A baseline inspection at the start of a triple net (NNN) lease documents the building’s condition before the tenant takes over its care. It gives the landlord a dated record for mid-term reviews and lease end. The NNN label alone does not say who pays for the roof or HVAC. The lease does, so map findings to lease clauses.
This article is general information, not legal advice. Whether a condition breaches a lease is a question for your attorney.
What does “NNN” decide, and what does it leave open?
As we describe on our NNN service page, a triple net lease shifts maintenance, repair, and replacement duties to the tenant. That is the starting idea, not the full answer. The label does not say who pays for the roof, the structure, the parking surface, or HVAC replacement. The lease language settles those questions, so read the maintenance, repair, and replacement clauses before you plan the inspection.
Triple net structures show up in many property types. Our NNN work covers single-tenant net-lease buildings (retail quick-service restaurants, dollar stores, drugstore chains, dialysis, and industrial flex), multi-tenant strip retail, and industrial-park leases. Each lease structure typically carries different obligations, so the scope of an inspection follows the lease and the use.
When should a NNN property be inspected?
Three moments in a lease matter most. Each one answers a different question.
| Moment | The question it answers | What the inspection does |
|---|---|---|
| Lease commencement | What condition was the building in when the tenant took it over? | Sets a documented baseline before the tenant’s care, custody, and control period begins |
| Mid-term review | Is the tenant meeting its maintenance duties on schedule? | Tracks maintenance against the lease. Institutional investors often require this annually or every two years |
| Lease end or tenant departure | Is the building coming back in the condition the lease specifies? | Verifies condition and flags deferred maintenance before the tenant hands over the keys |
Inspections also support ownership transfers, where buyers examine tenant-maintained portfolios, lender-required portfolio reviews on net-lease loans, and disputed deferred-maintenance claims where independent documentation matters.
What should a baseline inspection record?
A baseline is only useful if it is specific, dated, and tied to the lease. A good one records:
- The building envelope, structural elements, and major systems, assessed against the lease’s maintenance and replacement standards.
- Tenant-installed improvements, documented and evaluated.
- Deferred maintenance and any lease non-compliance, flagged with photographic evidence.
- A capital reserve table when the scope calls for one. It is most useful at ownership transfers and refinances.
The date matters as much as the content. A report dated at lease start shows what existed on day one. A later report shows what changed. Without the first report, the second has nothing to compare against.
Is there a standard behind a “baseline” assessment?
Yes, for property condition work in general. ASTM E2018-24 is titled “Standard Guide for Property Condition Assessments: Baseline Property Condition Assessment Process.” ASTM describes its purpose as a framework for assessing the primary improvements at commercial real estate by performing a walk-through survey and conducting research. Its stated goal is to identify and communicate material physical deficiencies to a user. The scope includes document reviews, research, and interviews, and the resulting property condition report includes opinions of cost for suggested remedies of observed deficiencies.
E2018 is a guide for property condition assessments, not a lease-compliance test. Our NNN reports use an ASTM E2018-aligned method adapted to the tenant-bounded scope of an NNN engagement, which gives lenders and institutional investors a format they know. To see how a full PCA differs from other inspection types, read PCA vs. CBI and why a bigger PCA budget does not buy a better report.
How do findings map to lease clauses?
Findings help a landlord only if they connect to a clause. When an engagement includes lease review, we map findings to the specific maintenance, repair, and replacement clauses and produce an indexed report that supports legal and accounting review.
A practical way to prepare:
- Give the inspector the lease, including amendments, before the site visit.
- Ask which clauses cover the roof, structure, parking surface, building systems, and tenant improvements.
- Ask for each finding to cite the clause it relates to, or to be marked “lease silent.”
- Send the report to your attorney before you send a notice to the tenant.
What evidence holds up in a dispute?
Our NNN page notes that defensible third-party documentation matters in disputed deferred-maintenance claims. A report that is dated, photographed, and tied to specific clauses gives your attorney something concrete to work from. We write NNN reports for the landlord, with no tenant-side conflict of interest.
Keep the baseline and each later report together so the comparison is easy to follow. State law on lease-end claims differs, and this article does not cover it. Your attorney decides how a report is used in a claim.
How does a baseline connect to cost estimates?
If a lease-end inspection finds deferred maintenance, the next question is what it costs to fix. Our cost-to-cure reports turn observed deficiencies into opinions of probable cost, and our guide to cost-to-cure tables and opinions of probable costs explains how to read them.
Next step
Scope depends on property type, lease structure, and purpose. A lease-end check on one dialysis facility is a different job from an annual review of twenty strip retail properties, and both are within our scope. Read about our NNN lease inspections or request a proposal and attach the lease.
