Cost Segregation for Medical Office Buildings: Specialized Systems and Tenant Improvements

Medical office buildings reclassify meaningfully more than general office, typically 22% to 30% of depreciable basis compared with 15% to 22% for conventional office space. The difference is entirely in the specialized systems that clinical use requires.

There is also a structural planning point that applies to most of these properties: physicians commonly own the building through a separate LLC that leases to the practice. That arrangement changes who claims the depreciation and whether it is usable.

Clinical Systems That Reclassify

Medical gas systems, including oxygen, nitrous oxide, and medical air with their manifolds, distribution piping, and outlets, are equipment serving a specific function rather than general building service. Vacuum and suction systems are treated similarly.

Exam room plumbing is more extensive than general office plumbing. Sinks in every exam room, dedicated hand-wash stations, and eyewash stations carry dedicated supply and waste lines that are analyzed for functional connection to the clinical equipment they serve.

Electrical is where medical office diverges most. Dedicated circuits for imaging equipment, isolated power systems in procedure rooms, emergency power distribution serving specific clinical equipment, and nurse call systems all reclassify into five-year property under IRC Sec. 168(e)(3)(B).

Imaging suites add lead shielding. Lead-lined walls and doors serving an X-ray or imaging room are frequently treated as part of the equipment installation rather than as building structure, on the reasoning that the shielding exists solely to permit operation of the specific equipment.

Casework, Millwork, and Finishes

Medical offices contain substantial casework. Exam room cabinetry, nurse stations, reception millwork, and lab casework that is not structurally integrated fall into five-year and seven-year classes. Specialty flooring in procedure and lab areas, seamless sheet vinyl with welded seams and integral coved base, is generally analyzed as a finish rather than structure.

Waiting room and administrative area components follow the general office pattern: decorative lighting, window treatments, furniture, and removable partitions reclassify while structure does not.

Worked Example

A physician group acquires a 14,000 square foot medical office building for $4,900,000. Land is $700,000, leaving $4,200,000 depreciable. The study identifies five-year property of $672,000 (16%), seven-year property of $168,000 (4%), fifteen-year land improvements of $336,000 (8%), and 39-year structure of $3,024,000 (72%).

Reclassified basis of $1,176,000 is fully deductible in year one under IRC Sec. 168(k). Structure adds $77,538. Total first-year depreciation is approximately $1,253,538, against $107,692 straight-line.

The Self-Rental Trap

This is the issue that determines whether the deduction is worth anything to a physician owner.

When you own a building through an LLC and rent it to your own practice, the rental is a self-rental. Under Treasury Regulation Sec. 1.469-2(f)(6), net income from a self-rental where you materially participate in the operating business is recharacterized as non-passive. Critically, the recharacterization rule applies to income, not to losses. Net losses from the self-rental remain passive.

So a physician who runs a large depreciation loss through the building LLC generally cannot use it against practice income. The loss suspends under IRC Sec. 469 and carries forward.

There are planning responses. A grouping election under Treasury Regulation Sec. 1.469-4(d)(1) can treat the rental and the practice as a single activity where the ownership tests are met, which makes the depreciation available against practice income. That election requires care, must be disclosed, and has consequences on disposition, but for physician-owned real estate it is frequently the difference between a usable deduction and a suspended one.

Our guides on physician tax strategy and the passive activity loss rules cover the grouping analysis in more depth. Practices considering a purchase should run this analysis before closing, not after.

Tenant Improvement Allowances

Medical landlords frequently fund substantial tenant improvements. Who depreciates them depends on who owns them under the lease. If the landlord retains ownership, the landlord depreciates, often as qualified improvement property under IRC Sec. 168(e)(6) at 15 years with bonus eligibility. If the allowance is a payment to the tenant who owns the improvements, the treatment differs entirely. The lease language controls, and it should be reviewed before the improvements are placed in service rather than at tax time.

Frequently Asked Questions

Is lead shielding in an imaging room deductible as equipment?

It is frequently classified with the imaging equipment installation rather than as building structure, because the shielding exists solely to permit operation of that specific equipment. The position should be documented with the equipment specification requiring it.

Why does medical office reclassify more than regular office?

Clinical systems. Medical gas piping, vacuum systems, exam room plumbing, dedicated imaging circuits, isolated power, nurse call, and extensive casework have no counterpart in general office space. That typically adds seven to ten percentage points of reclassification.

I own my building through an LLC that rents to my practice. Can I use the depreciation?

Not automatically. Self-rental rules under Treas. Reg. Sec. 1.469-2(f)(6) recharacterize net income as non-passive but leave net losses passive, so the depreciation loss typically suspends. A grouping election under Treas. Reg. Sec. 1.469-4(d)(1) can solve this where the ownership tests are met.

Should the building be in the same entity as the practice?

Almost never, for liability and exit-planning reasons. The separation is correct. The tax consequence of separation is the self-rental loss issue, which is addressed through a grouping election rather than by combining the entities.

Who depreciates tenant improvements the landlord paid for?

Whoever owns the improvements under the lease. Landlord-owned improvements are depreciated by the landlord, often as 15-year qualified improvement property. If the allowance is treated as a payment to a tenant who owns the improvements, treatment differs. The lease language controls.

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