I'm analyzing my first potential commercial real estate investment, a small retail strip, and while I understand the cap rate formula, I'm struggling to determine what a "good" cap rate is for this specific asset class and location. The broker's pro forma shows an attractive rate, but I'm skeptical about the accuracy of the projected net operating income, especially regarding vacancy and maintenance costs. For experienced investors, how do you underwrite the NOI to arrive at a realistic cap rate for your analysis? What are the red flags you look for in a seller's provided numbers, and how much does your target cap rate adjust based on factors like tenant credit, lease terms, and the age of the property?
Great question. A practical way to underwrite NOI is to build a defensible baseline rather than take the broker’s numbers at face value. Start with the rent roll and apply a vacancy allowance based on local market conditions plus a cushion (think market vacancy plus 2–4%). Then subtract operating expenses (property taxes, insurance, maintenance, management) and set aside a capital expenditure reserve (commonly 1–2% of property value or a fixed annual amount). Your stabilized NOI becomes: (Potential Gross Rent × (1 − vacancy)) − OpEx − CapEx Reserve. Run 2–3 scenarios (base, downside with higher vacancy/maintenance, upside with rent growth) and see how cap rate shifts.
Red flags to watch in a seller’s pro forma: vacancy/occupancy numbers that seem too perfect, rent growth that outpaces market trends, missing or understated operating expenses, no clear CapEx plan or reserve, unusual or vague CAM charges, inconsistent rent rolls vs. leases, free rents or concessions that aren’t clearly accounted for, and any items cited as “owner pays” that won’t transfer. If the NOI hinges on optimistic renewals or tenant improvements, treat it skeptically and push for third-party verification.
Cap rate adjustments should reflect risk. When tenant credit is strong and leases are long with clear escalations, you can justify a lower cap-rate premium; poor credit, short terms, or a building with deferred maintenance warrants a higher premium. In practice, if the market shows 6% for a stable asset, expect mid-6% to low-7% for decent risk; if there are significant redevelopment needs or weak tenancy, 7%–8% or higher isn’t unusual. Size up the moat: location submarket, lease terms (NNN vs gross), age and condition, capex needs, and the potential for rent growth.
Underwrite in a disciplined 6-step process: 1) obtain a clean rent roll and verify tenancy; 2) normalize expenses by reclassifying one-offs and seasonals; 3) build a 3-scenario NOI forecast (base, downside, upside); 4) compute cap rate for each scenario; 5) run sensitivity on vacancy, rent growth, and major expense items; 6) cross-check with local comps and a broker’s market view. Add a small reserve for unknowns and a bottom-line stress test for financing terms.
Useful signals to gather beyond the broker’s numbers: recent rent comps in the same submarket, current occupancy trends, landlord-friendly lease terms, and the net effect of CAM/expenses. Talk to a local property manager or broker to validate assumptions. Use third-party reports for cap rates in the area and compare to your own projections. A quick due diligence checklist includes: lease abstracts, repair histories, building inspections, and confirmation of any abatements or incentives that may expire.
If you’d like, tell me your location, property type (strip center vs. standalone), and the typical tenant mix; I can tailor a 2–3 page underwriting checklist with neighborhood comps and a sample model that you can adapt.
Want a practical template? I can sketch a simple Excel pro forma with inputs for occupancy, rent per sf, OpEx, CapEx reserve, and financing terms, plus a 3-scenario output and a quick cap-rate sensitivity table.