Ask three lease administrators to abstract the same generic template against a shopping-center lease, a corporate office lease, and a medical office building lease, and you'll get three abstracts that all technically have every field filled in — and two of them will be missing the provisions that actually determine what the lease is worth. Property type doesn't just change the tenant mix. It changes which clauses carry the risk, and a one-size-fits-all abstraction template quietly skips them.
Here's what actually shifts across the three, and where the substance lives in each.
Retail: the rent structure isn't a single number
In a retail lease — particularly inside a shopping center — base rent is often only part of the story. Percentage rent adds a variable layer tied to tenant sales, with breakpoints that determine when it kicks in and how it steps over the term. Getting the breakpoint mechanics wrong doesn't just misstate one field; it produces a charge schedule that bills incorrectly from month one.
Retail leases also carry conditional structures that don't exist in most office leases at all:
- Co-tenancy clauses — remedies triggered when an anchor tenant closes or occupancy in the center drops below a threshold, split between opening conditions (whether the tenant has to open at all) and ongoing operating conditions.
- Kick-out clauses — a tenant's right to terminate early if sales fall below a defined threshold, usually inside a defined window with its own notice and cure requirements.
- Exclusive-use grants and radius restrictions — provisions that constrain what the landlord can lease to other tenants in the same center, and what the tenant itself can operate elsewhere nearby.
- CAM pools with caps, floors, and gross-up mechanics — often more complex than a straightforward office operating-expense clause, because retail CAM frequently has category-specific exclusions and compounding cap structures.
None of these show up in a generic abstract template built around a flat base rent and a single expense-recovery line. They're the reason retail is widely considered the hardest asset class to abstract accurately — we go deeper on the full mechanics in our dedicated retail lease abstraction breakdown.
Office: the build-out and expense split carries the risk
Office leases usually don't have percentage rent or co-tenancy provisions at all — the risk sits somewhere else. The two fields that matter most in an office abstract are the tenant-improvement responsibility split and the operating-expense structure.
Base building vs. tenant-improvement responsibility. Office leases typically define a base-building condition the landlord delivers, then split responsibility for the tenant's actual build-out — sometimes a landlord work letter that builds the space to the tenant's specifications, sometimes a cash allowance the tenant draws down against its own construction. An abstract that records only a lump-sum TI number and skips which model applies (and what happens to unused allowance) misses the operational reality of the buildout.
Operating expense structure. Office leases commonly use one of a few recognizable structures — a base-year expense stop, a fixed expense stop, or a triple-net pass-through — and each one produces a materially different tenant obligation from the same raw operating-expense number. Abstracting "tenant pays operating expenses" without capturing which structure applies and what the base year or stop amount is leaves the number impossible to reproduce later.
Office abstracts also carry their own measurement subtleties — rentable vs. usable square footage and the load factor that converts between them, which directly drive both rent and the tenant's pro-rata share of expenses — along with renewal and expansion options that are frequently tied to specific floors or contiguous space rather than a flat right to renew.
Medical office: build-out milestones and compliance-sensitive language
Medical office building (MOB) leases look like ordinary office leases on the surface, with two categories of provision layered on top that a generic — or even a standard office — template doesn't ask about.
TI allowances tied to build-out milestones, not a lump sum. Medical build-outs are staged — shell, rough-in, finish — and TI allowance disbursement in an MOB lease is frequently conditioned on hitting those milestones rather than paid as a single draw. An abstract that captures only the total allowance misreads the landlord's actual disbursement obligations for the life of the lease.
Permitted-use and exclusivity by specialty. MOB leases often name specific medical specialties in the permitted-use clause and grant exclusivity protecting one practice from a competing one in the same building — provisions with no real analog in a standard office lease, and ones that constrain both what the landlord can lease next and what an acquiring practice can expand into.
Compliance-sensitive language. Because MOB tenants are frequently healthcare providers, leases can include fair-market-value rent representations and other language tied to referral relationships between physicians and facilities. An abstract shouldn't render a legal opinion on any of this — but it should capture the language verbatim, cite the page, and flag it explicitly so counsel can review it before closing rather than discovering it after. Certificate-of-occupancy and use-permitting considerations for medical tenants deserve the same treatment: flagged for the right party to verify, not silently summarized away.
Change-of-control and assignment provisions matter more here too, since medical practices merge and get acquired by hospital systems at a higher rate than most office tenants — whether a transaction triggers landlord consent or a recapture right is exactly the kind of question a rushed abstract gets wrong. We cover the full MOB-specific field list in our medical office lease abstraction page.
The same abstraction discipline, different fields
None of this means each asset class needs an entirely separate abstraction process — parties, premises, term, key dates, and base rent are foundation fields everywhere. What changes is which additional fields carry the real risk, and a template that doesn't know the difference will fill in the foundation fields correctly and quietly drop everything else.
That's why abstraction quality depends on someone — or something — that knows retail percentage-rent mechanics are a different problem than office expense-stop structures, which is a different problem again from MOB build-out milestones and compliance flags. Pattern-matching a form template across all three gets you a document that looks complete and isn't.
Get the fields that matter for your property type
PropETL abstracts leases with AI-powered extraction — every value cited to its source page — followed by specialist human QA on every document, because these asset-class-specific clauses need judgment, not just pattern matching off a page. Send a representative lease from your portfolio, retail, office, or medical office, and reach out for a free sample round: one document in, one finished abstract back, so you can judge the field coverage before committing to a batch.