# The Short-Term Rental Due Diligence Checklist: 12 Things to Verify Before You Buy > Skip one of these and you could buy a property that never cash-flows. Here is the complete STR due diligence checklist every investor should run before closing. Canonical: https://www.underwriteapp.com/blog/short-term-rental-due-diligence-checklist Short-term rental due diligence is not the same as standard real estate due diligence. The checklist your buyer's agent hands you was built for primary residences and long-term rentals. It will not catch the things that kill STR deals. An STR that gets banned by local ordinance, restricted by its HOA, or caught in a regulatory crackdown can go from cash-flowing to cash-burning overnight. These are not edge cases — they happen regularly in markets that were STR-friendly just two years ago. This checklist covers all twelve due diligence items that matter specifically for short-term rentals, grouped into four categories: market, property, regulations, and financials. Run every item before you close. --- ## Market Due Diligence ### 1. Verify occupancy trends — not just today's snapshot Occupancy data has a shelf life. A market that ran 75% occupancy in 2024 may be at 60% today because three new condo complexes entered the market as STRs. Before you buy, pull 12–24 months of historical occupancy data, not a single trailing quarter. What you want to see: stable or improving occupancy over multiple years. What is a red flag: occupancy that peaked 18–24 months ago and has declined steadily. That is a supply absorption problem, and it often takes years to correct. Tools to use: AirDNA Market Minder, Rabbu, or Underwrite's built-in comp layer. ### 2. Understand seasonality in your specific submarket "Lake house" and "ski cabin" are categories that can be deceiving. A ski property may run 90% occupancy December through March and 15% in June. If your debt service is $4,500/month, the off-season months will consume your reserves fast. Map out the seasonal revenue curve before you buy. Make sure your cash reserves and break-even math account for the shoulder and dead months. If you need to average $5,800/month to cover costs, but four months deliver $1,200 each, the annual math only works if the peak months are reliable. ### 3. Measure competition density How many active STR listings are competing for the same guest pool? Pull a search on Airbnb for your property type (beds, amenities, location radius) and count actives. Then note the review volume on your top 10 comps — a listing with 300+ reviews has a structural advantage over a new listing you will be operating in year one. High competition density is not automatically disqualifying, but your year-one revenue will be lower than the market average while you build reviews. ### 4. Check average nightly rates at the micro level Market-average ADR figures are useful for context. For underwriting purposes, they are close to useless. A 3-bedroom lake cabin commands different rates than a 3-bedroom suburban house in the same county, even if both show up in the same market report. Pull 5–10 comps that match your specific property: same bedroom count, similar amenity profile, similar location within the submarket. Use those comp rates — not the market-average number — to build your revenue projection. --- ## Property Due Diligence ### 5. Review HOA rules before you spend money on inspection This item comes before property inspection because it is a hard stop. If an HOA prohibits short-term rentals and you buy the property anyway, you have no legal STR. Many HOA bans include enforcement mechanisms with real teeth: fines, liens, and in some cases, legal action. Request the full HOA governing documents — CC&Rs, bylaws, and any amendments — and read them. Do not ask the seller or listing agent whether short-term rentals are allowed. Read the documents yourself or have your attorney read them. ### 6. Confirm zoning classification and permitted uses Zoning and HOA are separate issues. A property can be HOA-clear but zoned in a way that makes STR operation legally ambiguous. In some municipalities, residential zoning explicitly limits rentals to stays of 30+ days. In others, STRs are permitted by right; in others, they require a conditional use permit. Contact the local planning or zoning department directly. Ask: "Is a short-term rental (less than 30 days) a permitted use at this property?" Get the answer in writing if possible. ### 7. Inspect for STR-specific physical issues A standard home inspection will catch structural, mechanical, and safety issues. It will not tell you whether this property functions well as a rental. Items to add to your inspection scope: - Parking: Can you accommodate 2–4 cars? Parking complaints are the fastest way to lose your permit. - Noise insulation: Wall and floor insulation between units matters enormously if this is a condo or attached home. - Outdoor amenities: Pool, hot tub, deck, fire pit — all high-value for STR pricing, all carry maintenance and liability costs. Inspect these carefully. - Septic capacity: Rural properties with septic systems have occupancy limits. Verify the system is sized for your intended guest capacity. - HVAC redundancy: STR guests are less tolerant than long-term tenants. A failed HVAC in July creates negative reviews that live on your listing permanently. --- ## Regulatory Due Diligence ### 8. Verify local STR permit requirements Many cities and counties require an STR operating permit. These range from simple (pay $150, register your address) to complex (health and safety inspection, neighborhood notification, capacity limits). Some have caps on the total number of permits issued. Find out what permit is required, whether permits are currently available, and what the renewal requirements are. A permit that is available today may not be renewable if local politics shift. ### 9. Assess short-term rental ban risk This is the most important regulatory question and the hardest to answer definitively. The right question is not "is STR legal here today?" — it is "how likely is it to remain legal for the next 5–7 years?" Signals that indicate higher ban risk: - Active city council proposals to restrict or ban STRs - Hotel and housing advocacy groups that have been vocal in local media - Recent ballot initiatives or moratoriums in adjacent cities - Markets that have already restricted STRs and are tightening further (many coastal California cities, mountain resort towns) Check local news, city council meeting minutes, and planning department agendas. If you find active regulatory pressure, price in the possibility that you may need to pivot to a 30-day minimum lease model. --- ## Financial Due Diligence ### 10. Model DSCR at multiple occupancy levels Debt Service Coverage Ratio (DSCR) = Net Operating Income ÷ Annual Debt Service. Most DSCR lenders require 1.0–1.25 minimum. But passing at your base-case occupancy projection is not the real test. Run your DSCR at three occupancy levels: - Base case: your projected occupancy based on comp analysis - Stress case: 15 percentage points below base - Downside case: 30 percentage points below base (or a full off-season scenario) If your DSCR drops below 1.0 at the stress case, the deal is fragile. Make sure you have the cash reserves to survive a bad quarter without missing debt service. ### 11. Calculate break-even occupancy Break-even occupancy is the minimum occupancy rate at which your revenue covers all operating expenses and debt service. Break-even occupancy = (Total Annual Expenses + Debt Service) ÷ (ADR × 365) If break-even is 55% and your market runs 70% in a normal year, you have 15 points of cushion. If break-even is 65% and your market runs 70%, you have almost no margin. A slow season, a bad review month, or a minor regulatory change eliminates your cash flow entirely. ### 12. Build a real furnishing and startup budget New STR investors consistently underestimate furnishing costs. A properly furnished 3-bedroom STR — furniture, linens, kitchen equipment, outdoor furniture, small appliances, decor — typically runs $15,000–$30,000. Larger properties or premium markets run higher. This capital is consumed immediately (before you generate your first dollar of revenue) and it needs to be replaced on a 3–5 year cycle. Include a furnishing reserve of 5–8% of gross revenue in your ongoing expense model. Also budget for professional photography ($200–$600), platform setup time, and initial supplies. --- ## Red Flags That Should Kill a Deal These are automatic stops regardless of how attractive the numbers look: - HOA prohibition on short-term rentals with active enforcement - Zoning that explicitly prohibits stays under 30 days - Active city council proposal to ban or severely restrict STRs in the next 12 months - DSCR below 1.0 at base-case occupancy - No available STR permit with a capped permit program - Break-even occupancy within 5 points of the market's historical average (no cushion for a down year) --- ## Run the Numbers Before You Make an Offer Due diligence on the market, property, and regulations can be done in a weekend. The financial modeling takes longer if you do it manually. Underwrite runs the full STR financial analysis automatically — comp-based revenue projections, expense modeling, DSCR, cash-on-cash, and sensitivity scenarios — from a property address. It takes about 15 minutes and gives you a complete underwriting package, including a lender-ready PDF. **[Analyze your next deal free at underwrite.so](/signup).** No credit card required.