Office Area Measurement Standards in Australia

Office space in Australia is measured to a consistent national standard, not an ad hoc, building-by-building basis. Here's how it works, and why it matters if you own, lease, or manage office space.

The National Standard: PCA Method of Measurement

Office tenancies across every Australian state are measured for leasing purposes according to the Property Council of Australia's Method of Measurement, specifically the Net Lettable Area (NLA) methodology. This is what allows a tenant comparing office space in Melbourne, Sydney or Brisbane to actually compare like-for-like figures, rather than each building using its own informal measurement approach.

What the Standard Covers for Office Space

• Measurement to the internal finished surface of enclosing walls
• Exclusion of lift shafts, shared toilets, tea rooms and common corridors
• Exclusion of structural columns and piers
• Exclusion of areas dedicated to building plant and services

Why a National Standard Exists for Office Space Specifically

Office leasing is one of the most heavily benchmarked segments of commercial property, rent per square metre, incentives, and effective rates are all compared across buildings and markets constantly by tenants, agents and analysts. That comparison is only meaningful if every building is measuring NLA the same way, which is exactly the problem the PCA methodology solves.

Base Building vs. Fitted-Out Measurement

One nuance worth knowing: NLA is generally measured against the base building's structure, not the tenant's specific fitout. A tenant adding internal partitions for meeting rooms doesn't change the underlying NLA figure, since the measurement boundary is the enclosing walls of the tenancy, not the internal fitout within it.

What This Means Practically

For landlords, an accurate, methodology-correct NLA figure protects the integrity of rent and outgoings calculations across the whole building. For tenants, it's the figure that determines what you're actually paying per square metre, worth confirming independently rather than taking on faith. For agents, a defensible, correctly-calculated NLA figure is part of presenting a tenancy credibly to the market.

How Arya Designs Can Help

We measure office tenancies and calculate NLA to the Property Council of Australia's Method of Measurement, delivered as a floor plan and area schedule. See our Net Lettable Area (NLA) Measurement service.

Ready to Get Started?

Send us the building address and scope, and we'll provide a fixed quote for an accurate NLA measurement.