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Office Space Efficiency Calculator
Office space efficiency benchmarks how much rentable square footage each employee occupies. Combined with the building's load factor (the gap between rentable and usable SF), it tells corporate real estate teams whether their footprint is competitive — and tells landlords how attractive their building is to high-density tenants.
Excludes restrooms, mechanical, lobby
RSF / employee
171
USF / employee
150
Load factor %
14.29%
Annual rent / employee
$5,486
How the math works
Office space efficiency = SF per employee. Industry benchmarks: traditional office 200-250 RSF/seat; modern open-plan 150-180 RSF/seat; hot-desk hybrid 80-120 RSF/seat. The load factor (RSF − USF as % of USF) reflects building common-area share — typical 12-18%.
Tenants paying rent on RSF but using only USF subsidize building common areas. High-load-factor buildings make tenants pay more for less actual workspace.
How to Use
- Enter rentable SF (the leased number on the lease).
- Enter usable SF (excludes restrooms, mechanical, building lobby).
- Enter headcount and annual rent per RSF.
- Read RSF/USF per employee, load factor, and annual rent per employee.
Frequently Asked Questions
Healthy load factor range?
12-18% is typical for modern multi-tenant office. Above 20% suggests excessive common areas or inefficient floor plate. Single-tenant full-floor leases often run 0%.
RSF per employee benchmarks?
Traditional 200-250 RSF; open-plan 150-180; hybrid 80-120. Tech companies have pushed toward 100-150 with hot-desking.
Why does load factor matter to tenants?
Tenants pay rent on RSF but use only USF. A 20% load factor means 20% of rent buys building common space — sometimes worth it (lobby, fitness, café), sometimes not.
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