Commercial leases are among the most consequential legal documents a business owner will ever sign, yet the focus almost always lands on the obvious: rent, square footage, lease term. The paperwork surrounding those headline terms rarely gets the same scrutiny — and that gap is where expensive surprises hide. Zoning certificates, environmental disclosures, subordination clauses, and operating expense reconciliations can each reshape the economics of a space long after the ink dries. Understanding what to ask for before signing is not a formality. It is the difference between a lease that works and one that quietly erodes margin.
The Documents Behind the Deal That Never Get Requested
Most commercial tenants request the lease itself and perhaps a floor plan. What rarely makes the list: the certificate of occupancy, the landlord’s title commitment, and any existing environmental assessment on the property.
A certificate of occupancy confirms that the building is approved for the specific use a tenant intends. This matters more than it sounds. A space previously used as a warehouse may lack the HVAC capacity, egress requirements, or electrical load specifications for a retail or restaurant operation. Tenants who discover this after taking possession face either expensive retrofits or protracted negotiations with a landlord who has little incentive to help.
The landlord’s title commitment reveals whether the property carries encumbrances — easements, liens, or deed restrictions — that could limit how the space is used or require the tenant to vacate under certain conditions. A recorded easement granting a utility company access to part of the property might not appear anywhere in the lease itself.
Environmental assessments are particularly consequential for tenants in manufacturing, food service, or healthcare. If a prior tenant created contamination, disclosure obligations and cleanup liability can follow the property, not just the prior occupant.
- Request the current certificate of occupancy at least 30 days before the intended move-in date, and verify it matches the intended business use code.
- Ask for a copy of the existing Phase I environmental site assessment if the property has any history of industrial or chemical use.
- Cross-reference any disclosed easements against the actual square footage calculation in the lease to confirm no overlap.
Operating Expense Clauses and the Reconciliation Risk
Triple-net and modified gross leases are common in commercial real estate, but the operating expense definitions embedded in those structures vary enormously from lease to lease. What counts as a capital improvement versus a routine repair, how management fees are calculated, and whether administrative overhead is included in CAM charges are all negotiated terms — not standard ones.
The reconciliation process is where tenants most often encounter unbudgeted costs. Landlords estimate operating expenses at the start of each year and collect pro-rata contributions monthly. At year’s end, actual costs are tallied and the difference is billed or credited. A tenant occupying 3,000 square feet in a 30,000-square-foot building who underestimates their exposure by even 15% on a $200,000 annual operating expense pool faces an unexpected $3,000 reconciliation bill — before any disputes about what should have been included.
The more important question is whether the lease caps the tenant’s exposure to controllable expense increases. Many landlords will agree to a 3-5% annual cap on controllable CAM increases when asked directly, but this clause rarely appears in a first draft.
- Request the prior three years of operating expense reconciliation statements before signing, comparing estimated versus actual charges to identify patterns of underbilling followed by large true-ups.
- Confirm in writing which expense categories are excluded from CAM calculations — landlord administrative fees above 5% of total operating costs are often negotiable.
- Identify whether capital expenditures are amortized into CAM charges over the useful life of the improvement or billed in full during a single reconciliation year.
Assignment, Sublease, and Franchise Disclosure Documents
Tenants focused on their own occupancy frequently overlook the assignment and sublease provisions that govern what happens if their business model changes. A tenant who plans to grow through franchising, bring in a business partner, or eventually sell the business will find that many standard lease forms require landlord consent for any transfer — sometimes with a recapture right that allows the landlord to terminate the lease and deal directly with the incoming tenant.
Franchise operators face an additional layer. Before signing any commercial lease tied to a franchised business, the franchise disclosure document governs critical aspects of the arrangement, including approved locations, lease approval requirements, and the franchisor’s rights if the underlying franchise agreement terminates. A thorough FDD review conducted before committing to a specific location can reveal whether the franchisor’s site approval process conflicts with the landlord’s timeline or required lease terms — a conflict that can derail an entire deal if discovered too late.
Non-franchise tenants should focus on whether the assignment clause distinguishes between a transfer to an affiliate entity versus an outright sale of the business. Selling a company that happens to hold a lease is treated differently in different jurisdictions, and a poorly drafted clause can make a business sale far more complex than necessary.
- Review the assignment provision for any recapture language and ask for a carve-out for transfers to affiliates or in connection with a business sale involving at least 51% of ownership.
- Confirm the landlord’s consent standard — “not to be unreasonably withheld” is meaningfully different from “at landlord’s sole discretion.”
Subordination, Non-Disturbance, and Estoppel Agreements
Three documents that appear late in lease negotiations — often as exhibits — carry disproportionate long-term risk. Subordination, non-disturbance, and attornment agreements (commonly called SNDAs) determine what happens to a tenant’s rights if the landlord’s lender forecloses on the property. A subordination clause without a companion non-disturbance agreement means a tenant’s lease could be extinguished in a foreclosure even if the tenant has done nothing wrong.
Estoppel certificates are a related but separate concern. Landlords routinely ask tenants to sign estoppels — statements confirming the lease terms, the absence of defaults, and the current rent — when refinancing or selling a property. A tenant who signs one carelessly may inadvertently waive rights to a dispute they intended to preserve.
Neither document is inherently dangerous, but both require careful reading before execution. Tenants with any leverage at all should negotiate for a fully executed SNDA from the landlord’s existing lender before the lease commences — not after.
- Obtain and review any existing SNDA from the landlord’s current lender before the lease commencement date, confirming that the non-disturbance language is unconditional.
- Before signing any estoppel certificate, compare each stated fact against the original lease, all amendments, and any side letters to identify discrepancies.
Before the First Month’s Rent Is Due
The moment a tenant takes possession, the window to raise undisclosed issues narrows significantly. Gathering these documents before that point — not during negotiation, and certainly not after moving in — keeps options open. A landlord reluctant to produce environmental assessments, prior reconciliation statements, or a lender’s SNDA before signing is signaling something about the transaction. That reluctance is worth understanding. Reviewing overlooked paperwork is not about distrust; it is about making sure the space that looks right on a tour is also right on paper.
