By Joseph T. Ellington Jr. – Licensed Residential Appraiser, Capital Valuations.
Why two square-footage figures can disagree
An MLS entry, tax assessment, builder plan, and appraisal can report different living-area figures. The difference might be a simple transposition, a dated record, a different definition, or a field-measurement error. Investigate the method and underlying dimensions before declaring one figure correct. If you need new documentation for your property, request a professional home measurement and share the conflicting records. This article is a troubleshooting checklist; our measurement workflow explains how to calculate area. If the discrepancy also involves room use, our Virginia bedroom classification guide explains why a room label alone does not settle its treatment.
Eight errors to investigate
| Potential error | How to check it |
|---|---|
| Wrong unit or transcription | Compare raw dimensions and calculated totals with the report |
| Incorrect laser reference | Confirm front/back reference point and repeat the run |
| Tape slack or angled measurement | Repeat level and straight between identified endpoints |
| Open or overlapping sketch polygons | Reconcile level outlines and subtract excluded areas |
| Different finished-area definition | Separate above-grade, below-grade, unfinished and accessory areas |
| Old permit or assessor record | Compare addition dates, plans and actual property |
| Sloped ceiling or limited-height space | Record heights and apply the relevant standard |
| Assumed site boundary | Use a survey for a boundary issue; a house sketch is not a survey |
Do not confuse the house outline with the parcel
A tax map, GIS boundary or measuring wheel may help understand a site, but it does not establish the legal boundary or the dwelling’s finished area. If a fence, easement, or lot line is disputed, consult a licensed surveyor and the recorded documents. The appraiser can identify information relevant to valuation within the assignment scope.
Reconcile the report
- List each source’s area figure, date and stated basis.
- Recalculate from the field sketch by level, retaining precision until final reporting.
- Check the applicable Fannie Mae area guidance and our ANSI explanation when the assignment uses that standard.
- Identify any inaccessible area or permitted exception and explain it.
- If the corrected area changes comparable analysis, reconsider the valuation rather than only changing a label.
A homeowner can supply a plan or permit but should not demand a particular figure. If the discrepancy is in the assessor’s record and you are questioning the assessment, our property tax appeal guide explains how to organize evidence and contact the right local office. For a lender appraisal, route a factual correction through the lender’s review process. For a private assignment in Hampton Roads, contact Capital Valuations with the property address and underlying documents.
