The total enclosed area of a floor or building measured to the outside surface of the permanent exterior walls of the building or structure or to a predetermined surface, or plane as in the case of overhangs and projections to the outside surface of the building. Gross Construction Area may include areas above, below, or outside boundaries of the building. This area may include other structures separated from the main building that are used by the main building such as the buildings central plant, parking structures, etc. This area may include areas such as penthouse mechanical rooms, basement services, exterior corridors, tunnels, balconies, overhangs, etc. Gross Construction Area is not to be used as Rentable Area except where an entire building is lease by a single occupant.
It includes the area defined as BOMA's "exterior gross area" as well as other areas that have a structural floor, or are covered by a roof or canopy, that are typically unenclosed but within the building perimeter. It may be an appropriate measure of area upon which to base an estimated construction cost or for valuation using the replacement value approach of appraisal. Accurate construction cost estimating and replacement cost valuation should consider fully enclosed and finished space differently than unenclosed space, applying unit costs appropriate to various types of space.
The total of all the horizontal floor areas (as viewed on a floor plan) of all floors of a building contained within their building perimeters excluding voids (except for occupant voids), interstitial space, roofs, unexcavated areas, crawl spaces, un-structured on-grade parking and other site improvements. Make no deductions for columns or any structural elements within the building perimeter.
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