What Is NOI and Why It Matters More Than Revenue When Selling Your Storage Facility
Most owners focus on what they bring in. Buyers focus on what’s left over. Here’s why that distinction determines your sale price.
The most common surprise in our valuation conversations isn’t about cap rates or market conditions. It’s simpler than that.
It’s the moment a storage owner realizes their gross revenue isn’t the number a buyer is going to use to determine what their facility is worth.
The number that actually drives valuation is Net Operating Income — NOI. And once owners understand what it is and how it’s calculated, two things usually happen: they understand the offer they received a lot better, and they start to see what they can do before going to market to improve it.
Here’s the plain-English version.
What is NOI?
Net Operating Income is what’s left from your facility’s revenue after you pay your operating expenses — but before you pay any debt.
NOI = Gross Revenue − Operating Expenses
Operating expenses include everything it costs to run the facility: property taxes, insurance, utilities, maintenance and repairs, landscaping, management fees, and administrative costs. What they don’t include is your mortgage payment or any other debt service. That’s intentional — buyers are buying the income the property produces, not the financing structure you have on it.
So if your facility collects $300,000 in gross revenue and your operating expenses total $160,000, your NOI is $140,000.
That $140,000 is what a buyer is actually purchasing when they buy your facility. And it’s what they’ll divide by their target cap rate to arrive at a price.
Why expenses matter as much as income
Here’s something that surprises a lot of owners: two facilities with identical gross revenue can sell for dramatically different prices — simply because of how their expenses are managed.
Take two facilities, each generating $300,000 in annual revenue:
Facility A | Facility B | |
Gross Revenue | $300,000 | $300,000 |
Operating Expenses | $180,000 | $140,000 |
NOI | $120,000 | $160,000 |
Sale Price (7% cap) | $1,714,285 | $2,285,714 |
Same revenue. Same market. $571,429 difference in sale price.
That gap isn’t the result of luck or timing. It’s the direct result of how tightly Facility B is managed. And it’s entirely within your control before you go to market.
What this means before you sell
If you’re thinking about selling your facility in the next one to three years, NOI is the most important number to understand — and to improve. Here are three places to focus:
Review your property tax assessment. Your property tax assessment. Many storage owners pay more in property taxes than they need to because they’ve never challenged their assessment. An appeal — especially in markets where values have shifted — can reduce this line item meaningfully.
Understand the management recast. Management costs if you’re self-managing. If you run the facility yourself without paying yourself a market-rate management fee, your NOI looks artificially high. A sophisticated buyer will recast your financials to add in a management expense — typically 5–8% of gross revenue. It’s better to understand this adjustment before you sit across the table from a buyer.
Address deferred maintenance now. Deferred maintenance that becomes an operating expense. Small repairs that haven’t been addressed become cost items in a buyer’s model. Addressing them before going to market prevents buyers from adjusting their offer downward — and signals that the facility has been well cared for.
How buyers look at your NOI
One thing that catches sellers off guard is that buyers don’t just accept your stated NOI at face value. They recast it — meaning they adjust your income and expense figures based on what they believe the facility will actually earn and cost under their ownership.
Common recast adjustments include:
Adding a management fee if you’ve been self-managing without one
Normalizing one-time expenses that artificially inflated costs in a particular year
Adjusting insurance premiums to current market rates if yours are unusually high or low
Adding a capital reserves line item if the facility has significant deferred maintenance
This isn’t a trick or a negotiating tactic — it’s how professional buyers model income properties. The more you understand about how your facility will be recast, the less surprised you’ll be by the offer you receive, and the better positioned you’ll be to respond to it.
Want to know what your NOI looks like to a buyer?
We do free, no-pressure valuation conversations with self-storage owners across Colorado, Arizona, Nevada, Idaho, and Utah. In 30 minutes, we’ll walk through your revenue and expense structure, talk through any recast adjustments that might apply, and give you an honest picture of how a buyer would model your facility.
No broker. No commitment. Just two people who’ve been on your side of a sale and know how to explain the math.
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