How I value a small self-storage facility before I ever look at the seller's numbers
Most new storage buyers start with the seller's pro forma. That's the fastest way to overpay. A pro forma shows what a facility could be. You should pay for what it is, then check what it could become.
Here's the first-pass filter I run on every deal before I spend real time or money on it:
Call around and get local street rates for a 10x10 and a 10x15. Real rates from competitors, not the seller's asking rents.
Turn those into an average rent per square foot and apply it to the facility's rentable square feet.
Assume about 85% occupancy for a stabilized facility.
Take out about 35% for expenses. Sellers almost always understate this.
Divide that net income by an 8% cap rate. That's my stabilized value.
My max offer is about 75% of stabilized value. That gap is what pays for the work, the risk, and the time it takes to get there.
Then one quick sanity check: compare the asking price to current monthly rent. Below 100x monthly rent is ideal. When a deal is way above that, the seller is usually pricing in upside you'd have to create yourself.
Adjust the cap rate and expenses for your market. This won't tell you a deal is good. It'll tell you quickly when one isn't, so you don't burn weeks on it. Every deal that passes still needs full underwriting.
For those of you buying storage right now, what does your first-pass screen look like? Do you use a rent multiple, or go straight to cap rate?