Learning how to evaluate a commercial real estate acquisition is not learning to price a building. It is learning to run a go/no-go read fast enough to protect your earnest money and your reputation with the seller. A principal does not underwrite every deal to the decimal — he builds a value range, hunts for the two or three things that would kill the deal, decides what he would actually pay, and only then spends real diligence dollars confirming or breaking the thesis. The order matters as much as the math.
Start with a value range, not a price
The broker gives you an asking price. That number is a negotiating position, not a value. Your first job is to build an independent range — a floor and a ceiling — before the deal's framing anchors you. Three lenses get you there quickly:
- In-place cap rate — trailing-12 net operating income divided by the ask. If the T-12 NOI is thin or propped up by one large tenant, the in-place number is fragile and the ask is aspirational.
- Stabilized / forward cap rate — NOI after the obvious, provable moves: rolling below-market leases to market, filling known vacancy, cutting a fat expense line. This is where the real thesis lives, and where sponsors talk themselves into deals.
- Price per square foot vs. replacement cost — buying well below the cost to build is a margin of safety; buying above it means you are paying for a story.
The gap between your floor and the ask tells you whether this is a conversation or a pass. If the ask sits above your stabilized value, the deal only works if the seller is wrong about the market or you are wrong about your assumptions — and you should assume it is you.
The sequence a principal runs first
Before you order a single third-party report, you can screen most deals in an afternoon. The point is to spend money only on deals that survive the free work.
This is the same discipline behind a defensible underwriting model — the mechanics differ by asset type, and our walkthroughs on underwriting a multifamily acquisition and underwriting a net-lease acquisition show how the sequence bends to each.
The red flags that kill a deal
A buy-or-pass read is mostly a search for disqualifiers. Some problems are priceable; others end the conversation. The ones that end it:
- Concentration you cannot survive — a single tenant at 40%+ of income with a near-term expiration and no renewal signal. If that tenant leaves, the whole thesis leaves with them.
- NOI built on a one-time event — a percentage-rent spike, a tax appeal that will reverse, a deferred-maintenance holiday. Trailing NOI that cannot repeat is not NOI.
- Below-market rents that are contractually locked — a rent gap only helps you if you can capture it inside your hold. Fifteen years of remaining term at a 30% discount is a liability disguised as upside. Confirm it against the leases, not the rent roll — our note on what a lease abstract should include covers the clauses that hide it.
- Capital you cannot see the bottom of — a roof, a parking field, a facade, or deferred tenant improvements that turn a 6.5% going-in yield into a 4% real one after year one.
- A basis above replacement cost — if a competitor can build newer down the street for less than you are paying, your rents are exposed the moment they do.
Priceable problems — a soft submarket, a lease that rolls in year three, a management change — go into the offer as price or structure. Deal-killers go into the pass pile. The skill is knowing which is which before you fall in love with the pro forma.
What to actually pay
Your offer is your stabilized value discounted for the risk you are taking on and the return your capital requires — not the ask minus a polite haircut. Work backward: start from the exit you can defend, subtract the capital and time to get there, apply your equity's required return, and the residual is what you pay today. If that number embarrasses you relative to the ask, that is information. A disciplined buyer would rather lose ten deals on price than win one on optimism.
Every acquisition is a bet that a specific NOI shows up at a specific time. Price the bet, not the story.
The diligence that confirms or breaks the thesis
Under contract, diligence is not a box-checking ritual — it is the test of the one-page thesis you wrote. Spend the money where the thesis is most exposed:
- Estoppels and lease audits — confirm the rent roll against signed documents. Options, co-tenancy clauses, and offset rights change value and rarely appear in the summary.
- Property condition and environmental — quantify the capital you priced as a guess. A PCA that lands above your reserve is a re-trade, not a surprise.
- Financial verification — tie the T-12 to bank statements and tax bills. Reassessment at your purchase price is the single most common line sponsors forget.
- Market rent evidence — real comparable leases, not CoStar averages, behind every mark-to-market dollar in your model.
Organize all of it the way you would want it organized if you were the investor reading it later — our guide to building a real estate data room is the structure. The diligence that confirms your thesis becomes the spine of the offering; the diligence that breaks it saves you from your worst deal.
Where principal review catches what a template misses
A model can be arithmetically perfect and strategically wrong. The judgment calls — is this rent gap real or locked, is this tenant a credit or a countdown, is this exit cap a market or a hope — are the difference between a credible acquisition and an expensive lesson, and they do not live in the cells of a spreadsheet. That is the layer a founder who raises on his own deals brings to institutional underwriting and hands-on acquisition advisory: the second read that tests the thesis, not just the formulas.
The same rigor that makes a buy/pass decision credible is what makes the raise credible. When the deal survives your read, the underwriting and diligence become the evidence base for the offering — the memo, the model, and the investor page all trace back to the thesis you defended. Sponsors turn that work into investor-ready deal materials at flat, published fees, so the story the market sees rests on the same numbers you used to say yes.
The value range and the red-flag read cost you an afternoon; the deal they save you from costs years. Evaluate to find the disqualifiers first — then spend diligence dollars proving the thesis you already believe, not discovering one you never had.
Need this on a live deal? Capistrano produces underwriting, lease abstracts, investment memos, and capital-raise materials — AI-leveraged, principal-reviewed.