Commercial · Question answered
Top 10 Questions to Ask Before Buying a Commercial Property in San Antonio
Ten due-diligence questions every investor should answer before making an offer on a San Antonio commercial property — from verifying income and rents to modeling post-sale taxes, environmental risk, financing, and exit.
Short answer
The direct answer.
Before buying a commercial property in San Antonio, verify the actual income and expenses, test the durability of the rents, understand real occupancy, budget for deferred maintenance, confirm zoning and permitted use, model a realistic post-sale tax bill, check for environmental risk, evaluate tenants and leases, pre-qualify financing, and define an exit plan. The goal of due diligence is not to justify buying — it is to see whether the deal still works after the optimistic assumptions are removed.
Why it matters
Commercial property can build income, equity, and long-term wealth — but expensive mistakes usually come from moving too quickly on a marketed cap rate before verifying the underlying financials, leases, and physical condition.
A deal that only works under perfect assumptions is a fragile one. The purpose of due diligence is to know which risks you are accepting, what they could cost, and whether the expected return justifies them.
How to Work Through Commercial Due Diligence
Start with financial performance, but do not rely on the offering memorandum. Request the current rent roll, trailing 12 months of profit-and-loss, all leases, property-tax records, insurance policies, utility bills, and repair history. Compare those documents against the advertised NOI — the question is whether the income is actually being collected and whether expenses reflect the true cost of operating the property.
Then pressure-test the assumptions Texas exposes: reassessed property taxes at your purchase price, an insurance quote on the specific property, deferred maintenance quoted by real contractors, zoning and certificate of occupancy for your intended use, environmental screening for any prior industrial or automotive uses, and financing terms from a commercial lender based on the property that exists today — not the stabilized version you hope to create.
10 Due-Diligence Questions Before Buying San Antonio Commercial Property
| Question | Why It Matters | What to Verify |
|---|---|---|
| 1. Can the income and expenses be verified? | Advertised NOI often relies on pro forma, not collections | Rent roll, T-12 P&L, leases, tax + insurance bills, utility + repair history |
| 2. Are the rents sustainable? | Above-market rents create rollover risk; specialized space is hard to re-lease | Market comps, lease terms, renewal options, concessions, tenant pool depth |
| 3. What does the advertised occupancy really represent? | Physical, leased, and economic occupancy can differ significantly | Concessions, delinquencies, owner-occupied units, free-rent periods |
| 4. What major expenses are waiting after closing? | Deferred CapEx transfers to you at closing | Roof, HVAC, parking, plumbing, electrical, life-safety inspections + bids |
| 5. Is your intended use actually permitted? | Current use doesn't guarantee your use is legal | Zoning, certificate of occupancy, parking, signage, access, code compliance |
| 6. Could property taxes change after purchase? | Reassessment at your purchase price can shrink NOI and DSCR | Bexar CAD history, taxing entities, exemptions, post-sale tax model |
| 7. Are there environmental risks? | Contamination can block financing, insurance, redevelopment, and resale | Phase I ESA; further testing on former gas, dry-clean, auto, or industrial uses |
| 8. How strong are the tenants and leases? | Fully leased ≠ low risk; one tenant can dominate revenue | Payment history, renewals, terminations, guarantees, landlord obligations |
| 9. Will the property qualify for the financing you expect? | Value-add and vacant properties are financed very differently than stabilized ones | Down payment, LTV, DSCR, reserves, recourse, and CapEx funding with a lender |
| 10. What is the exit strategy? | Cash-flowing properties can still be hard to sell | Buyer pool (investors vs. owner-users), refi path, zoning + layout limits |
San Antonio / Hill Country example
Stress-Test the Deal Against What Could Go Wrong
An investor is evaluating a small mixed-use property in San Antonio marketed at a 7.8% cap rate. The rent roll shows 95% occupied. On closer review, one tenant produces 60% of the income, has 14 months remaining on the lease, and pays roughly 20% above market. The seller's property tax bill reflects an assessed value about 30% below the asking price, and no Phase I has been performed despite a former automotive tenant next door.
After modeling a realistic post-sale tax reassessment, a market-rent renewal on the anchor tenant, and a $60,000 environmental review contingency, the true stabilized cap rate is closer to 6.1% with meaningful rollover risk in year two. The property may still be worth pursuing — but only after the price, terms, or business plan reflect what the numbers actually support.
Common mistakes
- Underwriting from the offering memorandum instead of the actual rent roll, leases, and trailing 12 months of financials.
- Carrying the seller's current property tax bill forward instead of modeling a post-sale reassessment.
- Confusing physical occupancy with economic occupancy — ignoring concessions, delinquencies, and owner-occupied space.
- Assuming the current use guarantees your intended use is zoned, permitted, and physically practical.
- Skipping a Phase I environmental review on properties with any prior industrial, automotive, or dry-cleaning use.
- Treating a fully leased property as low-risk without reading each lease for term, renewals, and landlord obligations.
- Waiting until after contract to talk to a commercial lender about DSCR, reserves, recourse, and CapEx funding.
- Buying with no defined exit strategy — assuming a future buyer will accept a lower cap rate than you did.
When to ask for help
- You want a written read on a specific San Antonio commercial property — including which financial assumptions, leases, and physical risks deserve the most scrutiny before you offer.
- You need help sizing a realistic post-sale property-tax bill, insurance quote, or capital-improvement budget on a Texas commercial deal.
- You want introductions to commercial lenders, environmental consultants, engineers, or insurance brokers to run due diligence in parallel.
FAQs
Frequently asked questions.
How long should commercial due diligence take in San Antonio?
Typical inspection and feasibility periods run 30 to 60 days depending on property type, lender requirements, and environmental scope. Complex value-add, environmental, or entitlement issues can extend it. Build enough time into the contract to complete Phase I, inspections, appraisal, lease review, and lender underwriting without rushing.
Do I always need a Phase I Environmental Site Assessment?
Most commercial lenders require a Phase I on investment properties, and prior gas station, dry-cleaner, automotive, or manufacturing uses raise the risk of a required Phase II. Even without a lender requirement, a Phase I protects you from taking title to a contamination liability that can exceed the value of the property.
Will my property taxes really go up after I close?
Bexar County typically reassesses commercial property after a sale, and the seller's current tax bill often reflects a lower assessed value than your purchase price. Underwriting a realistic post-sale tax bill — not the seller's bill — protects your NOI, DSCR, and cash flow.
Should I talk to a commercial lender before making an offer?
Yes. Commercial lenders evaluate cash flow, property type, vacancy, DSCR, borrower liquidity, and experience. Confirming down payment, LTV, DSCR, reserves, and whether renovation costs can be financed before signing prevents surprises after the property is under contract.