Due Diligence

What Is Due Diligence?

Due diligence is the comprehensive investigation of a property before completing a purchase. It is your opportunity to verify every assumption in your deal analysis, uncover hidden problems, and confirm that the investment meets your criteria. The due diligence period, typically 10-30 days after going under contract, is when you conduct inspections, review documents, and perform the research needed to make an informed buy-or-walk decision.

Property Inspection

A professional property inspection is the foundation of due diligence. A qualified inspector examines the structure, roof, foundation, plumbing, electrical, HVAC, and major systems. For older properties or those with known issues, specialized inspections for foundation, sewer scope, mold, radon, or environmental hazards may be warranted. Never skip the inspection to save a few hundred dollars. The cost of discovering a $20,000 foundation problem after closing dwarfs the $400-600 inspection fee.

Title Search and Review

The title search examines the property's ownership history to identify any liens, encumbrances, easements, or title defects that could affect your ownership. Tax liens, mechanic's liens, judgment liens, and unresolved claims from previous owners can all cloud the title. Title insurance protects you against undiscovered defects, but reviewing the title search results yourself or with an attorney ensures you understand what you are buying.

Rent Roll and Financial Verification

For income-producing properties, verify the rent roll by reviewing actual leases, bank statements showing rent deposits, and tenant payment history. Sellers may inflate rents or omit problem tenants. Request at least 12 months of profit and loss statements and compare them against your own projections. Look for discrepancies between reported income and actual deposits, and between reported expenses and reasonable expectations for the property type and age.

Estoppel Certificates

An estoppel certificate is a signed document from each tenant confirming the terms of their lease, including rent amount, security deposit, lease expiration, and any special agreements. Estoppels protect you from discovering after closing that the seller made verbal concessions or side deals with tenants that differ from the written lease. Always require estoppel certificates for multi-family acquisitions.

Environmental and Regulatory Review

Depending on the property, environmental due diligence may include Phase I or Phase II environmental assessments to identify contamination. Zoning verification confirms the property's permitted uses. Building code compliance ensures there are no outstanding violations. Flood zone determination affects insurance requirements and costs. For commercial properties, ADA compliance should also be evaluated.

The Checklist Approach

Develop a standardized due diligence checklist and use it for every acquisition. A systematic approach ensures you never overlook a critical item under the pressure of a tight timeline. Your checklist should cover physical inspection, financial verification, legal and title review, insurance, environmental, zoning, and market analysis. As you complete more transactions, refine your checklist based on lessons learned. Due diligence is your last line of defense before committing capital, so treat it with the rigor it deserves.