The clearest red flags are round-number adjustments applied uniformly across comparables, no stated derivation method anywhere in the report, directionally inconsistent adjustments for the same characteristic, large gross adjustments without reliability discussion, adjustments that all push toward one conclusion, and an adjustment grid that contradicts the report’s own narrative.
Each is detectable from the four corners of the report before any workfile is produced. Lloyd Real Estate Services identifies and documents these defects through our Property Value Dispute Expert Services, delivering formal appraisal reviews and testimony-ready critiques.
Table of Contents
- Why Adjustments Are the Center of Gravity in Valuation Disputes
- Red Flag 1: Round Numbers and Suspiciously Uniform Percentages
- Red Flag 2: No Stated Derivation Anywhere in the Report
- Red Flag 3: Directional Inconsistency Across the Grid
- Red Flag 4: Large Gross Adjustments With No Reliability Discussion
- Red Flag 5: One-Directional Bias
- Red Flag 6: Narrative That Contradicts the Grid
- Red Flag 7: Cost Substituted for Contributory Value
- Red Flag 8: Missing Adjustments for Known Differences
- Red Flag 9: Time and Location Adjustments Without an Index
- Red Flag 10: Reconciliation That Explains Nothing
- Testing the Grid: A Reviewer’s Arithmetic Checklist
- What the Workfile Should Reveal
- How Lloyd Real Estate Services Builds a Rebuttal
- Key Takeaways
- Frequently Asked Questions
Why Adjustments Are the Center of Gravity in Valuation Disputes
In most contested valuations, the parties agree on far more than they dispute. The comparable sales are often drawn from overlapping pools. The property’s physical characteristics are usually undisputed.
The effective date is typically fixed by law or by the facts.What separates two experts by 20, 40, or 100 percent is almost always the adjustments — the quantified judgments about how much each difference between the subject and each comparable is worth.
This makes adjustments the highest-yield target in appraisal review. They are where professional judgment is most concentrated, where support is most often absent, and where a defect propagates mathematically through every indicated value in the grid.
Our Property Value Dispute Expert Services at Lloyd Real Estate Services treat the adjustment grid as the first and most productive object of analysis in any opposing report.
Red Flag 1: Round Numbers and Suspiciously Uniform Percentages
Markets do not produce round numbers. Market-derived adjustments extracted from paired sales or regression analysis land on figures like 7.3 percent, $11.40 per square foot, or $3,850 per bathroom.Watch for:
- Every adjustment expressed in multiples of 5 or 10 percent
- A single per-square-foot figure applied identically across comparables of materially different age, quality, and price point
- $5,000 for a garage bay, $10,000 for a pool, $25,000 for a view — identical values across properties at different price levels
- Percentage adjustments applied to dollar figures without disclosure of the base they were applied to
Round numbers are not automatically wrong. A reviewer’s question is narrower and more effective: where did this number come from? If the report cannot answer, the number is a conclusion masquerading as data.A related tell is scale insensitivity.
A $20,000 condition adjustment on a $250,000 comparable and the same $20,000 on a $1.4 million comparable implies the market values condition identically in both segments. That is rarely true and never self-evident.
Red Flag 2: No Stated Derivation Anywhere in the Report
This is the single most common defect. The report presents a complete adjustment grid with no explanation — anywhere in the narrative, addenda, or exhibits — of how any adjustment was derived.Credible reports identify the method for each significant adjustment:
| Derivation Method | What the Report Should Show |
|---|---|
| Paired sales analysis | The specific sales paired, the isolated variable, the resulting differential |
| Repeat / resale analysis | Same property, two dates, the computed rate of change |
| Regression or statistical analysis | Sample size, variables, coefficients, model limitations |
| Grouped or sensitivity analysis | The dataset sorted by variable, observed directional effect |
| Income capitalization of rent differential | Rent delta, capitalization rate applied, resulting value |
| Depreciated cost as a proxy | Cost source, depreciation applied, acknowledgment that cost ≠ value |
| Market participant interviews | Names, dates, roles, substance of statements |
| Published survey data | Source, publication date, applicability to the subject market |
Generic language is not derivation. Phrases such as “adjustments were based on the appraiser’s experience in the market,” “adjustments reflect market reaction,” or “adjustments were derived from an analysis of market data” state a conclusion about methodology without disclosing any methodology.Under professional standards, an appraisal report must contain sufficient information to enable intended users to understand the report.
A grid with no derivation disclosure typically fails that test on its face — a point Lloyd Real Estate Services’ Property Value Dispute Expert Services document explicitly in formal review assignments.
Red Flag 3: Directional Inconsistency Across the Grid
Internal inconsistency is powerful because it requires no competing data to demonstrate. The report refutes itself.Look for:
- Opposite signs for the same relationship. Comparable 1 is 400 square feet larger and receives a downward adjustment; Comparable 3 is 350 square feet larger and receives an upward adjustment or none at all.
- Variable rates for identical characteristics. Age adjusted at $1,200 per year for one comparable and $400 per year for another, with no explanation.
- Inconsistent treatment of the same feature. A finished basement adjusted at $18,000 in one column and ignored in another where the same difference exists.
- Contradictory location logic. One comparable adjusted upward for an inferior location while another in the same submarket receives a downward adjustment for superior location — with no data distinguishing them.
- Inconsistency across the appraiser’s own reports. Where the same appraiser has valued nearby properties, adjustment rates that shift between reports without market explanation are highly impeachable.
Build a matrix: characteristic down the rows, comparable across the columns, implied rate in each cell. Inconsistencies surface immediately and present well as a demonstrative exhibit.
Red Flag 4: Large Gross Adjustments With No Reliability Discussion
Net adjustment is the sum of positives and negatives. Gross adjustment is the sum of absolute values. A comparable adjusted +30 percent and −28 percent shows a net of +2 percent and a gross of 58 percent — superficially clean, substantively unreliable.Red flags include:
- Gross adjustments exceeding 25 to 30 percent with no commentary on reliability
- Comparables requiring heavy adjustment weighted equally with lightly adjusted sales
- Net adjustments near zero concealing large offsetting adjustments
- No disclosure of gross figures at all, requiring the reviewer to compute them
There is no universal bright-line threshold in professional standards. The defensible position is that as gross adjustment rises, the comparable’s reliability declines, and a credible report acknowledges and addresses this in reconciliation. Silence on a 60 percent gross adjustment is a reasoning failure, not a formatting one.
Red Flag 5: One-Directional Bias
Legitimate adjustment grids contain a mix of positives and negatives, because comparables differ from the subject in both directions. A pattern worth testing:
- Nearly all adjustments push indicated values in the same direction
- Comparables that would indicate an unfavorable value are rejected while similar sales favoring the client’s position are retained
- Superior features of the subject are adjusted generously; inferior features are adjusted lightly or omitted
- The final conclusion sits at or beyond the edge of the adjusted range rather than within it
- The pre-adjustment range and post-adjustment range barely overlap, indicating adjustments moved the entire dataset
Compute the unadjusted range of the comparables and compare it to the adjusted range. If adjustments narrowed a wide spread to converge tightly on a conclusion, the grid may have been built backward from a target. If adjustments shifted the entire range in one direction, that pattern is worth a direct question in deposition.
Red Flag 6: Narrative That Contradicts the Grid
Reports are frequently assembled in sections, and the sections do not always agree.Check for:
- The market analysis describes a declining market; the grid applies upward time adjustments
- The neighborhood section calls the subject’s location superior; the grid adjusts comparables upward for location
- The highest and best use conclusion identifies one use; the comparables reflect a different use
- The improvements description notes deferred maintenance; no condition adjustment appears
- Photographs show conditions the grid ignores entirely
- Stated effective date differs between transmittal letter, grid, and certification
These contradictions are devastating in testimony because they are binary. The expert must concede one section is wrong, and the concession damages the report’s overall reliability.
Red Flag 7: Cost Substituted for Contributory Value
Cost and contributory value diverge, often substantially. A $90,000 in-ground pool may contribute $25,000 in one market and nothing in another. A $60,000 kitchen renovation may contribute $35,000.Red flags:
- Adjustments matching construction cost or recent renovation expenditure precisely
- Improvements adjusted at full replacement cost with no depreciation
- Specialized or over-improved features adjusted at cost, ignoring functional obsemblescence
- Solar, outbuildings, or custom features adjusted at installed cost without market support
Cost is acceptable as a starting point when market extraction is unavailable, provided the report discloses the method, applies depreciation, and acknowledges that cost is not value. Undisclosed cost-based adjustments presented as market-derived are a different matter.
Red Flag 8: Missing Adjustments for Known Differences
Omission is as significant as overstatement, and easier to overlook.
- A differing property interest — leased fee versus fee simple — with no adjustment
- Seller concessions, buy-downs, or seller financing disclosed in the sales data but not adjusted
- Non-realty components such as furniture, equipment, or inventory included in a comparable’s price
- Atypical motivation — foreclosure, REO, estate, or intra-family transfer — used without adjustment or comment
- Material zoning, utility, or access differences left unaddressed
- Significant site size variation ignored because the appraiser “found no reliable data”
That final justification cuts both ways. If no reliable data exists for a material difference, the reliability of the entire comparison is reduced — and the report should say so.
Our Property Value Dispute Expert Services document omissions alongside overstatements, because the two together often explain the full gap between competing opinions.
Red Flag 9: Time and Location Adjustments Without an Index
These two adjustments are frequently the largest in magnitude and the least supported.For market conditions (time) adjustments, a credible report cites a specific index — repeat-sales data, median or mean price trends for the relevant property class and submarket, resale pairs, days-on-market and absorption trends, or list-to-sale ratio movement.
Red flags: a flat annual percentage applied to all comparables regardless of their sale dates; a rate inconsistent with the report’s own market analysis; adjustment applied from contract date for some sales and closing date for others.
For location adjustments, support should come from price-level differentials between submarkets for similar property types, paired sales across a boundary, or documented market participant statements. Red flags: location adjusted in round percentages with no submarket data; adjustments that conflate location with condition or quality; no map or submarket delineation permitting verification.
Red Flag 10: Reconciliation That Explains Nothing
Reconciliation is where the appraiser explains weighting. Deficient reconciliation reads as:
“All comparables were considered. Comparable 2 was given most weight due to its similarity to the subject. The final value conclusion is $X.”
This states a result without reasoning. Specific red flags: a conclusion outside the adjusted range; a conclusion at a suspiciously round figure when adjusted indicators are irregular; no discussion of why heavily adjusted comparables received weight; approaches “considered but not developed” with no stated reason; a conclusion matching a listing price, loan amount, assessed value, or settlement demand.
Testing the Grid: A Reviewer’s Arithmetic Checklist
Mechanical checks that frequently produce findings:
- Recompute every column. Arithmetic errors in adjustment grids are more common than expected.
- Verify per-unit rates. Divide each adjustment by the quantified difference to derive the implied rate, then compare across columns.
- Compute net and gross for every comparable, as both dollars and percentages.
- Compare unadjusted and adjusted ranges. Note direction and compression.
- Check the conclusion against the adjusted range. Inside, at the edge, or outside?
- Verify sale data independently — recorded price, date, terms, concessions, non-realty components, arm’s-length status.
- Confirm physical data against public records, permits, and photographs.
- Test consistency against the appraiser’s other reports in the same market, if available.
- Reconcile stated dates across transmittal, grid, certification, and inspection.
- Identify rejected sales that would have indicated a different value.
Lloyd Real Estate Services performs each of these steps as standard procedure in appraisal review engagements under our Property Value Dispute Expert Services, producing findings in a format suitable for exhibits and deposition outlines.
What the Workfile Should Reveal
Report-level red flags justify a workfile request. The workfile should contain the paired sales and calculations behind each adjustment, the full set of sales considered and rejected with reasons, interview notes with names and dates, regression outputs or survey data relied upon, dated photographs, and prior drafts.Two findings are especially consequential:
Adjustments with no supporting documents. If the derivation does not exist in the workfile, it likely did not exist when the report was written.
Draft-to-final changes without documented reasons. Adjustment rates that shifted between drafts in a direction favoring the client, absent any new data in the file, raise questions about independence rather than methodology.
How Lloyd Real Estate Services Builds a Rebuttal
Our Property Value Dispute Expert Services follow a defined sequence:
- Four-corners review of the opposing report, before any workfile is produced
- Grid reconstruction and arithmetic verification, with implied per-unit rates computed for every adjustment
- Consistency matrix mapping each characteristic across comparables to isolate internal contradictions
- Independent data verification of every comparable’s price, date, terms, and physical characteristics
- Formal appraisal review under the applicable professional review standards, stating whether the opinion is credible and why
- Targeted workfile request, directed at the specific adjustments lacking disclosed support
- Independent valuation where the matter requires an affirmative opinion rather than a critique alone
- Demonstrative exhibits translating adjustment defects into visuals a judge or jury can follow
- Deposition and cross-examination support, including question outlines tied to specific report pages
A rebuttal built on documented internal inconsistency and absent derivation is stronger than one built on a competing opinion alone — because it does not require the trier of fact to choose between two experts. It requires only that they read the opposing report carefully.
Key Takeaways
- Adjustments drive most valuation disputes. They concentrate judgment, are rarely well-supported, and propagate through every indicated value.
- Round and uniform numbers signal judgment, not market extraction. The operative question is always derivation.
- Absent derivation is the most common and most actionable defect. “Based on the appraiser’s experience” discloses nothing.
- Internal inconsistency is self-proving. Directional contradictions across a grid require no competing data to establish.
- Compute gross adjustments. Net figures near zero routinely conceal large offsetting adjustments and low reliability.
- Test for one-directional bias by comparing the unadjusted range to the adjusted range and locating the conclusion within it.
- Check the narrative against the grid. Market analysis, neighborhood description, photographs, and highest and best use frequently contradict the adjustments.
- Omitted adjustments matter as much as overstated ones — property interest, concessions, non-realty components, and atypical motivation are commonly skipped.
- Time and location adjustments demand an index. They are usually the largest and least supported.
- Request the workfile. Derivation that does not exist in the file probably never existed.
Frequently Asked Questions
Is there a maximum acceptable adjustment percentage? No. Professional standards impose no numerical cap. Some lending guidelines reference net and gross thresholds, but the governing principle is that larger adjustments reduce a comparable’s reliability, and the report must address that reduction rather than ignore it.
Can an opposing appraisal be challenged on adjustments alone? Yes. Unsupported or internally inconsistent adjustments can undermine credibility independently of whether the final number is defensible. A formal appraisal review can conclude an opinion is not credible based on development and reporting deficiencies.
What does a formal appraisal review involve? A reviewer forms an opinion about the quality of another appraiser’s work — the completeness, adequacy, relevance, and reasonableness of the analysis — and states whether the opinion of value is credible, with supporting reasons. It is a distinct assignment with its own scope and disclosure requirements.
How do I obtain the opposing appraiser’s workfile? Through discovery, subject to jurisdictional rules on expert disclosure. A targeted request citing specific adjustments and required documentation is generally more effective than a broad demand, and a reviewer’s findings help define the request precisely.
Does an unsupported adjustment make the whole appraisal inadmissible? Not necessarily. Courts more often admit the testimony and discount its weight. However, where unsupported adjustments indicate the opinion is not a reliable application of accepted methodology to the facts, exclusion motions are available under the applicable evidentiary standard.
When should an appraisal reviewer be engaged? As soon as the opposing report is received, and ideally before deposition. Early review shapes the workfile request, the deposition outline, and any exclusion motion — all of which are far more effective when informed by a documented technical critique.