Encyclopedia
Usable area
The space a tenant actually uses, before adding a share of common areas.
For example: A tenant compares usable area across listings. (Illustration only, not a real deal.)
This is a general industry term with no single official definition. Your lease or contract wording controls.
Example only, not a real client. Say you run a design studio and need room for 15 desks, a meeting room and storage. You plan around usable area, and a quick test fit from a designer shows one suite that looked big enough on paper would only fit 12 desks. You choose the other suite and avoid a costly mistake.
What I’d tell a friend
Plan your layout around usable area, and get a test fit before you sign. The rentable number on a listing does not tell you how many people fit.
Why it matters to you
It's the space you can actually use. The gap between usable and rentable area is how much common space you're paying for, so compare both when choosing a space.
How to use it in your deal
Tenants should ask for usable and rentable area, the load factor and the measurement standard, and compare spaces on usable area and total cost per usable foot. Visit and measure roughly yourself; columns, odd shapes and window lines can make usable space less efficient than the number suggests. Ask for floor plans and confirm what's included, like interior storage rooms.
Landlords should provide clear measurement certificates using a recognized standard. Buyers should check that leases and rent rolls use consistent areas. Owners renovating can sometimes improve efficiency by reworking corridors. For industrial and retail, rentable and usable are often closer, but mezzanines, shared loading and outdoor areas still raise questions.
Walk the space with a tape measure before you sign, and compare it with the plan. Walk the space with a tape measure if the numbers look generous.
Mistakes I see
Comparing rentable rents without checking usable area. Ignoring layout efficiency. Not asking for drawings.
In BC and Vancouver
Leases usually reference a Building Owners and Managers Association (BOMA) standard; no BC statute sets measurement rules.
Official sources: CanLII (court decisions)
What usable area is
Usable area is the space inside your suite that you actually occupy, such as offices, open work areas and your own storage. It does not include shared areas like lobbies, corridors and shared washrooms.
Rent is usually charged on rentable area, which is larger, so the gap between the two is part of what you pay for.
Using it to compare spaces
Compare spaces on total cost per usable square foot, including additional rent. That puts suites with different load factors on the same footing.
Columns, odd shapes and window lines affect how efficient a space is, so two suites with the same usable area may not fit the same layout. A test fit shows the difference.
Questions to ask before you sign
- What's the usable area?
- What's the load factor?
- Is the layout efficient?
- Which standard applies?
- Can I see drawings?
Keep reading
Related terms: Rentable area
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General information for British Columbia only. It isn’t legal, tax, accounting or financial advice, laws and rates change, and reading it doesn’t make you my client. Any numbers or scenarios are hypothetical. Check the linked official source and talk to a lawyer, accountant or other qualified professional before you act or sign anything. See the terms and disclaimer.