How To Value A Self-Storage Facility (The Supply-And-Demand Method)

Cap-rate-times-NOI is a starting point, not a valuation. It tells you what a property is worth if nothing about its market changes and if the in-place rents already reflect what the market will bear. Neither assumption survives contact with a real property market.

Start with supply

Supply is every unit competing for the same renter: REIT operators, independents, and anything in the permit pipeline that will open in the next 18 to 36 months. Count it by distance, not by city. A facility three miles away on the same commute corridor competes harder than one across town.

Then measure demand

Demand is households, income, and the signals that predict storage need: new construction, apartment turnover, and population change, measured in rings around the subject property, not a citywide average that hides the actual property's market.

Fuse them into a rate position

Once you know supply and demand for the property's actual market, you can place the subject property's rates against the market: below, at, or above what the market supports. That position, not the in-place T-12 alone, is what should drive your valuation range.

Where this method changes the number

If a facility is priced below its market's rate position, a supply-and-demand valuation will show upside a pure cap-rate model misses entirely. If it is priced above, the same method will flag risk a broker's pro forma usually smooths over.

A worked example: move from rate evidence to value

Assume an illustrative 50,000-square-foot facility produces $720,000 of annual revenue. Current nearby rates and unit availability support $780,000 at stabilized occupancy. After a realistic move-in schedule, use $760,000 rather than taking the full gap on day one. If normalized operating expenses are $340,000, the supported NOI is $420,000.

The cap rate is still an assumption. The improvement is that it is applied to an NOI tested against actual supply, demand, and a transition timeline. Pressure-test the result at several rates and revenue cases before using it in an offer.

Source hierarchy

Use timestamped operator rate shops for current asking rents, local planning departments for permits, and the U.S. Census Bureau's ACS Data Profiles for household, income, and housing context. Record the date and geography of every source so another reviewer can reproduce the conclusion.

The practical version

• Pull competitor rates and distance for every relevant nearby facility.
• Check the permit pipeline for anything under construction or approved.
• Measure households, income, and rent burden at 1, 3, and 5 miles.
• Compare in-place rents to the market's supported rate, not the seller's asking number.