Cost Segregation by Property Type: What Actually Changes

Why property type is the biggest variable

Every cost segregation study runs the same underlying process: identify components that qualify for a faster depreciation schedule, carpet, most flooring, decorative lighting, cabinetry, appliances, window treatments, and certain electrical or plumbing serving specific equipment (5-year); certain fixtures and furniture (7-year); paving, fencing, landscaping, site utilities, and outdoor lighting (15-year land improvements). Everything else stays on the building's structural schedule, 39 years for commercial property, 27.5 years for residential rental. A structural roof and a building's central HVAC are part of that structural shell too, not 5-year property, a distinction worth remembering regardless of what kind of building you own.

What changes building to building is how much of the total basis falls into those faster buckets. A property typically shifts about 15 to 35% of its building basis into faster schedules, and that range moves with what the building actually contains. A restaurant with a commercial kitchen carries far more reclassifiable equipment per square foot than a plain warehouse shell. That difference is the entire reason a property-type-specific benchmark is more useful than a single average across every building type, and it is why this page exists as a hub instead of folding property type into a single generic explainer.

It is also why two owners comparing notes about their own studies, one on a warehouse, one on a restaurant, can walk away with wildly different ratios and both be right. The mechanics did not change between their two buildings. The buildings did. "Property type" is a useful shorthand, not a rigid category. A restaurant with an unusually small kitchen and a large dining room reclassifies differently than a ghost kitchen with almost no dining space at all, even though both fall under the same broad label.

Four real studies, side by side

These are real quoted engineered studies, not projections, each showing building basis (with land value already excluded, since land never depreciates), the first-year deduction the study produced (a section 481(a) look-back catch-up plus year-one increased depreciation, where applicable), the fee charged, and the ratio between deduction and fee.

Notice the medical clinic sits at the low end of this group, 24.2 to 1, still comfortably above Basis's 20x guarantee floor for commercial property, but the lowest of these four samples. That is not a knock on medical buildings, it is a reminder that even within "complex commercial property," the specific mix of equipment and finishes moves the number. The restaurant, by contrast, sits highest at 66.6 to 1, because a commercial kitchen packs an unusual density of 5- and 7-year equipment into a relatively compact footprint. The mid-rise office lands between the two extremes at 39.9 to 1, driven mostly by interior finishes and common-area electrical across multiple floors rather than any single dominant component category. See the full breakdown on cost segregation for restaurants and cost segregation for medical and dental offices.

Reading the four rows side by side is more useful than reading any one in isolation. The spread between 24.2 and 66.6 is the honest range real commercial buildings produce, and it is a better expectation to walk in with than a single average that flattens the difference between a restaurant kitchen and a medical waiting room.

What typically reclassifies, by property type

The components differ by building. Here is a general profile of what tends to show up in the faster-depreciation buckets across common property types. Actual results vary by building; this is a starting orientation, not a promise for any specific property.

Every one of these buckets follows the same rule: it is bonus-depreciation-eligible in year one, while the 39-year or 27.5-year structural shell is not. That single rule is the reason the table above matters more than it might first appear. Two buildings with identical purchase prices can produce very different first-year deductions purely because one has a denser mix of reclassifiable components than the other. See cost segregation for warehouse and industrial buildings and cost segregation for office buildings for the full property-specific breakdowns.

What never changes, no matter the property type

A few things hold regardless of building type. Depreciation reclassification has been settled law since the IRS lost Hospital Corporation of America v. Commissioner (109 T.C. 21, 1997), and the IRS's own Audit Techniques Guide (Pub 5653) describes how a proper study is done, meaning a study follows the IRS's own playbook rather than exploiting a loophole. Bonus depreciation under section 168(k) is 100% and permanent for qualified property acquired after January 19, 2025 under the 2025 OBBBA law; property acquired between 2023 and that date sits on the older phase-down schedule, 80%, 60%, or 40% depending on the acquisition year. And a study on a property owned for years, any property type, is claimed through Form 3115 with a section 481(a) catch-up, no amended returns required, regardless of whether the building is a restaurant or a warehouse.

Land value is always excluded first, in every property type; only the building and its improvements depreciate. That is true whether the property is a restaurant, a hotel, or a single-family rental. Nonresidential property types also carry access to section 179 qualified real property, letting roofs, HVAC, fire protection and alarm systems, and security systems placed in service after a building's original placed-in-service date be expensed subject to annual and business-income limits, a mechanic that does not extend to residential rentals.

Partial asset disposition (Treas. Reg. 1.168(i)-8) works the same way across every property type as well: when an old component is replaced, a roof, an HVAC unit, a section of flooring, the remaining basis of the OLD component can potentially be written off, but only in the tax year of the replacement. That mechanic shows up most often on properties old enough to have gone through at least one major component replacement, regardless of whether the building is a restaurant, a warehouse, or a hotel.

Commercial property types versus short-term rental

One structural difference does track property type: whether the building is a commercial asset or a short-term rental. Commercial properties, restaurants, medical offices, warehouses, retail, and hotels among them, typically go through a full site review or a detailed photo and drawing review as part of the engineered process. Short-term rentals and residential properties skip that step; the Airbnb or VRBO listing photos an owner already has feed the component classification directly, no site visit and no owner homework.

STR owners also carry a separate set of tax questions that commercial owners generally do not: whether the property's average guest stay is 7 days or less (the threshold under the short-term rental exception, Reg. 1.469-1T(e)(3)(ii)), and whether the owner materially participates, tested most commonly through 500 or more hours, substantially all the participation in the activity, or 100-plus hours combined with more participation than any other individual, including cleaners, co-hosts, or a property manager. Those tests determine whether rental losses can offset other income; they run independently of the cost segregation study itself, which measures the building's components rather than the owner's tax status or hours logged.

That distinction matters because it is common to conflate the two. A property can produce a strong cost segregation ratio and still have its losses trapped as passive if the owner does not clear the material participation test. The building's components and the owner's tax posture are two separate questions, answered by two separate sets of facts.

Multifamily, self-storage, and the properties in between

Not every property type sits cleanly at one extreme or the other. Small multifamily buildings tend to fall closer to a standard residential rental profile, unit-level flooring, appliances, and cabinetry driving most of the reclassification, with common-area site work adding to the 15-year bucket. Self-storage facilities run leaner still: minimal interior finish across most unit types, with the reclassifiable share concentrated in site lighting, fencing, gate systems, and paving rather than anything inside the storage units themselves. Hotels and motels sit closer to the restaurant end of the spectrum than to the warehouse end, since guest rooms carry dense furnishings, decorative lighting, and flooring across every unit, and shared amenities like pools and fitness areas add further site and fixture work. Auto repair shops and car washes fall somewhere in between, with specialized equipment mounts, drainage systems, and bay-specific electrical driving the 5- and 7-year buckets, alongside significant site paving for vehicle circulation. Daycare centers, meanwhile, often carry more interior finish density than their square footage suggests, given the flooring, fixtures, and safety-related electrical and plumbing built into a space designed around small children. See cost segregation for small multifamily and cost segregation for self-storage for the details on each. See cost segregation for hotels, cost segregation for auto repair shops, cost segregation for car washes, and cost segregation for daycare centers for property-specific detail on each.

Finding your property type's number

General ranges are a starting point, not a substitute for your building's actual number. The tables above are a map, not a quote. They tell you roughly where your property type tends to sit and why, so the number an estimate eventually produces makes sense in context rather than arriving as a surprise in either direction. A free Preliminary Benefit Estimate at /qualify models the likely first-year acceleration for your specific property, using its actual type, size, and details, in about 60 seconds and with no commitment. Every study, of any property type, carries the same floor: at least 20 times the fee in first-year deductions on commercial property, or at least 30 times on a short-term rental, or the study is free.

Every guide in this series

Frequently asked questions

Which property types reclassify the most basis?

Properties with dense equipment and finishes relative to their size, restaurants especially, tend to run at the high end of the 15 to 35% reclassification range. A real quoted restaurant study reclassified enough basis to produce $599,678 in first-year deductions on a $2,804,440 building.

Do simple property types still benefit from a cost segregation study?

Yes. Even a simple office or warehouse shell typically clears Basis's 20x guarantee floor, as shown in the Office/Warehouse benchmark at 33.4 times its fee, well above simple break-even for the property owner.

Is the process different for a hotel versus a single rental home?

Yes, in scope. Commercial properties like hotels typically involve a site review or detailed photo and drawing review. Short-term rentals and residential properties skip that step entirely, working from the owner's existing listing photos.

Does property type affect the guarantee?

No. Every study, regardless of property type, carries the same floor: at least 20 times the fee in first-year deductions on commercial property, or at least 30 times on a short-term rental, or the study is free.

Why did the medical clinic benchmark run lower than the others?

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