can drag the value estimate down.
The formal way to push back is a reconsideration of value, or ROV. The Consumer Financial Protection Bureau has confirmed that borrowers can request an ROV based on factual errors or omissions in the report, inadequate comparable properties, or evidence that the appraisal was influenced by prohibited bias.9Consumer Financial Protection Bureau. Mortgage Borrowers Can Challenge Inaccurate Appraisals Through the Reconsideration of Value Process
Fannie Mae, Freddie Mac, and HUD have jointly published borrower-initiated ROV requirements. Lenders must give borrowers a clear disclosure at application and when delivering the appraisal report explaining how to submit an ROV. You can suggest up to five alternative comparable sales for the appraiser to consider, but you only get one ROV request per appraisal.10Fannie Mae. Reconsideration of Value (ROV) For FHA loans, the lender cannot charge you any fees related to the ROV process.11HUD.gov. Appraisal Review and Reconsideration of Value Updates (Mortgagee Letter 2024-07)
The most effective ROV requests point to specific sales the appraiser overlooked, with MLS data showing how those properties are more similar to the subject than the ones used in the report. Vague complaints about the value being too low go nowhere. Focus on concrete evidence: a comp that closed last month two blocks away that the appraiser missed, or a factual error like the wrong square footage or a missing bedroom. The appraiser reviews the new information and decides independently whether it changes the value conclusion. The lender’s underwriter then decides whether to accept the revised report.