A two-storey foyer is open from the entry to the roof. How is the open area above treated in GLA?
Correct Answer
C) Excluded from the second-floor area — there is no floor there
Why this is correct: GLA is based on floor area. In a two-story foyer, the open void on the second floor has no walkable floor surface, so that area is excluded from the second-floor GLA calculation. Why the other choices are wrong: 'Counted on both floors, since the heated volume fills the space' is wrong; volume does not equal floor area. 'Counted at the second floor only' is wrong because the first-floor area under the void counts, but the second-floor void does not. 'Split between the floors by ceiling height' is wrong; there is no standard split convention for voids. Exam tip: GLA counts what you can walk on. Sketch software automatically deducts openings.
Why This Is the Correct Answer
The void is excluded from second-floor area because there is no floor there to measure. That follows directly from the definition of gross living area as finished floor area rather than enclosed volume. The first-floor area beneath the void still counts in full, since a floor exists at that level. Any value the two-story feature contributes belongs in a quality or appeal adjustment, not in the area figure.
Why the Other Options Are Wrong
Option A: Counted on both floors, since the heated volume fills the space
Counting the same space on both floors would double count a single volume and inflate the reported area, which then propagates into every price-per-square-foot comparison and every size adjustment. Heated volume is not the measurement standard; finished floor area is. This is the most consequential error of the four because it systematically overstates the subject.
Option B: Counted at the second floor only
Counting the void at the second floor and not the first inverts the physical reality, since the floor that exists is the lower one. It would understate first-floor area while overstating second-floor area, producing the right total by accident in some cases but the wrong distribution. Room counts and level descriptions would also be wrong.
Option D: Split between the floors by ceiling height
No measurement standard splits a void between levels by ceiling height or any other proportion, and inventing a convention would make the appraiser's area figure non-reproducible. Measurement standards exist precisely so that two appraisers measuring the same house arrive at the same number. An unpublished split rule defeats that purpose.
If You Cannot Stand On It
Gross living area counts surfaces you could stand on. A two-story foyer, an open stairwell, and a vaulted ceiling all remove floor at the upper level. No floor, no area, however impressive the volume.
How to use: When a stem describes an open, vaulted, or two-story space, deduct the void from the upper level and keep the lower level intact. Then ask separately whether the market pays a premium for the feature.
Exam Tip
Below-grade finished area is the companion rule. Even a fully finished walkout basement is reported separately rather than folded into gross living area.
Common Mistakes to Avoid
- -Counting open volume as floor area on the upper level
- -Adding finished basement area into gross living area
- -Capturing an architectural feature by inflating square footage rather than through an appeal adjustment
Concept Deep Dive
Analysis
Gross living area is a measure of finished, above-grade floor area, and the operative word is floor. Standard measurement practice computes it from exterior dimensions of the finished above-grade portions of the dwelling and counts only areas where a floor actually exists and is finished, heated, and accessible directly from other living space. A two-story foyer creates a void: the first floor has a floor there and the second floor does not, so the first-floor area counts in full and the corresponding second-floor footprint is deducted from the second-floor measurement. The heated volume rising through the space is architecturally impressive and may well add value, but volume is not area and the two must not be conflated. The correct handling is to exclude the void from area and, if the market pays a premium for the dramatic entry, to capture that through a quality or appeal adjustment supported by paired sales rather than by inflating the square footage. Open stairwells and vaulted great rooms present the identical issue.
Background Knowledge
You need the definition of gross living area as finished, above-grade floor area measured from exterior dimensions, and the rule that below-grade finished area is reported separately rather than added to GLA. You should also know that measurement standards govern how area is computed and that quality and appeal features are handled through adjustments rather than through area.
Real-World Application
An appraiser sketching a colonial with a dramatic two-story entry deducts the open area from the second-floor measurement, reports the resulting gross living area, and supports a separate positive appeal adjustment with paired sales showing buyers pay a premium for the feature.
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