03 — Tools / ROI Calculator
Mezzanine ROI calculator
One-time mezzanine cost versus rent that never stops versus a building addition — find the crossover year for your numbers, with editable example assumptions and a downloadable comparison.
All amounts are USD. Replace these illustrative inputs with quotes for the same usable space and scope.
4,000 sq ft over 10 years
Mezzanine
$295,000
$280,000 capital + upkeep
Lease
$584,658
rent + CAM with escalation
Addition
$560,000
capital only; operating costs excluded
Cumulative lease spending first meets or exceeds the mezzanine cost in year 6 at these inputs.
| Year | Lease | Mezzanine |
|---|---|---|
| 1 | $51,000 | $281,500 |
| 2 | $103,530 | $283,000 |
| 3 | $157,636 | $284,500 |
| 4 | $213,365 | $286,000 |
| 5 | $270,766 | $287,500 |
| 6 | $329,889 | $289,000 |
| 7 | $390,786 | $290,500 |
| 8 | $453,509 | $292,000 |
| 9 | $518,114 | $293,500 |
| 10 | $584,658 | $295,000 |
This compares undiscounted cash spending, not investment return or NPV. Include freight, installation and site work in your capital inputs. Financing, income taxes, moving costs, residual value and the addition's operating costs are excluded. Review alternatives with your finance and project teams.
Methodology and scope
The defaults illustrate the calculation; they are not verified national averages or a quotation. Enter an installed mezzanine budget that includes your required site work. Annual lease spending equals area × base rent × the compounded escalation factor × (1 + CAM). Mezzanine spending equals the capital budget plus the annual upkeep allowance for each year.
The building-addition number is capital only, so it is not a complete total-cost comparison. Equal area also does not guarantee equal operational value: compare access, workflow and usable capacity with your project team.
Use the planning checklist and quote comparison sheet to align proposal scope. The cost calculator shows its own assumptions; the cost guide explains how to interpret budget figures. The ROI guide discusses the wider business case.
Frequently asked questions
When does a mezzanine cost less than leasing?
The crossover depends on your installed budget, base rent, CAM, rent escalation, annual upkeep and occupancy period. The calculator reports the first year cumulative lease spending meets or exceeds the mezzanine scenario. It does not guarantee a payback period.
Are the defaults market averages?
No. They are editable example assumptions: 4,000 sq ft, USD 70 per sq ft for the mezzanine, USD 10.20 annual base rent, 25% CAM, 3% rent escalation, USD 140 per sq ft addition capital, USD 1,500 annual mezzanine upkeep and ten years. Replace them with comparable project quotations.
Is new construction compared on the same basis?
The addition figure shows capital cost only. It excludes the addition's ongoing operating costs. The mezzanine includes the entered upkeep allowance and the lease includes rent and CAM. These scopes are labeled separately rather than presented as equal total ownership costs.
Does the calculator include financing, taxes or NPV?
It compares undiscounted spending. Financing, income taxes, depreciation, moving costs and residual value are excluded. The CAM input can represent property taxes charged with rent. Have your finance team evaluate a full investment model.
Can I download the comparison?
Yes. Download a CSV containing your inputs, cumulative spending for each year, the addition capital estimate and the exclusions. Nothing needs to be submitted to a supplier.