Cost Segregation for Medical and Dental Offices

The medical clinic benchmark, honestly presented

A real quoted engineered study on a medical clinic found a building basis (land value excluded) of $1,404,500, first-year deductions of $241,839, and a fee of $10,000, a ratio of 24.2 to 1. Compared against Basis's other three published commercial benchmarks, office/warehouse at 33.4 to 1, mid-rise office at 39.9 to 1, and restaurant at 66.6 to 1, this sample ran the lowest. That is worth saying plainly rather than burying it: medical buildings can vary more than the "complex commercial property" label suggests, and this particular study landed at the bottom of the range while still clearing the 20x guarantee floor by more than 4 to 1. See the full comparison on cost segregation by property type.

What drives the reclass in a medical or dental building

Medical and dental buildings carry a specific mix of components that push basis into faster schedules. Plumbing serving each individual operatory or exam room is a common driver, since a multi-chair dental practice or a multi-room medical clinic runs far more dedicated plumbing than a typical office. Medical gas lines, where present, and lead shielding around X-ray or imaging rooms are specialized enough to be separately identifiable. Exam-room and reception cabinetry, decorative lighting, and specialty flooring in clinical areas round out the 5- and 7-year classifications. Outside the building, parking lot paving, striping, and site lighting typically fall into the 15-year land improvement bucket.

None of that touches the structural shell. The building's walls, foundation, roof, and central HVAC stay on the 39-year commercial schedule, a distinction worth repeating for medical buildings specifically, since heavier-duty HVAC systems (common in clinical settings for air handling and infection control) are still structural property, not a 5-year asset, unless a component serves specific equipment separately from the building's core system. A single-story clinic and a multi-story medical office building can also differ in how much shared common-area electrical and plumbing gets classified, since a multi-story building often runs more extensive corridor and shared-space systems per square foot of leasable space.

Multi-tenant and single-practice buildings

A single-practice building, one dental office occupying its whole footprint, tends to have a more uniform component profile than a multi-tenant medical office building housing several practices. Multi-tenant buildings add tenant-specific electrical and finish-out work per suite, which a study needs to classify separately since each tenant's build-out may differ, one practice with imaging equipment and lead-lined walls, another with a simple exam-room layout and standard finishes. That variance is part of why a property-specific estimate matters more than a category-wide average for medical real estate. Ownership structure adds another wrinkle: a physician-owned building leased back to the practice runs through the same mechanics as any other commercial building, and the study proceeds independently of the entity structure holding title.

Purchase, build-out, or renovation

The mechanics apply whether the building was purchased with an existing medical build-out, constructed new for a practice, or renovated to add exam rooms or update equipment. A renovation opens the door to partial asset disposition (Treas. Reg. 1.168(i)-8): when an old component, dated flooring, an outdated HVAC unit serving a specific suite, is replaced, the remaining basis of that old component can potentially be written off, but only in the tax year of the replacement. See how section 179 treats roofs and HVAC on nonresidential property for a related mechanic that can apply alongside a renovation, since roofs and HVAC replacements after the building's original placed-in-service date may qualify for expensing under separate limits. A practice expanding its footprint, adding operatories or imaging space to an existing suite, is effectively creating new reclassifiable components at the same time it creates new square footage, and a study can capture both.

Why the lower ratio still clears the floor comfortably

A 24.2-to-1 ratio can sound modest next to a restaurant's 66.6 to 1, but the comparison that actually matters is against the guarantee, not against the highest sample in the group. Basis's floor for commercial property is 20 times the fee, and this benchmark cleared it by more than 4 to 1. A medical building does not need to match a restaurant's density to make a study worth doing; it needs to clear the floor, and this real example did so with real room to spare. Comparing your building against the guarantee, rather than against the highest number in someone else's published table, is the more useful way to judge whether a study is worth pursuing.

It also helps explain why an owner should not skip a study just because their building type is not the flashiest one on a benchmark page. The fee-to-deduction math still works, even on the lowest-performing sample Basis has published.

Getting your building's real number

The 24.2-to-1 example above is one real study, and it is honestly the lowest of Basis's published benchmarks, which is exactly why a property-specific estimate matters more than a category average. A free Preliminary Benefit Estimate at /qualify models the likely first-year acceleration for your specific medical or dental building in about 60 seconds, before any commitment. Every commercial study carries the same floor: at least 20 times the fee in first-year deductions, or the study is free.

Frequently asked questions

Why did the medical clinic benchmark run lower than a restaurant or office?

At 24.2 times its fee, this particular medical clinic sample was the lowest of Basis's four published commercial benchmarks, though still well above the 20x guarantee floor. Property type variance exists even within complex commercial buildings, not just between simple and complex ones.

Does a dental office with multiple chairs reclassify more than a single-chair practice?

Generally, more operatories mean more dedicated plumbing, electrical, and cabinetry serving each one, which tends to increase the reclassifiable share of basis. Actual results still depend on the specific building and its finish level.

Is a clinical-grade HVAC system a 5-year asset?

No. A building's central HVAC system, even a heavier-duty one built for infection control or air handling, stays on the 39-year commercial schedule unless a component serves specific equipment separately from the building's core system.

Can a multi-tenant medical office building use cost segregation?

Yes. A multi-tenant building typically requires classifying tenant-specific electrical and finish-out work per suite in addition to shared building components, since each practice's build-out can differ significantly from its neighbors.