Due Diligence Failure Case Studies

An investor acquired a 30-unit apartment building for $3.2M based on a rent roll showing 93% occupancy and $1,150 average rent. After closing, the investor discovered that 8 units listed as occupied were actually vacant and had been for months—the seller had created fake leases and reported phantom income. Actual occupancy was 67%, not 93%. Actual revenue was $210,000, not $385,000. The property's value at actual performance was approximately $2.0M. Loss: approximately $1.2M. What went wrong: the buyer did not verify occupancy in person, did not request estoppel certificates, and did not reconcile the rent roll against bank deposits. Prevention: always verify physical occupancy, always collect estoppel certificates, and always reconcile rent roll revenue against bank deposit records.

An investor acquired a 1960-built, 16-unit building for $1.5M. The inspector noted minor cosmetic cracks but did not recommend a structural engineer. Within 6 months of closing, a unit on the ground floor developed a 2-inch crack in the foundation wall with water intrusion. Investigation revealed that the entire west wall of the building had shifted due to expansive clay soils and inadequate footings—a condition that had been developing for years but was masked by the seller's interior renovations. Structural remediation cost: $280,000 (helical piers, wall stabilization, waterproofing). The property was uninhabitable during 4 months of construction, costing an additional $50,000 in lost revenue and tenant relocation. Prevention: engage a structural engineer for any building over 30 years old, especially on expansive clay soils. Use thermal imaging to detect moisture behind walls. Check the building department for historical structural complaints.

An investor acquired a mixed-use building with 4 retail spaces and 8 apartments for $2.8M with plans to convert 2 underperforming retail units to apartments (adding $24,000/year in revenue). During permitting for the conversion, the city revealed that the residential units were legally non-conforming—the current zoning allows commercial use only, and the residential units were grandfathered under a 1985 variance. The variance conditions prohibited: increasing the number of residential units, expanding the residential square footage, and rebuilding residential use if the building suffered more than 50% casualty damage. The conversion was denied. Furthermore, the investor's insurance carrier increased premiums by $8,000/year upon learning of the non-conforming status, and the lender required an additional $50,000 escrow for potential rebuild restrictions. Prevention: obtain a zoning verification letter from the municipality before closing, verifying conforming status and any variance conditions. Confirm that planned improvements are permissible under current zoning.