Why a Due Diligence Checklist Matters
Missing a single item during commercial real estate due diligence can cost millions. An overlooked environmental issue, an unnoticed tenant default risk, or a missed lease provision can transform a profitable acquisition into a liability.
A structured due diligence checklist ensures that every critical area is examined systematically. It prevents the common failure mode in CRE acquisitions: relying on memory, experience, or ad hoc processes rather than a comprehensive, repeatable framework.
This checklist covers the six core categories of commercial real estate due diligence. Use it as your master reference for every acquisition — from single-asset deals to portfolio transactions.
Financial Due Diligence
Financial due diligence verifies the property’s income, expenses, and investment viability. This is where most acquisition decisions are ultimately made or broken.
Income Verification
- Rent roll — Current rent roll with tenant names, suite numbers, SF, lease dates, base rent, and escalations
- Rent roll vs. lease comparison — Verify rent roll figures match actual lease terms
- Gross potential rent — Calculate total rental income at full occupancy and market rates
- Vacancy and credit loss — Current vacancy rate and historical collection loss
- Other income — Parking, storage, antenna, signage, late fees, and other miscellaneous income
- Percentage rent — Verify breakpoints and tenant sales reporting (retail properties)
- Straight-line rent adjustments — Calculate GAAP straight-line rent for financial reporting
Operating Expenses
- Trailing 12-month (T-12) operating statements — Obtain and review the most recent T-12
- Multi-year operating statements — Collect 3–5 years of operating history for trend analysis
- Expense reconciliations — CAM, tax, and insurance reconciliation statements
- Real estate tax bills — Current and historical tax bills; check for pending reassessment
- Insurance policies and premiums — Current coverage, claims history, premium trends
- Utility costs — Verify utility expense allocation and any submetering
- Management fees — Current management contract terms and fee structure
- Capital expenditure history — CapEx spending over the past 3–5 years
Underwriting Analysis
- Cap rate analysis — Calculate going-in cap rate based on verified NOI
- NOI reconciliation — Reconcile seller’s NOI with your independently verified figures
- Debt service coverage — Calculate DSCR based on proposed financing terms
- Cash-on-cash return — Project year-one returns based on equity investment
- IRR projections — Model internal rate of return over hold period
- Sensitivity analysis — Stress-test assumptions for vacancy, rent growth, and expense escalation
- Comparable sales — Recent comparable transactions for valuation benchmarking
Lease Due Diligence
Lease due diligence is the foundation of understanding any income-producing commercial property. Every tenant relationship, every dollar of revenue, and every obligation is defined in the lease documents.
Lease Document Collection
- All executed leases — Collect original leases for every tenant
- All amendments — Every amendment, modification, and extension in chronological order
- Side letters — Any supplemental agreements outside the primary lease
- Guaranty agreements — Personal or corporate guarantees
- Commencement date agreements — Confirmed commencement and rent start dates
- Estoppel certificates — Request and review tenant estoppels (see estoppel certificate guide)
- SNDAs — Subordination, non-disturbance, and attornment agreements
Lease Abstract Review
- Lease abstracts for all tenants — Completed abstracts covering all material terms (see our lease abstract template)
- Rent schedules — Base rent, escalations, free rent, percentage rent for each tenant
- Lease expiration schedule — Rollover profile by year showing SF and revenue at risk
- Renewal options — Track all renewal options, notice deadlines, and rent reset mechanisms
- Termination rights — Identify any kick-out clauses, co-tenancy termination rights, or go-dark provisions
- Expansion options — ROFR, ROFO, and expansion option commitments
- Assignment and subletting provisions — Restrictions and consent requirements
- Exclusive use clauses — Exclusivity provisions that restrict future leasing
- Operating expense recovery — Verify NNN, base year, or modified gross structures for each tenant
Critical Date Analysis
- Near-term expirations — Leases expiring within 12–24 months
- Option exercise deadlines — Upcoming notice periods for renewal, termination, or expansion
- Free rent burn-off dates — When abatement periods end
- Rent escalation dates — Upcoming bumps and reset dates
Legal Due Diligence
Legal due diligence protects against title defects, regulatory violations, and undisclosed liabilities.
Title and Survey
- Title commitment — Review the title commitment for exceptions, encumbrances, and requirements
- Title exceptions — Examine each exception (easements, restrictions, encroachments) for material impact
- Survey — Obtain or update ALTA/NSPS survey; compare to title exceptions
- Encroachments — Identify any encroachments onto or from the property
- Access and easements — Confirm legal access to public roads; review utility and access easements
- Deed restrictions — Review any use restrictions, CC&Rs, or development limitations
Zoning and Entitlements
- Zoning confirmation — Verify current zoning designation and permitted uses
- Non-conforming use — Determine if any existing uses are legally non-conforming
- Zoning compliance letter — Obtain from municipality if available
- Conditional use permits — Review any CUPs, variances, or special exceptions
- Building permits — Verify permits for all improvements and tenant build-outs
- Certificate of occupancy — Confirm current CO for the building and each tenant space
- Future development restrictions — Identify any overlay districts, historic designations, or pending zoning changes
Litigation and Liens
- Pending litigation — Search for any lawsuits involving the property or owner entity
- Mechanic’s liens — Check for any contractor or vendor liens
- Tax liens — Verify no delinquent tax obligations
- UCC filings — Review any personal property security interests
- Judgments — Search for judgments against the property owner
- Regulatory violations — Check for any open code violations or compliance orders
Contracts and Agreements
- Service contracts — Review all property management, maintenance, and vendor contracts
- Ground lease — If applicable, review ground lease terms, rent, and expiration
- HOA/POA agreements — Homeowner or property owner association documents and assessments
- License agreements — Antenna, signage, or other license agreements affecting the property
- Commission agreements — Outstanding leasing commission obligations
Physical Due Diligence
Physical due diligence assesses the building’s condition, identifies deferred maintenance, and estimates future capital needs.
Environmental
- Phase I ESA — Environmental Site Assessment per ASTM E1527-21
- Phase II ESA — If Phase I identifies RECs, conduct soil and groundwater testing
- Asbestos survey — Asbestos-containing material inspection report
- Lead-based paint — Testing for pre-1978 buildings
- Mold assessment — Indoor air quality and mold inspection
- Radon testing — Especially for ground-floor or basement spaces
- Underground storage tanks — UST records and removal documentation
- Environmental compliance — Verify compliance with federal, state, and local environmental regulations
- Flood zone determination — FEMA flood zone classification and insurance requirements
Building Condition
- Property Condition Assessment (PCA) — Comprehensive PCA per ASTM E2018
- Roof inspection — Age, condition, remaining useful life, warranty status
- HVAC assessment — Age, capacity, condition, maintenance records for all units
- Electrical systems — Service capacity, panel condition, code compliance
- Plumbing — Piping material, condition, known issues
- Structural assessment — Foundation, framing, load-bearing elements
- Elevator inspection — Maintenance records, modernization needs, code compliance
- Fire protection — Sprinkler system, fire alarm, suppression — inspection records
- Parking structure — Concrete condition, waterproofing, joint sealant status
- ADA compliance — Accessibility assessment for common areas and tenant spaces
Capital Expenditure Planning
- CapEx reserve estimate — Immediate repairs and replacement reserve projections
- Deferred maintenance — Items requiring near-term attention (0–12 months)
- Replacement schedule — Major systems replacement timeline (roof, HVAC, elevators, parking)
- Tenant improvement needs — Anticipated TI costs for upcoming lease renewals or new leasing
- Energy efficiency opportunities — LED lighting, HVAC upgrades, building envelope improvements
For automated CapEx analysis, see how DDee.ai generates automated CapEx summaries.
Tenant Due Diligence
Tenant quality determines the durability of a property’s cash flow. This section goes beyond lease terms to assess whether tenants can actually pay rent.
Tenant Credit Analysis
- Financial statements — Request and review tenant financials (public or privately provided)
- Credit reports — Business credit reports for each material tenant
- Credit ratings — Moody’s, S&P, or Fitch ratings for rated tenants
- Default probability — Calculate or obtain tenant default probability scores
- Payment history — Obtain aging reports showing rent payment timeliness
- Security deposits and LOCs — Verify all security deposits and letters of credit on hand
Tenant Concentration and Risk
- Revenue concentration — Identify tenants representing >10% of gross revenue
- Industry concentration — Assess tenant mix by industry sector
- Tenant financial health trends — Revenue growth, profitability, and leverage trends
- Guarantor analysis — Assess financial strength of guarantors
- Bankruptcy risk — Flag any tenants with public financial distress indicators
- Tenant retention probability — Assess likelihood of renewal based on lease terms, market conditions, and tenant operations
For comprehensive tenant analysis, explore DDee.ai’s tenant credit scoring and credit analysis tools.
Market Due Diligence
Market analysis validates the property’s competitive position and growth potential.
Submarket Analysis
- Market rent comps — Current asking and effective rents for comparable properties
- Occupancy trends — Submarket occupancy rates and historical trends
- Absorption data — Net absorption trends in the submarket
- New supply pipeline — Properties under construction or planned that will compete
- Rent growth projections — Broker forecasts and historical rent growth trends
Comparable Analysis
- Sales comps — Recent comparable sales with cap rates, price per SF, and deal terms
- Lease comps — Recent comparable leases supporting underwriting assumptions
- Operating expense comps — Benchmark property expenses against comparable buildings
Location and Demographics
- Transportation access — Proximity to highways, transit, airports
- Employment drivers — Major employers and employment trends in the area
- Population and income trends — Demographic data supporting tenant demand
- Infrastructure projects — Planned public or private development that could impact the property
Free CRE Due Diligence Checklist PDF
Download the complete checklist as a printable PDF to use on your next acquisition. The PDF includes all checklist items organized by category with checkboxes, responsible party assignments, and status tracking columns.
Download the Free Due Diligence Checklist PDF →
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How DDee.ai Automates This Checklist
Manually working through this checklist takes weeks. DDee.ai automates the most time-consuming elements — delivering results in under one hour.
| Checklist Category | Manual Time | DDee.ai |
|---|---|---|
| Lease abstraction and analysis | 2–5 days | Automated |
| Financial statement review (T-12, operating statements) | 1–3 days | Automated |
| Tenant credit analysis and default probability | 1–2 days | Automated |
| Legal document screening | 1–2 days | Automated |
| Environmental review | Hours | Automated |
| Red flag identification | Ongoing | Automated with citations |
| CapEx summary | Hours | Automated |
| IC report preparation | 1–2 days | Automated |
DDee.ai does not replace physical inspections, surveys, or title work — but it automates the document-intensive analysis that consumes the majority of due diligence time.
For a full comparison of DD approaches, see our guide to the best commercial real estate due diligence software and the best AI due diligence platforms for CRE.
Frequently Asked Questions
What is a commercial real estate due diligence checklist?
A CRE due diligence checklist is a comprehensive list of items to investigate before acquiring a commercial property. It covers financial analysis, lease review, legal examination, physical inspection, tenant assessment, and market evaluation. Using a checklist ensures nothing is overlooked during the acquisition process.
How long does commercial real estate due diligence take?
Traditional due diligence typically takes 30–90 days depending on deal complexity. The document analysis portion — lease review, financial verification, tenant credit checks — often consumes 2–4 weeks. AI platforms like DDee.ai can compress the document analysis phase to under one hour.
What is the most important part of CRE due diligence?
Every category matters, but financial and lease due diligence are typically the most critical for acquisitions. If the rent roll does not reconcile with actual leases, or if tenant credit quality is weaker than assumed, the entire investment thesis may be invalid.
Who is responsible for due diligence in a CRE acquisition?
The buyer is primarily responsible, often supported by third-party consultants: attorneys (title and legal), engineers (PCA and environmental), and accountants or analysts (financial). AI platforms like DDee.ai can replace much of the analyst and consultant workload for document-intensive tasks.
What happens if you skip items on the due diligence checklist?
Missed items can lead to post-closing surprises: unexpected capital needs, tenant defaults, environmental remediation costs, title defects, or regulatory violations. The cost of thorough due diligence is always less than the cost of a problem discovered after closing.
How is due diligence different for different property types?
The core checklist applies across property types, but emphasis shifts. Retail properties require more focus on co-tenancy, percentage rent, and exclusive use provisions. Industrial properties emphasize environmental and structural assessments. Multifamily focuses on unit-level rent analysis and regulatory compliance. Office properties prioritize lease rollover exposure and tenant credit.
Can AI replace traditional due diligence?
AI accelerates and improves the document analysis components of due diligence — lease abstraction, financial review, tenant credit assessment, and red flag identification. Physical inspections, title examination, and legal opinions still require human professionals. DDee.ai automates what can be automated and provides structured data that supports the human judgment required for the rest.
Complete Your Due Diligence Faster
Stop spending weeks on document analysis. DDee.ai automates the most time-consuming elements of this checklist and delivers complete due diligence reports in under one hour.