Definition
Due diligence is the formal investigation period after a deal is under contract where the buyer verifies what they underwrote: income, expenses, unit mix, leases, physical condition, legal/title, and market assumptions. The goal is simple: confirm the property matches the story—or renegotiate or walk away if it doesn’t.
What Due Diligence Covers
1) Financial and Operational
- Rent roll verification: lease terms, actual rents, deposits, concessions, arrears.
- T-12 and trailing statements: normalize income/expenses, find non-recurring items.
- Utilities and recoveries: RUBS/bill-backs, submetering, contract rates, reimbursements.
- Payroll and staffing: on-site roles, turnover, benefits, contractor spend.
- Service contracts: termination rights, auto-renewals, above-market pricing.
- Insurance and taxes: current premiums, loss runs, reassessment risk.
2) Physical Condition
- Property Condition Assessment (PCA): roofs, HVAC, plumbing, electrical, exteriors, life safety.
- Unit walks: confirm interior condition, finishes, down-units, turn costs, scope consistency.
- Deferred maintenance: items “hidden†by occupancy or cosmetic work.
- Environmental screening: Phase I (and Phase II if triggered), mold/moisture concerns.
3) Legal, Title, and Compliance
- Title and survey: easements, encroachments, access, boundary issues.
- Zoning and permitting: legal nonconforming uses, permit history, open permits.
- Leases and tenant rights: addenda, renewal rights, rent caps, special terms.
- Litigation and claims: resident disputes, fair housing issues, vendor claims.
- HOA/CC&Rs (if applicable): restrictions, fees, pending assessments.
Why It Matters
Due diligence is where you protect capital. It reduces the chance you close on a property with undisclosed risks (bad debt, structural issues, un-terminable contracts, code problems) that permanently compress returns. It is also where you gain leverage: documented issues can support repricing, seller credits, or repairs before closing.
Investor Uses
- Confirm underwriting: ensure the deal still meets your return and risk standards.
- Build the 12–24 month plan: convert “business plan†into a sequenced scope and budget.
- Set realistic reserves: right-size CapEx, repairs, and operating reserves.
- Negotiate intelligently: use evidence-backed findings to adjust terms.
Example
You underwrite a 100-unit property assuming a T-12 economic vacancy of 6% and repairs/maintenance at $750/unit/year. During diligence you find:
- Delinquency/collections imply true economic vacancy closer to 10%.
- Deferred plumbing issues require a near-term spend of $250,000.
- Two vendor contracts are above market and auto-renew unless terminated within a 30-day window.
The diligence outcome might be: adjust NOI assumptions, increase reserves, terminate/renegotiate contracts, and request a seller credit or price reduction to keep returns within your underwriting standard.
Common Pitfalls
- Starting too late: scheduling inspections and document review late wastes the contingency window.
- Trusting summary reports: always reconcile rent roll, leases, and bank deposits.
- Missing “small†clauses: contract auto-renewals, termination fees, or assignment limits can be expensive.
- Ignoring taxes/insurance resets: reassessments and premium jumps can crush year-1 DSCR and cash flow.
- Not walking enough units: limited unit walks can hide systemic issues and understate turn costs.
- Overlooking compliance: life-safety, accessibility, or permitting issues can delay renovations and leasing.