Net lettable areaNLA

The usable office floor area excluding common areas (lobbies, lifts, toilets, plant), measured per the Property Council of Australia's method of measurement.

Formula

NLA = GFA − common areas − plant − cores

WherePer PCA Method of Measurement for office buildings.

Why it matters

NLA is what office tenants pay rent on, and what office feasibilities calculate rent rolls against. The ratio NLA / GFA is the efficiency of an office building; 80–85% is good, below 75% is poor.

Worked example

An office tower with 24,000 m² GFA and 19,800 m² NLA has an efficiency of 82.5%. At $620/m² of NLA, the gross rent roll is 19,800 × $620 = $12,276,000.

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