Start with your county assessor’s property-record website, but don’t treat that figure as definitive. For the most accurate number, compare the assessor’s “living area” or “building area” with your home’s plans or have a qualified appraiser measure it using a consistent residential measuring standard. County records and real-estate websites can contain outdated or inconsistent measurements.
Check county records
Search online for “[your Wyoming county] assessor property search.” Enter the property address or parcel number, then look for fields such as:
- Living area
- Finished area
- Building area
- Gross living area, or GLA
- Above-grade square feet
Zillow, Redfin, and similar sites may show a number, but they often copy information from assessor or listing records rather than independently measuring the house.
Compare the county figure with your closing documents, previous appraisal, builder’s plans, and inspection report. If the numbers differ, check whether one includes a basement, garage, porch, or unfinished space.
Measure the home yourself
For a practical estimate, sketch each floor and divide irregular sections into rectangles. Measure the length and width of each section in feet, multiply them, and add the results: Length × width = square feet For example, a 20-by-30-foot section equals 600 square feet. Measure exterior dimensions when calculating the home’s overall living area, because interior room measurements exclude wall thickness. Usually, the primary living-area figure includes finished, heated or cooled space above grade. Garages, open porches, unfinished areas, and similar nonliving spaces should be excluded or reported separately. A finished basement should generally be listed separately from above-grade living area, especially if you’re comparing your figure with an appraisal or real-estate listing.
Get an official measurement
If you need the number for selling, refinancing, an estate, insurance documentation, or a dispute over property records, hire a Wyoming appraiser or another professional who regularly measures residential buildings. Ask what standard will be used and whether the report will separate:
- Above-grade finished living area
- Finished basement area
- Garage and storage area
- Porches, decks, and other nonliving space
Keep the measurement report, sketch, and supporting documents. If the assessor’s record is wrong, contact your county assessor’s office and ask what evidence it accepts for correcting the property record.