Self Storage Valuation Calculator
Self storage valuation comes down to one relationship: a facility is worth its net operating income divided by a market cap rate. Enter a normalized NOI and a cap rate below to estimate value the way an appraiser and a lender do, see how sensitive that number is to the rate, and cross-check it per square foot.
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How to value a self storage facility
The self storage property valuation that lenders and appraisers rely on is the income approach: capitalizing income into value. It is the same math as a cap rate, run in reverse: instead of dividing income by price to get a rate, you divide income by a rate to get price.
Value per sq ft = Value ÷ Net rentable square feet
Two inputs decide almost everything, so both have to be honest. Use a normalized, trailing-12 NOI (the same figure a broker's offering memorandum tends to inflate) and a cap rate drawn from real comparable sales in that submarket. Because value is income divided by a small percentage, the cap rate is a powerful lever: the sensitivity table above shows how a half-point either way moves the valuation of self storage facilities by hundreds of thousands of dollars. For the underlying concept, Investopedia's income approach primer is a solid reference.
Valuation methods and the appraisal
A full self storage appraisal weighs three approaches. The income approach above is primary for a stabilized facility. The sales comparison approach benchmarks against recent storage facility sales on a price-per-foot and price-per-unit basis. That is the cross-check this tool provides. The cost approach, most relevant for new construction, asks what it would cost to rebuild. A self storage business valuation may also layer in a management platform or brand, but for a single asset the real estate income drives the number. Mini storage valuation and mini storage appraisal follow the identical logic at smaller scale. Storage unit valuation still flows from capitalized income, not square footage alone.
Valuation FAQ
How do you value a self storage facility?
The primary method is the income approach: divide normalized net operating income by a market capitalization rate. Value = NOI ÷ cap rate. A facility with $350,000 of NOI valued at a 6.5% cap rate is worth about $5.38M. Appraisers cross-check that against recent sales of comparable facilities (the sales comparison approach) and, for newer builds, replacement cost. Income drives the number; comps and cost keep it honest.
What is the difference between an appraisal and a broker opinion of value?
A self storage appraisal is a formal, USPAP-compliant valuation by a licensed appraiser, typically ordered by a lender and defensible in underwriting. A broker opinion of value (BOV) is a lighter, free estimate a broker provides to win or price a listing. It is useful directional input, but often optimistic because the broker represents the seller. For a purchase or a loan, get the appraisal; use the BOV to sanity-check the asking price.
What cap rate should I use to value self storage?
Use the prevailing cap rate for comparable facilities in that specific submarket, applied to a realistic, normalized NOI, not the seller’s pro forma. Cap rate is the single biggest lever on value: at $350,000 NOI, moving from a 6.0% to a 6.5% cap rate lowers the valuation by roughly $450,000. The sensitivity table above shows exactly how much your value swings with the rate.
How much is my self storage business worth?
Start with the income approach on this page: normalize your trailing-12 NOI and divide by a market cap rate to get self storage market value. Then adjust for factors an appraiser weighs: deferred maintenance, lease-up upside, market rents versus in-place rents, and expansion land. The result is a defensible valuation range, not a single number; that range is what you negotiate within.
Does the building’s square footage determine value?
Not directly. Income does. Two facilities of identical square footage can be worth very different amounts if one earns more per foot. Price per net rentable square foot and price per unit are cross-checks against comparable sales, not the primary driver. A facility is worth what its normalized income, capitalized at a market rate, says it is worth.
Related: cap rate calculator, NOI calculator, ROI calculator, and all self-storage investment calculators.