Imagine youre under contract on a single small-bay industrial building where one lease renewal next year could swing the deal from cashflow-positive to a headache. You need to underwrite industrial property quickly and with confidence so you can decide whether to close, walk, or renegotiate.
The core idea, simply
Underwrite industrial property like a deal operator, not a spreadsheet jockey. Start with the rent roll and leases, convert to a defendable Net Operating Income (NOI), test value with cap-rate math, stress-test the debt, and then attack tenant and expense risk. Keep assumptions tight and defensible: if a landlord-level assumption cant be backed with a document or a local broker check, dont put it in the model.
1) Documents first: what you actually need
Stop wasting time on fancy comps until you have three things: the rent roll (read the rent roll like an underwriter), lease agreements, and 23 years of income & expense statements. For small-bay industrial that will tell you where the cash actually comes from and where it goes. (Scattered files will slow LOIs and due diligence: how disconnected documents slow LOIs and due diligence.)
- Rent roll: confirm suites, square footage splits, base rent, invoiced CAM or NNN charges, and any concessions or free-rent periods.
- Leases: read them. Know expiration dates, options, who pays what, and any unusual clauses (e.g., exclusive use, environmental indemnity).
- P&Ls and trial balances: reconcile the rent roll to bank deposits (see how to organize property documents, inspections, and deal notes). Watch for owner-paid capital items being passed as OPEX.
Practical tip: build a lease expiry timeline and a one-page cashflow summary in plain English. If you cant explain next years cashflow in three sentences, your model is lying.
2) Build NOI defensibly what to normalize and what to keep
NOI is the heartbeat of the underwrite. For industrial, operating expenses should reflect what a third-party owner actually pays. That means:
- Keep recurring items: property taxes, insurance, utilities where landlord pays, routine repairs, management fees.
- Strip out owner-specific items: related-party management markups, discretionary capital that wont recur, one-off legal collections (unless likely to recur).
- CapEx: separate it from NOI. Put capital reserves in the model as a line item, not buried in OPEX.
When you lack reliable expense history, use the rent roll and local market checks to sanity-test each line. Dont accept a sellers pro forma that piles in upside without supporting documents. For a broader methodology, see commercial real estate underwriting: a practical guide.
3) Cap-rate math and valuation (use the right band)
Value is simple: Value = NOI / Cap Rate. For small-bay industrial that formula is your blunt instrument. The recent market guidance suggests industrial cap rates often sit within a band; use that band to stress the deal rather than a single point estimate.
Work in three scenarios: tight cap (low end of the band), mid-band, and loose cap (high end of the band). That gives you a fast sensitivity table and shows how much cap compression or expansion the underwrite survives.
Practical math setup: calculate current stabilized NOI, then divide by the cap-rate band to get a valuation range. If your purchase price sits above the valuation at the tight cap, you need a very strong operational case or a clear exit that justifies paying a premium.
4) Tenant risk is the driver concentration, covenants, and timing
Small-bay industrial often looks diversified on paper but still concentrates risk. A single mid-size tenant leaving can create vacancy and re-tenanting costs that blow your hold-year returns.
- Concentration: flag any tenant that makes up more than a third of rent. Treat those leases like single-tenant deals more scrutiny, higher reserves, and different financing assumptions.
- Covenants & credit: actual financial statements are ideal. If you dont have them, get trade references or broker intel. For small-bay tenants, cash flow fragility matters more than credit ratings.
- Timing: leases expiring inside your first 1224 months are the real risk. Model vacancy and leasing downtime explicitly for those buckets.
Mini-case (structure, no invented dollars): we underwrote a small-bay building where three tenants produced the rent and one tenants lease expired in year one. Instead of assuming renewal, we modeled a conservative vacancy period, leasing concessions, and short-term hold costs. The result: the deals IRR halved unless we pushed price down or added modest capital improvements to broaden market appeal.
5) Debt sizing and stress tests
Debt kills bad deals and magnifies good ones. Test debt two ways: a baseline that assumes you get your target terms, and a stress case that tightens terms and pushes NOI down. Use debt service coverage as your primary gate.
Industry practice commonly uses a minimum Debt Service Coverage Ratio (DSCR) threshold for industrial loans. Treat a DSCR requirement as a hard stop: if your underwrite cant clear the lenders DSCR under reasonable stress, the equity return math isnt credible. Build a sensitivity table that sweeps NOI and interest cost to show where the DSCR falls below the lenders requirement.
Dont forget loan sizing limits tied to appraised value. Lenders will use a similar cap-rate approach on stabilized NOI to set LTV. If your purchase price requires the lender to accept a lower cap than the market band, be prepared to bring equity. For background on common loan types, see types of commercial real estate loans (and when each fits).
Mini-model example (template you can copy)
Dont make your first run pretty make it honest. Heres the quick template to drop into a model:
- Input: current rent roll (monthly rent by suite), lease expirations, expense lines, reserves.
- Step 1: reconcile rent roll to historical deposits flag variances.
- Step 2: build stabilized NOI remove owner-specific items, add market-based reserve for capital expenditures.
- Step 3: value band divide stabilized NOI by cap-rate low, mid, high.
- Step 4: debt test apply target loan terms, calculate DSCR; then run a stress case with reduced NOI to check DSCR again.
- Step 5: upside scenarios incremental rent roll improvements, lease-up timing, or value-add costs and timing.
Copy that into any spreadsheet. If you cant explain each input to a lender or a partner in one sentence, its not defensible in a bid negotiation.
What operators get wrong (and how to avoid it)
- Over-optimistic vacancy assumptions: assume market downtime for your product type, not the best-case optimistic broker pitch.
- Mixing capex with OPEX: youll understate real costs. Treat capital separately and fund reserves appropriately.
- Using one cap-rate: always stress the cap-rate. One point difference moves value materially.
- Ignoring tenant holdover & relocation costs: for small-bay deals, the turnaround can cost more than you think.
Where a CRE-specific tool helps
If youre worried about deals slipping because next steps are unclear, a CRE tool that combines an Investment pipeline, Action Center, and configurable deal stage triggers makes it easier to turn stage changes into visible tasks and follow-ups so nothing falls through the cracks. Use those controls to keep follow-ups, lease expirations, and refinancing milestones in one place and visible to the deal owner. If you want to see how that looks in practice, you can track your acquisitions pipeline in CREflow.
Key takeaways
- Get the rent roll, leases, and 23 years of P&Ls before you price the deal.
- Build NOI conservatively: strip owner items, separate capex, and use market checks for unknowns.
- Value with a cap-rate band and run multiple scenarios dont rely on a single number.
- Treat tenant concentration and near-term expirations as deal-defining risks.
- Use DSCR as your debt gate and stress test NOI and interest cost together.
FAQ
What if I dont get full financials from the seller?
Work from the rent roll and bank statements. Reconcile deposits to the rent roll. Use local broker checks for market rents and conservative expense benchmarks. If you still have big gaps, price for the uncertainty or walk dont invent income.
Which cap-rate should I use for small-bay industrial?
Use a cap-rate band rather than one point. The recent guidance suggests an industrial cap-rate band; run low, mid, and high points in your model to see how sensitive value is to cap-rate movement.
How much reserve for capex should I budget?
Budget a realistic, line-item reserve for roof, dock doors, paving, and mechanicals. Treat it separately from routine repairs. If you lack historic capex, add a conservative placeholder and get quotes early in diligence.
When is it acceptable to rely on pro-forma rent?
Only when you have signed leases or strong evidence (tenant LOIs with security, market comps, or executed expansions). Dont base acquisition pricing on aggressive future rents without documentation.
How tight should my DSCR be?
Treat lender DSCR requirements as a hard constraint. Industry practice commonly uses a minimum threshold; if your stress-case pushes DSCR below that, you need to reprice, add equity, or shrink debt.
Before You Underwrite This, Check This:
- Do you have a clean rent roll and the actual lease PDFs? If not, get them before you bid.
- Can you reconcile the rent roll to bank deposits or P&L entries? If not, call the seller for clarification or price the gap.
- Have you separated capex from OPEX and added realistic reserves? Dont bury capital in operating expenses.
- Have you run a DSCR stress with a tightened NOI and higher interest cost? If not, run it now.
- Do you have a cap-rate band for the market? If not, ask local brokers and run low/mid/high cases.