What Happens When Public Records Don’t Match the Actual House?
By Jacob Geringer, Certified Residential Appraiser With More Than 26 Years of Experience
One of the more common questions I hear during residential appraisal work is:
“Why does the county say my house is one size, but the appraisal shows something different?”
After more than 26 years of appraising residential real estate, I can tell you that discrepancies between public records and the actual property are not unusual.
County records, tax records, MLS information, old listings, building permits, architectural plans, and homeowner records may all contain different information about the same house.
Sometimes the difference is minor.
Other times, it can involve hundreds of square feet, an addition, a converted garage, a finished basement, an extra bedroom, or another feature that materially changes how the property should be analyzed.
When that happens, an appraiser does not simply choose whichever number is most convenient.
The job is to determine what actually exists, how the space functions, how it should be classified, and how the market responds to it.
Public Records Are Helpful, but They Are Not Always Perfect
Public records can be an important starting point in an appraisal.
They may contain information such as:
Site size
Building size
Year built
Bedroom and bathroom counts
Garage information
Parcel identification
Ownership history
Property classification
Assessed value
Building permits
Prior transfers
But public records were not necessarily created for appraisal purposes.
Depending on the jurisdiction, property data may have been collected for taxation, assessment, permitting, mapping, or administrative purposes.
That means the information may not always describe the property exactly as it exists today.
A record can be useful without being perfect.
Why Can Public Records Be Wrong?
There are many reasons property records may not match the actual house.
The Home May Have Been Changed
A house may have been expanded or modified after the original record was created.
Examples include:
Room additions
Enclosed porches
Finished attic areas
Garage conversions
Basement finishing
Additional bathrooms
Added bedrooms
Detached structures
Decks or patios
Second living areas
If the records were never updated, the public information may still reflect an earlier version of the property.
Older Measurements May Have Been Estimated
Some records may have been based on older sketches, construction information, exterior estimates, or historical assessment practices.
Those measurements may not match a current appraisal measurement.
Data Can Be Entered Incorrectly
Property databases involve large amounts of information.
Occasionally, numbers are entered incorrectly, copied from another source, or never corrected after an error is discovered.
Different Sources May Use Different Definitions
This is one of the biggest reasons homeowners become confused.
The county, MLS, homeowner, builder, and appraiser may not all be measuring or classifying space the same way.
A homeowner may reasonably think:
“If I can use the space, it should count in the square footage.”
But appraisal reporting may distinguish between different types of finished areas.
That distinction can significantly affect the numbers shown in the report.
Gross Living Area Is Not Always the Same as “Finished Space”
One of the most common misunderstandings involves gross living area, often abbreviated as GLA.
A property may contain a substantial amount of finished space, but that does not necessarily mean all of it is included in the same living-area figure.
Depending on the property and applicable appraisal standards, areas may need to be classified separately.
For example:
Above-grade living area
Finished basement area
Finished attic space
Enclosed porch
Converted garage
Detached guest quarters
Finished accessory structure
This does not automatically mean the space has no value.
It means the appraiser may need to analyze it differently.
Why Basements Often Create Confusion
Basements are one of the most common sources of square-footage discrepancies.
Imagine a home with:
2,000 square feet above grade
1,000 square feet of finished basement
A homeowner may understandably describe the property as having 3,000 square feet of finished space.
A public record might also report a combined number.
But an appraisal may report the above-grade living area separately from the finished basement.
That does not mean the basement is ignored.
The appraiser can still analyze the basement’s:
Finish quality
Recreation areas
Bedrooms
Bathrooms
Walkout access
Natural light
Ceiling height
Functional utility
Market appeal
The issue is classification, not whether the finished space matters.
Additions Can Create Larger Discrepancies
Suppose the county records show a home at 1,900 square feet.
During the appraisal, the property measures closer to 2,300 square feet.
That difference deserves investigation.
Perhaps a 400-square-foot addition was constructed years ago.
The appraiser may need to consider questions such as:
Is the addition physically connected to the main house?
Does it have permanent heating and cooling?
Is the construction quality consistent with the rest of the property?
Is access functional?
Does the space appear to be permanently finished?
Is it above grade?
Is the ceiling height appropriate?
How does the market perceive the addition?
Is there permit information available?
The existence of additional finished space does not automatically tell us how it should be treated.
The appraiser still needs to understand what the space actually is.
What About Unpermitted Additions?
This can be more complicated.
A property may contain an addition or improvement that does not appear in public records or permit history.
That does not necessarily tell the entire story.
The appraiser may need to document the improvement as observed and consider how it affects the property’s marketability and utility.
Questions may include:
Is the improvement professionally constructed?
Is it integrated with the home?
Are there obvious safety or functional concerns?
Is the space typical for the market?
Would buyers recognize value in it?
Could the permit status affect marketability?
Is further investigation by the appropriate authority warranted?
An appraiser generally is not acting as a building-code inspector or attorney.
The appraisal role is to observe, analyze, disclose relevant information, and determine whether the issue affects the value assignment.
A Garage Conversion May Not Be Simple Living Area
Garage conversions are another frequent source of disagreement.
Suppose county records show:
1,700 square feet of living area
2-car garage
But the garage has been converted into a family room.
A homeowner may now think the house has around 2,100 square feet.
The appraiser needs to determine how that converted area should be treated.
Important considerations may include:
Heating and cooling
Floor level
Ceiling height
Interior finish
Access
Windows and natural light
Construction quality
Whether parking utility was lost
Whether the conversion is typical in the market
Whether buyers view the conversion positively or negatively
Simply adding the garage square footage to the living-area total may not reflect how the market views the property.
The conversion could add utility while simultaneously eliminating a feature buyers value: garage parking.
That is why appraisal analysis goes beyond arithmetic.
Bedroom Counts Can Also Be Different
Public records may say a home has three bedrooms.
An MLS listing may describe four.
The homeowner may be using five rooms as bedrooms.
Which number is correct?
It depends on the property.
A room being used as a bedroom does not automatically mean every source will classify it the same way.
The appraiser may consider:
Access
Functional layout
Egress
Typical market expectations
Whether the room is above or below grade
Whether it is part of a converted area
How comparable properties are marketed and used
Again, the appraiser’s role is not simply to copy a database field.
The property needs to be analyzed as it actually exists.
Bathroom Counts Can Be Misleading Too
Bathroom discrepancies can occur for similar reasons.
A bathroom may have been:
Added without records being updated
Removed during renovation
Partially completed
Located in a basement
Located in a detached structure
Converted from another use
An appraiser typically verifies the bathrooms observed during the property inspection and then analyzes them in relation to the market.
The public record is evidence.
The physical property is evidence too.
MLS Data Can Also Be Wrong
Public records are not the only source that can contain discrepancies.
MLS information can also differ from the actual house.
A prior listing may have:
Used an incorrect square footage
Included basement space in the total
Relied on owner-provided information
Used builder plans
Repeated a previous listing’s data
Counted an enclosed porch differently
Used an outdated bedroom or bathroom count
An appraiser does not automatically assume an MLS figure is correct simply because it appeared in a prior listing.
When something does not make sense, further research may be necessary.
Why Appraisers Measure the Property
One important reason appraisers may measure a home is to develop an independent understanding of its physical characteristics.
Measurement helps answer questions such as:
How large is the above-grade living area?
How many levels are present?
Is the layout consistent with available records?
Is there an addition?
Does the structure match the public record sketch?
Is an area below grade?
Does a converted space appear to be part of the primary dwelling?
Measurement is not simply about producing a square-footage number.
It helps the appraiser understand the property being valued.
A Difference in Square Footage Does Not Automatically Mean Someone Is Wrong
This is an important distinction.
Suppose:
County records say 2,250 square feet
MLS says 2,400 square feet
Appraisal measurement says 2,325 square feet
It may be tempting to conclude that two of those sources must be “wrong.”
But before reaching that conclusion, you need to understand how each number was developed.
Perhaps one source included an enclosed porch.
Another may have used builder plans.
Another may have rounded dimensions.
Another may be measuring the home under a specific measurement standard.
The numbers cannot be properly compared until you know what each number represents.
The Difference May Matter More in Some Homes Than Others
Not every discrepancy has the same importance.
A difference of 20 or 30 square feet may have little practical significance in a large home.
A difference of 500 square feet may be much more important.
Likewise, the nature of the discrepancy matters.
Finding that a public record missed:
A small closet
is very different from discovering:
A major addition
An entire second floor
A finished lower level
A converted garage
Detached living quarters
The appraiser needs to determine whether the discrepancy affects the property’s classification, comparability, marketability, or value analysis.
More Square Footage Does Not Automatically Equal a Proportional Increase in Value
Suppose an appraisal confirms that the property is larger than the public record indicates.
That does not mean you can simply multiply the additional square footage by a price-per-square-foot figure.
Residential markets generally do not value every additional square foot at the same rate.
The contribution of additional space depends on factors such as:
Overall home size
Layout
Quality
Condition
Location
Market expectations
Functional utility
Type of space
Comparable market evidence
An additional 300 square feet in a small home may have a different market contribution than an additional 300 square feet in a very large home.
The market response needs to be analyzed.
The Appraiser Still Needs Comparable Market Evidence
Once the physical characteristics of the property are understood, the next question becomes:
How does the market respond to those characteristics?
If the home is larger than the public record suggests, the appraiser may need comparable sales that better reflect the actual size.
If the home has an addition, the appraiser may look for properties with similar additions or expanded designs.
If the basement is extensively finished, comparable properties with similar lower-level finish may become more relevant.
If a garage has been converted, the appraiser may need to analyze how buyers respond to homes with reduced garage capacity.
The purpose is not simply to correct a database.
The purpose is to develop a credible opinion of value based on the actual property and relevant market evidence.
Public Record Errors Can Affect Automated Home Values
This is another reason property-data accuracy matters.
Many automated valuation systems rely heavily on databases.
If the underlying data says:
1,600 square feet instead of 2,000
2 bedrooms instead of 3
No finished basement
No addition
No garage
Incorrect lot size
an automated system may be working from an incomplete description of the property.
That does not necessarily mean the automated estimate will always be wrong.
But incorrect input data can limit the reliability of an automated result.
A physical appraisal allows the property to be analyzed based on what is actually present rather than relying exclusively on a database description.
What If the Public Record Shows More Than the House Actually Has?
Discrepancies can go in the other direction too.
Suppose county records show 2,400 square feet, but the property appears to contain only 2,100 square feet of qualifying above-grade living area.
Possible reasons might include:
A previously enclosed area was removed
Part of the home was converted to a garage
A record included space classified differently by the appraiser
Older measurement information was inaccurate
An unfinished area was included
An exterior dimension overstated usable living area
Again, the appraiser needs to determine what exists today.
An appraisal should not simply preserve a larger public-record number because it produces a more favorable result.
What If the Homeowner Has Building Plans?
Building plans can be useful.
So can:
Surveys
Permits
Prior appraisals
Contractor invoices
Renovation documentation
Architectural drawings
Previous listings
Property sketches
These documents can help explain how the property changed over time.
However, plans and records still need to be compared with the property that actually exists.
A plan may show what was intended to be built.
The appraisal deals with what is present and relevant as of the effective date of the assignment.
Prior Appraisals Can Help, but They Are Not Automatically Controlling
A homeowner may say:
“My appraisal five years ago said the house was 2,500 square feet.”
That information may be useful.
But a current appraiser still needs to perform an independent analysis.
A prior report may have:
Used a different measurement method
Included different areas
Contained an error
Reflected a property configuration that later changed
A previous appraisal does not automatically establish the correct figure for every future assignment.
Should Homeowners Correct Public Records?
If a homeowner discovers a meaningful discrepancy, it may be worth contacting the appropriate local authority to understand the process for correcting the record.
That may be particularly important if the discrepancy involves:
Building size
Bedroom count
Bathroom count
Additions
Parcel configuration
Property classification
However, homeowners should also understand that correcting property records can have implications beyond appraisal, including assessment or permitting issues.
The appropriate next step will depend on the situation.
An appraiser can explain what was observed and how it was treated in the appraisal, but questions about taxation, permitting, title, or legal compliance may require the appropriate local authority or professional.
What Should You Do Before an Appraisal?
If you already know the public records are inaccurate, it can be helpful to gather documentation before the appraisal.
Useful items may include:
Building plans
Addition permits
Renovation records
Surveys
Prior property sketches
Contractor documentation
Previous appraisals
Information about when improvements were completed
You do not need to overwhelm the appraiser with every document you have ever received.
But relevant information that explains a material discrepancy can be useful.
Why Experience Matters When the Records Don’t Line Up
Many appraisal assignments are straightforward.
The county says 2,100 square feet.
The house measures close to 2,100 square feet.
The layout makes sense.
The market contains similar properties.
But when the records say one thing and the physical property says another, the assignment becomes more analytical.
After more than 26 years of residential appraisal experience, I have learned that these situations usually require asking several questions:
What does the public record actually represent?
How was the property measured?
Has the house changed?
Is there an addition?
Is the disputed space above grade or below grade?
How is the area finished?
Is it functionally part of the house?
Is there documentation?
How would buyers view the space?
How are similar properties reported?
Does the discrepancy affect comparable selection?
Does it affect marketability or value?
The goal is not to force the property to match the database.
The goal is to understand the property accurately enough to analyze the market evidence correctly.
The Bottom Line
Public records are useful, but they are not infallible.
A house may be larger, smaller, differently configured, or more extensively improved than the public record suggests.
When the records do not match the actual property, an appraiser should not simply copy the database or automatically accept the homeowner’s number.
The discrepancy needs to be investigated.
That may involve measuring the home, reviewing available records, analyzing additions or converted areas, separating above-grade and below-grade space, verifying physical characteristics, and determining how buyers respond to those features.
After more than 26 years of residential appraisal work, one principle remains important:
The appraisal should reflect the property that actually exists, while clearly explaining how that property relates to the available records and market evidence.
Do Your Property Records Seem Wrong?
At 24 Hour Appraisal Group, we provide independent residential appraisal services backed by more than 26 years of appraisal experience.
If your home’s square footage, bedroom count, additions, finished areas, or other characteristics do not match the public record, a professional appraisal can help document the property as it exists and analyze it using relevant market evidence.
We provide appraisal services for estate and probate matters, refinancing, PMI removal, pre-listing planning, tax matters, financial planning, and other residential valuation needs.
Contact 24 Hour Appraisal Group to discuss your property and appraisal needs.
