Comparing commercial floor areas: what does the number include?

1. Start with the purpose of the measurement

A quoted area may be used to describe a listing, calculate a lease charge or plan an operation. Establish what question you are trying to answer before comparing two numbers. The area used in one context may not describe the space your business can actually use.

Ask for the source, date and basis of each figure. Keep an approximate listing figure separate from a measurement prepared for a defined purpose.

2. Ask what is included

Request an explanation of the boundaries and components included in the stated area. Where relevant, ask how offices, mezzanines, storage, shared facilities and other areas are treated. Do not assume two listings use the same method because both quote square feet.

For a lease, have the relevant wording reviewed so you understand how the area relates to the proposed charges. This guide does not prescribe a measurement standard or determine the legal effect of a lease definition.

BOMA BC’s overview of measurement standards distinguishes office, industrial, retail and gross-area methods. Its office overview describes rentable-area calculations, while the retail overview focuses on gross leasable area. That is a reason to ask which method and edition produced a figure, rather than assume a single rule applies to every property.

Ask the person supplying the area to identify any shared-area allocation separately. A space-planning drawing and a figure used to calculate rent answer different questions. Request the underlying measurement report where available, and ask a qualified measurement professional to explain the basis. A reference to “BOMA” without an edition, report or explanation leaves important questions open.

3. Compare practical utility separately

Prepare a simple schedule of the functions the operation needs and the space available for each. Circulation, access and layout can matter as much as a total. Obtain appropriate measurement or design advice when accuracy is material to the decision.

Illustrative example: two industrial units advertise similar total areas, but one devotes more space to offices. An occupier seeking warehouse capacity should compare the layout and usable areas before treating the units as equivalent.

Walk through a proposed layout with the people who will use it. In an industrial unit, mark the route from the loading door to storage and work areas. In a retail unit, separate customer-facing space from stockrooms and other support areas. In an office, test meeting rooms, circulation and workstations. These are operational comparisons, not substitutes for a measured area report or confirmation that the intended use is permitted.

4. Use a consistent comparison sheet

For each shortlisted property, record: quoted total; source and date; measurement basis; included components; required verification; annual base-rent total and other charges, where relevant; and the operating layout you are evaluating. Mark unknown entries instead of filling them with assumptions.

When comparing a price or rent per square foot, check the denominator and the charges included. A neat calculation does not make incompatible inputs comparable. Ask the relevant professionals to reconcile material differences before relying on the result.

Illustrative calculation—not a market quote: suppose a hypothetical base-rent rate is $25 per square foot per year. Applied to 2,000 square feet, it produces $50,000 in annual base rent; applied to 2,200 square feet, it produces $55,000. Additional rent, taxes and other costs are excluded. The point is not that one area is wrong, but that the rate alone does not tell you the total commitment.

For each option, ask for the annual base-rent total as well as the rate, then identify other charges separately. If one quotation is monthly and another annual, put them on the same time basis before comparing. For a purchase, compare the total price alongside the area basis, condition, rights and operating suitability; price per square foot is only one input.

5. Resolve discrepancies before commitment

If a plan, listing and document show different figures, request clarification and identify which figure is being used for which purpose. Have your advisers address material uncertainties in the transaction process rather than assuming they can be sorted out after completion.

Retain the verified information and its limitations for future planning. Clear measurement records can help with layouts, leasing discussions and a later sale without promising that every future party will use the same basis.

For owners: make the area easy to understand

Before marketing, collect the available plans and measurement records, identify when they were prepared and note changes to the layout since then. Ask the appropriate professional whether updated measurement is warranted. Keep the source and limitations attached to the figure when preparing marketing materials.

If two documents disagree, do not simply choose the larger number. Explain the difference, obtain advice and correct the material information before relying on it. Clear records give prospective buyers and tenants a better basis for their own investigation; they do not replace that investigation.

Your next step: choose one shortlisted property and write down its quoted area, source, measurement basis, included components and unanswered questions. Resolve the important gaps before using it as the benchmark for every other option.

General information for commercial property decisions in Metro Vancouver and the Fraser Valley. Confirm property-specific requirements with the appropriate legal, financial and technical advisers.