Due Diligence Disaster: What Bad Leases Cost You in a Property Acquisition

You're acquiring a retail center. 15 tenants. $50M purchase price. The offering memorandum shows strong NOI and stable tenancy.

Then your attorney starts reading the leases.

The Co-Tenancy Time Bomb

The Finding: The grocery anchor has a co-tenancy provision. If two of the five named co-tenants cease operations, the anchor can reduce rent by 40% or terminate.

The Math:

• Anchor pays $500,000/year
• 40% reduction = $200,000/year lost revenue
• At 7% cap rate = $2.86M reduction in value

The Problem: One of the named co-tenants is struggling. Another has 18 months left on their lease. The "stable tenancy" has a structural risk embedded in it.

The Assignment Ambush

The Finding: The acquisition requires lender consent. The lease says landlord consent to assignment can be "withheld in landlord's sole discretion."

The Problem: This is a change-of-control situation. Does the sale trigger the assignment provision? Does the buyer need every tenant's consent? What if one tenant says no?

The Delay: Three months of lease review and tenant negotiations that wasn't in the closing timeline.

The Environmental Inheritance

The Finding: Industrial property. Former tenant operated a dry cleaner. Lease indemnification is limited to "contamination caused by tenant during the term."

The Problem: Contamination exists. Was it caused by this tenant, or the one before? Lease doesn't require baseline assessment. No way to prove allocation. New owner inherits cleanup liability.

The Cost: $1.2M remediation, entirely on the buyer.

The Expansion Option Surprise

The Finding: Largest tenant has an expansion option covering the adjacent 10,000 SF suite, currently occupied by the second-largest tenant paying above-market rent.

The Problem: If the anchor exercises the expansion option, the second tenant must relocate (at landlord's cost per their lease) or vacate. Either way, $400K in disruption costs not reflected in the pro forma.

Structural NOI Risk

• Co-tenancy provisions
• Exclusive use clauses that prevent desired tenant mix
• Rent reduction triggers
• Termination rights

Operational Risk

• Unclear expense pass-through methodology
• Ambiguous maintenance responsibilities
• Missing or inadequate insurance requirements
• Inconsistent calculation methods across tenants

Transaction Risk

• Assignment and change-of-control provisions
• SNDA requirements that need lender negotiation
• Estoppel obligations that may surface claims
• Options that affect property plans

Future Flexibility Risk

• Long-term options at below-market rates
• Expansion rights that limit leasing flexibility
• Restrictions on property modifications
• Use restrictions that limit redevelopment

Direct Valuation Adjustment

Bad lease provisions translate directly to reduced value:

Deal Friction Costs

Beyond valuation, bad leases create transaction costs:

• Extended due diligence timeline
• Legal fees for lease analysis
• Renegotiation with tenants
• Lender requirements for lease amendments
• Insurance or escrow for identified risks

If you're selling, lease quality affects:

Marketing Position

Clean leases with standard provisions signal professional management. Problem leases raise questions about what else wasn't managed well.

Buyer Pool

Sophisticated buyers with aggressive timelines skip properties with messy leases. Your buyer pool shrinks to those willing to do the work, and they'll want a discount.

Valuation

Every identified risk becomes a negotiating point. Even risks you think are manageable will be used to reduce price.

Timeline

Lease issues extend due diligence. Extended diligence means more time for markets to shift, financing to change, or the buyer to find reasons to renegotiate.

For Buyers

• Budget for comprehensive lease review (not just abstracts)
• Identify material provisions before LOI
• Build lease risk adjustment into valuation model
• Plan for tenant discussions during diligence

For Sellers

• Audit leases before marketing
• Address known issues proactively
• Prepare tenant estoppels early
• Create a lease summary that acknowledges, rather than hides, unusual provisions

Lease quality isn't just an operational issue. It's a transaction issue. The time to discover what's in your leases is before you're under LOI, whether you're buying or selling.