Pricing a self-storage offer when the cap rate and the rent roll tell different stories
The conventional wisdom in this room is that you cap the trailing twelve months of net operating income at the market rate, land on a number, and negotiate from there. That works cleanly when the rent roll is honest and the expense column is disciplined. It stops working the moment the seller has been running the property as a side project for eight years and expensing personal vehicle costs through the business, or the moment street rates in the submarket moved six months ago and the current tenants are still on rates from two winters back.
Take a 120-unit facility asking 1.1 million at a stated 7.5 cap. The seller's NOI is 82,500. You pull the rent roll and the average in-place rate is 94 dollars per unit per month across a mix of 10x10s and 10x20s. Street rate for a 10x10 in the same zip is 119 on the two closest competitors' websites today. That gap is either recapture upside or a signal that the submarket can't hold 119 and the seller's tenants know something. The offer price depends entirely on which of those is true, and you cannot know from the pro forma.
The expense side is where I spend the most time before I put a number on paper. Management at six percent of gross is 59,400 times six percent, call it 3,564 per year if you self-manage and you're not counting your own time. If you bring in a third-party operator the fee is real and it belongs in the denominator. Get two actual quotes from operators who cover that market before you touch the NOI. Property tax is the other number that sellers consistently state at the current assessed value, which resets on sale in most states. Call the assessor's office, ask what the transfer triggers, and model the higher number. Those two adjustments alone can drop a stated 82,500 NOI to something closer to 71,000, which at a 7.5 cap is a 947,000 property, not 1.1 million.
The offer I'd build starts from the NOI I can verify, not the one on the summary deck. I cap that number at the market rate for the asset class and market, I add a separate line for the provable upside in rate recapture discounted by a 50 percent probability of actually achieving it over 18 months, and I subtract the deferred maintenance I can see in photos or on a walkthrough. That math gives me a walk-away number. I offer below it with enough room to move once, because sellers who have run a facility for eight years read a first offer that is too close to their ask as confirmation that they should hold for more.
The question the final offer number actually has to answer is not what does the market say this cap rate should be, it is what NOI am I confident I can defend in 90 days if rates stay flat and two tenants leave in month one. What does your rent roll show as the gap between in-place and street rate, and have you confirmed what a sale triggers on the tax assessment?