At Centsable Inspections, we perform NNN lease inspections across Birmingham and the surrounding counties for tenants, buyers and landlords who want to know exactly what they are taking on before the ink dries. This guide explains, in plain English, what a triple net lease is, what an NNN lease inspection covers, and how the report can save you real money at the negotiating table.
What Is a Triple Net (NNN) Lease?
A triple net lease is a commercial lease where the tenant pays base rent plus the three "nets":
- Property taxes
- Building insurance
- Maintenance and repairs (often including common area maintenance, or CAM)
That third net is the one that catches small business owners off guard. Depending on how the lease is written, "maintenance and repairs" can include the roof, the rooftop HVAC units, plumbing, electrical, the parking lot, exterior walls and sometimes even structural components. Many NNN leases also make the tenant responsible for keeping the property in compliance with current codes and accessibility requirements.
Landlords like NNN leases because they create predictable income. Tenants accept them because the base rent is usually lower than a gross lease. The trade is simple: lower rent in exchange for taking on the building's operating risk.
Why the Tenant Carries the Repair Liability
In a residential lease, the landlord fixes the furnace. In a triple net lease, the tenant usually does, and the lease language is often broad: "Tenant shall maintain, repair and replace all building systems in good working order."
"Replace" is the key word. If the HVAC compressor fails in year two of a five-year lease, you may be buying the landlord a new unit that will outlast your tenancy by a decade. None of this is hidden; it is in the lease. But the condition of the equipment you are agreeing to maintain is not in the lease, and that is where a triple net lease inspection comes in.
What an NNN Lease Inspection Covers
A commercial property inspection for an NNN lease is built around one question: what is this building going to cost the tenant over the term of the lease? To answer it, we evaluate the visible and accessible condition of the systems that typically fall under tenant responsibility and note their approximate age and apparent remaining service life.
Roof
Type, age, drainage, flashing, ponding, membrane condition, prior repairs and active leaks. A roof near the end of its life is often the single largest exposure in an NNN lease.
HVAC
Each accessible unit documented by make, model, serial number and approximate age, plus operating condition, refrigerant type (older R-22 units are expensive to service) and visible deferred maintenance.
Structure and Foundation
Slab cracking, settlement, wall movement, framing condition and moisture intrusion. Structural items are sometimes carved out of tenant responsibility, but only if you know to ask.
Plumbing and Electrical
Supply and drain lines, water heaters, backflow devices and grease traps where applicable. Electrical service size, panel condition, wiring and whether the existing service will realistically support your business use. A restaurant needs far more than a boutique.
Parking Lot and Site
Pavement condition, drainage, striping, lighting, curbing and sidewalks. Parking lot resurfacing is routinely passed through to tenants under CAM.
Visible Accessibility Items
Accessible parking, route of travel, entrance clearances, restroom layout and signage as observed. This is not a formal ADA compliance survey, but visible accessibility shortfalls are worth flagging because they can become the tenant's problem the moment they take possession.
Deferred Maintenance
Everything the previous occupant or owner let slide. The lease usually says the tenant keeps the property in "good condition," which can mean bringing it up to that condition first.
Our inspections follow the Standards of Practice of the Certified Commercial Property Inspectors Association (CCPIA) and InterNACHI. Tim Thrasher, who leads Centsable Inspections, holds both the Certified Code Master Inspector (CCMI) and Certified Master Inspector (CMI) designations, which matters when the lease ties your obligations to current building code. The inspection is a condition assessment, not municipal code enforcement or an engineering evaluation; where a finding needs further evaluation, the report says so.
How an NNN Inspection Differs From a Home Inspection
A home inspection tells a buyer what is wrong with a house today. An NNN lease inspection tells a tenant what the building is likely to cost over the next five to ten years, and who should be paying for it. It focuses on remaining service life rather than a repair list, flags the code and accessibility items the lease may assign to you, and produces a dated baseline record. It is written to be handed to your attorney and used in the negotiation, not filed away.
How the Report Gives You Negotiation Leverage
This is where the inspection pays for itself. A documented, third-party assessment turns vague concerns into specific lease terms. Common outcomes include:
- Carve-outs. Excluding the roof, structure or specific HVAC units from tenant responsibility, or limiting the tenant to routine maintenance while the landlord covers replacement.
- Landlord-funded repairs before possession. Requiring the landlord to fix documented deficiencies, such as a leaking roof section or a failed compressor, before the lease commences.
- Capped CAM or capital expense clauses. Setting an annual ceiling on what the tenant pays toward major repairs, or requiring capital items to be amortized over their useful life rather than charged in one year.
- Documented baseline condition. A dated photo record of the property at move-in. When the lease ends and the landlord claims you damaged the parking lot or let the roof deteriorate, the baseline report settles the question.
An Illustrative Example: The 15-Year-Old Rooftop Unit
The following is a hypothetical example for illustration, not an actual client.
A small business owner is about to sign a five-year NNN lease on a 4,000-square-foot retail space in the Birmingham area. The lease makes the tenant responsible for maintaining and replacing all HVAC equipment and for the roof "above the premises."
A triple net lease inspection documents two rooftop units, both roughly 15 years old, using R-22 refrigerant, with rusted cabinets and one unit short-cycling. Typical service life for this equipment is 15 to 20 years. The modified bitumen roof shows ponding and patched seams and appears to be near the end of its serviceable life.
Rough exposure for the tenant over a five-year term:
- Replacement of two rooftop units: roughly $8,000 to $15,000 each, or $16,000 to $30,000 total
- Roof replacement over 4,000 square feet: roughly $20,000 to $40,000 depending on system and tear-off
- Potential exposure: $36,000 to $70,000 on a lease with base rent of perhaps $60,000 per year
With the report in hand, the tenant's attorney negotiates a clause that assigns HVAC replacement to the landlord, limits the tenant to routine HVAC service and filter changes, and excludes roof replacement entirely. The tenant signs with a known maximum exposure instead of an open-ended one.
Actual costs vary by building, equipment and market conditions. The point is not the precise number. It is that the tenant knew the number before signing rather than after the first failure.
When to Order an NNN Lease Inspection
Order the inspection during your due diligence period, before the lease is executed. Once the lease is signed, you have accepted the property in its current condition, and your leverage is gone.
- Tenants: After the letter of intent is accepted and before the lease is finalized. Most LOIs include an inspection window. If yours does not, ask for one.
- Buyers of NNN-leased property: During the purchase contingency period, so you know what the existing lease obligates the tenant to cover and what falls back on you as owner.
- Landlords: Before listing the space or at tenant turnover, to establish a baseline and avoid move-out disputes.
A tenant inspection before signing a lease typically takes a few hours on site, and commercial reports are delivered within 48 hours at the latest, well within a normal due diligence window.
What to Bring to Your Attorney
- The full inspection report with photos and system-by-system condition notes
- The equipment schedule (make, model, serial and age for each HVAC unit and major component)
- The list of deferred maintenance, active defects and any accessibility or code items
- The proposed lease, with the maintenance, repair, CAM and surrender clauses flagged
- Your list of what you want carved out, capped or repaired before possession
Your attorney handles the language. The inspection gives them the facts to work with.
Frequently Asked Questions
What is an NNN lease inspection?
An NNN lease inspection is a commercial property inspection focused on the building systems a tenant becomes responsible for under a triple net lease, including the roof, HVAC, structure, plumbing, electrical, parking and visible accessibility items. It documents current condition and remaining service life so the tenant can negotiate the lease with full knowledge of their maintenance liability.
Does the tenant really pay for roof and HVAC replacement in a triple net lease?
Often, yes. Many NNN leases assign repair and replacement of building systems to the tenant. The exact scope depends on the lease language, which is why the inspection and a lease review by your attorney go hand in hand.
How much does a triple net lease inspection cost in Birmingham, AL?
Pricing depends on building size, age, number of HVAC units and the scope requested. Call Centsable Inspections at 205-260-9997 for a quote. In most cases the fee is a small fraction of a single HVAC or roof repair.
Can a landlord use an NNN inspection too?
Yes. Landlords use the same report to document baseline condition at lease commencement, plan capital expenditures and reduce disputes at move-out.
Do I still need an inspection if the landlord says the building is in good shape?
The landlord's opinion is not a lease term. An independent inspection, performed to CCPIA and InterNACHI standards, gives you documentation you can negotiate with and a baseline you can rely on at move-out.
Know What You Are Signing
A triple net lease is not a bad deal. It is simply a deal where the tenant carries the building's risk. An NNN lease inspection tells you how much risk that is, in dollars and years, while you still have the leverage to do something about it.
If you are considering a commercial space in Birmingham or anywhere in central Alabama, call Centsable Inspections at 205-260-9997 to schedule a triple net lease inspection before you sign. Review the full scope on our NNN lease inspection page, see our commercial inspection services, or read our shorter NNN lease inspection guide for investors.
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