Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Lower net cost option
Bigger House
Storage rent total
$18,000
Bigger house net cost
$4,943
Difference over horizon
$13,057
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How to use this
- 1Enter storage unit monthly rent ($).
- 2Enter cost of extra square footage needed ($).
- 3Enter mortgage rate (%).
- 4Enter property tax rate (%).
- 5Enter expected annual appreciation (%).
- 6Enter years to project.
- 7Read your lower net cost option on the right — it updates as you type.
- 8Hit Share to keep the scenario or send it to someone.
About this calculator
Renting a self-storage unit for excess belongings costs a fixed monthly fee that continues forever, while buying a bigger house to fit everything raises your mortgage payment but builds equity in that extra space. This tool compares years of storage rent against the extra amortized cost of financing additional square footage, net of the equity you'd build, to see which is truly cheaper for your timeline.
Worked example
Using the values the calculator loads with:
Inputs
- Storage unit monthly rent: 150 $
- Cost of extra square footage needed: 40000 $
- Mortgage rate: 6.5 %
- Property tax rate: 1.1 %
- Expected annual appreciation: 3 %
- Years to project: 10
Results
- Lower net cost option: Bigger House
- Storage rent total: $18,000
- Bigger house net cost: $4,943
- Difference over horizon: $13,057
What each field means
Inputs
- Storage unit monthly rent ($)
- The storage unit monthly rent used in the calculation, measured in $. Starts at 150 $ so you have a working example on load.
- Cost of extra square footage needed ($)
- The cost of extra square footage needed used in the calculation, measured in $. Starts at 40000 $ so you have a working example on load.
- Mortgage rate (%)
- The mortgage rate used in the calculation, measured in %. Starts at 6.5 % so you have a working example on load. Accepted range: 0–15 %.
- Property tax rate (%)
- The property tax rate used in the calculation, measured in %. Starts at 1.1 % so you have a working example on load. Accepted range: 0–5 %.
- Expected annual appreciation (%)
- The expected annual appreciation used in the calculation, measured in %. Starts at 3 % so you have a working example on load. Accepted range: 0–10 %.
- Years to project
- The years to project used in the calculation. Starts at 10 so you have a working example on load. Accepted range: 1–30.
Results
- Lower net cost option
- Returned as a plain value and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Storage rent total
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Bigger house net cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Difference over horizon
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Why does the bigger house model appreciation?
Extra square footage is an asset that (usually) gains value, partially offsetting the extra interest and tax cost — storage rent builds no equity at all.
When does storage clearly win?
When you only need extra space temporarily (a move, seasonal gear, a life transition) — storage is flexible and cancellable, while a bigger house is a long-term commitment with closing costs to reverse.
Does this include moving costs into storage?
No — add a one-time moving/transport cost to the storage side if relevant; it's typically small relative to years of rent.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Self-Storage vs Bigger House Cost Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/self-storage-vs-bigger-house-cost
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/self-storage-vs-bigger-house-cost" target="_blank" rel="noopener">Self-Storage vs Bigger House Cost Calculator — RevenueLab</a> (2026).</p>
Source: [Self-Storage vs Bigger House Cost Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/self-storage-vs-bigger-house-cost) (2026).