Does a Loft Count as GLA?

It depends. A loft can count as GLA (gross living area) if it is above-grade, finished, and meets the ceiling height requirements under ANSI Z765-2021. Whether it qualifies often comes down to how much usable headroom it has — not just whether it exists.

The short answer

Yes — a loft counts as GLA if it is:

Above-grade: no portion of the loft floor is below the surrounding exterior grade
Finished: has walls, floors, and ceiling completed to a habitable standard
Meets ceiling height: at least 7 feet of ceiling height over a minimum of 50% of the floor area (ANSI Z765-2021)

If the loft is a finished, open upper level in a two-story great room — the kind with a railing overlooking the living area below — it almost always qualifies as GLA. If it is more of a storage area with low sloped ceilings, it likely does not.

Ceiling height is the make-or-break factor

Under ANSI Z765, the ceiling height rule applies to any finished space with a sloped or irregular ceiling — which includes most lofts. The standard requires:

At least 7 feet of ceiling height
Over at least 50% of the finished floor area
Any area with a ceiling below 5 feet is excluded entirely from the GLA count

In practice: a loft above a garage or over a master bedroom — with a standard 8-foot ceiling — clearly qualifies. A sleeping loft above a cabin living area where half the space has a 4-foot ceiling does not.

Open-to-below lofts

A loft that is "open to below" (where part of the floor is open and you can look down to the level beneath) is still measured as its own floor plan level. Only the actual floor area of the loft is counted — not the open void.

When measuring in PlanSnapper, upload the loft floor plan level separately and trace only the area that has actual floor (not the open void). Set your scale using a known dimension and PlanSnapper will calculate the GLA-eligible area for that level.

What if the loft is unfinished?

Unfinished lofts — exposed framing, no floor covering, no drywall — do not count as GLA regardless of ceiling height. GLA requires finished space. An unfinished attic-style loft is not GLA, even if it is above grade and technically accessible.

How PlanSnapper handles lofts

PlanSnapper does not automatically classify any space as GLA or non-GLA — that determination is yours as the appraiser or measurer. The tool measures the perimeter you define.

To measure a loft correctly:

Upload the loft level floor plan as a separate image
Trace the perimeter of the finished floor area only — exclude the open void if the loft is open to below
Exclude any area where the ceiling is below 5 feet
Set your scale using a known wall dimension
PlanSnapper will return the square footage of the area you traced, which you then include in or exclude from GLA based on your assessment

Loft vs. bonus room vs. finished attic

These terms get used interchangeably, but they matter for GLA purposes:

Loft: open upper-level space, usually visible from below. Counts as GLA if finished and meets ceiling height.
Bonus room: finished room above the garage or over a first-floor extension. Counts as GLA if above-grade, finished, and ceiling height qualifies.
Finished attic: enclosed upper-level space with knee walls. Often only partially qualifies due to sloped ceiling reducing the 7-foot area. Count only the portion meeting the ceiling height threshold.
Loft square footage appraisal guide
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