BOMA 2024 Rentable Area Calculator

See how many additional billable square feet your building gains by adopting the BOMA 2024 measurement standard.

BOMA 2024 (BOMA International's updated measurement standard) expands the definition of rentable area to include qualifying outdoor spaces like balconies, terraces, and covered walkways. Buildings that adopt the standard can unlock additional billable square footage without physical construction.

On BOMA software compliance claims

BOMA does not certify software. Any vendor claiming “BOMA-certified software” is misrepresenting BOMA's position: BOMA publishes a measurement standard, not a software certification program. Compliance means the calculation logic correctly implements BOMA 2024 methodology, specifically that Non-Allocated Tenant Areas are measured at 100% of actual area with no load factor applied. That is what this calculator does.

Your Building Measurements

Load factor is derived automatically from these two values.

Outdoor SF now included under BOMA 2024

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Your Results

Hidden Rentable SF Found

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% Increase in Rentable Area

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New Load Factor

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Enter usable SF, rentable SF, and annual rent per SF above to see your results.

Financial Projections

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Annual Revenue Lift

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Asset Value Lift at 6.5% Cap Rate

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6.5%
3%10%

Frequently Asked Questions

What changed in BOMA 2024?
BOMA 2024 expanded rentable area to include qualifying outdoor tenant spaces — balconies, terraces, rooftop amenity areas, and covered walkways. Previously, only enclosed interior space counted toward rentable area. This change can increase a building’s total rentable SF by 2-8% depending on outdoor amenities.
Does BOMA 2024 apply to existing leases?
It depends on lease language. If a lease references ‘BOMA standards’ without specifying a version, adopting BOMA 2024 may allow re-measurement. If the lease specifies ‘BOMA 2017’ or an earlier standard, re-measurement typically requires a lease amendment or renewal.
How does BOMA 2024 affect load factor?
When outdoor areas are added to rentable SF, the building’s load factor (ratio of rentable to usable area) changes. A higher rentable area with the same usable area means a higher load factor — which means each tenant’s pro-rata share may shift proportionally.
What outdoor spaces qualify under BOMA 2024?
Qualifying spaces include private balconies, shared terraces, rooftop amenity areas, covered walkways, and certain outdoor dining areas. Spaces must be accessible, maintained, and allocated to specific tenants or common areas. Unimproved land, parking surfaces, and loading docks are excluded.

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