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Two defined words are on the first pages. You have been using them as the same thing. Your pen hovers over the margin next to the two bolded terms, and you flip forward three pages to a clause about maintenance obligations you flagged last week. You already jotted a question in the margin there about who covers roof repairs after a recent hailstorm, and you’re starting to suspect the answer hinges on the difference between these two definitions.
Map each lease definition to corresponding physical spaces
Every commercial lease defines these terms differently, so you never want to rely on generic assumptions about what counts as the building vs the premises. Start by underlining every specific detail included in each definition, from square footage numbers to boundary lines to included features like restrooms, storage areas, or loading access. Illustrative example: Your lease might define the building as the 120,000 square foot, four-story structure at 123 Oak Street, including all attached walkways, mechanical rooms, roof systems, and surrounding paved parking lot, while the premises is the 8,200 square foot third-floor suite bounded by the east side of the third-floor elevator bank, the interior wall of the west stairwell, and the north and south exterior walls of the third floor, plus the two designated parking spots marked 3A and 3B in the lot. If any space you expect to use exclusively or share with other tenants is not explicitly named in one of the two definitions, mark that as a gap to address later. Many disputes over maintenance costs and access rights start when a space you assume is part of your premises is actually classified as part of the building’s common areas, or vice versa.
Cross-reference each term against maintenance obligation clauses
Now, go through every maintenance, repair, and capital improvement clause in the lease and circle every instance of either “building” or “premises” to tie each obligation to the correct defined term. For example, a clause that states you are responsible for all repairs to interior fixtures within the premises only applies to the space you occupy exclusively, so you do not have to cover the cost of fixing a light fixture in the shared first-floor lobby, even if that fixture is identical to the ones in your suite. If you find a clause that uses either term without referencing the definition section, or that uses the two terms interchangeably, flag that clause as ambiguous. You also want to check clauses related to property insurance, property tax pass-throughs, and common area maintenance fees, as these almost always tie costs to the building’s total square footage, not your individual premises square footage. This cross-reference step takes 15 to 20 minutes for most standard 20 to 30 page commercial leases, and it can save you thousands of dollars in unexpected fees over the length of your term.
Compare cost allocation for repairs tied to each term
Start by listing all the repair and maintenance clauses you flagged in the previous step, and map each to the correct term to confirm who is responsible for associated costs per your lease’s explicit terms. The following framework aligns with common lease structures to help you categorize each obligation:
| Clause Reference | Term Used | Allocated Cost Responsibility (per standard structure) | Common Scenario |
|---|---|---|---|
| Clause 4.2(a) | Premises | 100% Tenant | Replacing a broken interior LED light fixture in your suite’s private break room |
| Clause 4.2(b) | Building | Pro-rated by rentable square footage | Repairing a broken hydraulic line in the main elevator serving all four floors of the structure |
| Clause 4.3(a) | Premises | 100% Tenant | Patching drywall damage and repainting walls after your team reconfigures your office layout |
| Clause 4.3(b) | Building | 100% Landlord | Replacing 120 square feet of damaged roofing material after a severe spring hailstorm |
| Clause 4.4(a) | Premises | 100% Tenant | Servicing the mini-split HVAC unit that exclusively heats and cools your third-floor suite |
| Clause 4.4(b) | Building | Pro-rated by rentable square footage | Annual servicing of the main building HVAC system that supplies ventilation to all common areas |
As you go through your own lease clauses, adjust the allocated responsibility to match what your lease explicitly states, rather than relying on the common scenarios above. If you find a clause that assigns cost responsibility for a building element entirely to tenants, or that requires you to cover structural repairs that are normally tied to the building, mark that as a high-priority item to renegotiate if you are still in the lease negotiation phase, or clarify if you are already operating under an active lease.
Note gaps between defined terms and your expected use of the space
Now that you have a clear picture of what each term covers and how that ties to costs, list every discrepancy between the written definitions and how you plan to use the space for the length of your lease. For example, if your landlord verbally agreed you could install a 4-foot wide business sign on the front exterior of the building, but your premises definition only covers the interior third-floor space, you need to add explicit language to the premises definition or a separate use clause that grants you the right to install and maintain that sign, or confirm that you are permitted to make that alteration to the building with written landlord approval. If you rely on the small, unmarked storage closet down the hall from your suite to store excess inventory and office supplies, and that closet is not included in your premises definition or listed as an exclusive use right, you could lose access to that space if a new tenant moves in on your floor or the property is sold to a new owner. You can flag these gaps for your legal review using the annotation tools built into Lease Jacket if you’re digitizing your lease terms for easier tracking. Make sure every use right you agreed to verbally is reflected in the written definitions or related clauses, so you don’t face unexpected restrictions or fees later.
Pull up this page again when you draft your lease amendment request
The next time you open this sheet, you will be sitting down to draft a formal amendment request to send to your landlord or their property manager to clarify or adjust these definitions to match your agreed-upon terms. You will have all your margin notes, flagged clauses, and cost comparison table right here to reference, so you can make your request as specific as possible, rather than asking for a vague change to the definition section. For example, instead of writing “please clarify the difference between building and premises,” you can write “please add the third-floor storage closet located adjacent to the west stairwell to the definition of premises in Section 1.7, and adjust Clause 4.3(a) to reflect that the tenant is responsible for interior maintenance of that closet, while the landlord remains responsible for any structural repairs to the closet’s exterior walls that fall under building maintenance obligations per the existing lease terms.” Having this page open as you draft will help you make sure every requested change directly ties to the cost responsibilities and use rights you need for the full length of your lease term. You can also attach any photos you took of the storage closet, the roof damage, or the sign location you want to use as supporting documentation alongside your request, to make it even easier for your landlord to approve the changes without unnecessary back and forth. You avoid miscommunication when you tie every request to the explicit language of the lease you both signed, rather than referencing vague verbal agreements or generic industry standards.