When you buy a rental property, the building itself is generally depreciated over 27.5 years for residential rental property or 39 years for nonresidential real estate.

But here’s what many real estate investors don't realize:

Not everything you purchased is necessarily a 27.5- or 39-year asset.

A cost segregation study identifies components of a property that may qualify for shorter depreciation periods—often 5, 7, or 15 years. Depending on current tax law and when the property is placed in service, some of those assets may also qualify for bonus depreciation.

The result can be significantly more depreciation in the early years of ownership.

Here are 10 parts of a rental property that investors frequently overlook.

1. Furniture

Did you purchase a furnished Airbnb, vacation rental, or other short-term rental?

Beds, couches, tables, chairs, desks, dressers, televisions, and other furniture may generally be classified separately from the building and depreciated over a much shorter period.

This can be especially important when purchasing a property where the furniture was included in the purchase price. A reasonable portion of the acquisition price may need to be allocated to the furniture and other personal property rather than simply assigning the entire purchase price to land and building.

2. Appliances

Refrigerators, washers, dryers, dishwashers, ranges, microwaves, and certain other appliances generally don't need to be depreciated over the same 27.5-year period as a residential rental building.

Individually, these items may not seem significant.

But in a fully furnished vacation rental, they can add up quickly.

3. Certain Flooring

Not all flooring necessarily receives the same tax treatment.

Certain removable floor coverings, such as carpeting, may qualify for shorter recovery periods than structural components of the building.

A cost segregation study looks beyond the simple label of "flooring" and evaluates the type of material, installation, and relationship to the building.

4. Landscaping

Here's one that surprises many property owners.

Certain landscaping and site improvements may qualify as 15-year property rather than being depreciated with the building.

Depending on the facts, this can include items such as landscaping associated with site improvements, shrubbery, trees, and other exterior improvements.

For properties with extensive outdoor spaces, these costs can become meaningful.

5. Fences

That expensive privacy fence around your Airbnb?

It may have a much shorter tax life than the house.

Fencing is commonly treated as a land improvement and may qualify for 15-year depreciation.

On larger properties. - or properties with substantial decorative, security, or privacy fencing - the numbers can become significant.

6. Driveways and Parking Areas

Concrete and asphalt aren't automatically part of the building.

Driveways, parking areas, curbs, sidewalks, and certain other paved surfaces may qualify as land improvements with shorter depreciation periods.

For large vacation homes, multifamily properties, and commercial buildings, these improvements can represent a substantial portion of the property's total cost.

7. Swimming Pools and Outdoor Amenities

Pools can be particularly interesting in cost segregation.

The appropriate classification depends on the property's use and the specific components involved, but certain pool-related improvements, decking, fencing, equipment, and other outdoor amenities may potentially receive different depreciation treatment than the primary building.

The same concept can apply to other outdoor features commonly found at vacation rentals.

8. Decorative and Specialty Lighting

Not every light fixture necessarily has to be treated exactly like the building's general electrical system.

Certain decorative or specialty lighting may qualify as personal property depending on its function and how it is installed.

This is one of the reasons a detailed cost segregation study looks at individual building components rather than simply dividing the purchase price between "land" and "building."

9. Cabinets, Millwork, and Specialty Finishes

The tax treatment of cabinetry and millwork depends heavily on how the property is used and how the items are attached.

Some components are structural and remain part of the building.

Others - particularly certain specialty or business-specific installations - may potentially qualify for shorter recovery periods.

This is an area where proper classification matters. Simply assuming every cabinet or built-in qualifies for accelerated depreciation can be just as problematic as assuming none of them do.

10. Outdoor Structures and Site Improvements

Rental properties often contain valuable improvements outside the four walls of the building.

Depending on their construction and use, items such as certain patios, walkways, retaining features, site lighting, drainage improvements, fencing, and other exterior improvements may qualify for shorter depreciation periods.

For vacation rentals with elaborate outdoor spaces, the total value can be substantial.

Why Does This Matter?

Consider a rental property purchased for $600,000.

After allocating a portion of the purchase price to land, perhaps $500,000 remains as depreciable property.

Without cost segregation, much of that amount may be depreciated over 27.5 years.

A cost segregation study instead analyzes the property and identifies qualifying components that can appropriately be classified into shorter recovery periods.

If, for illustration, a study identified $125,000 of qualifying shorter-life property, the owner could potentially accelerate a substantial amount of depreciation rather than waiting decades to claim it.

The exact tax benefit depends on numerous factors, including the property's classification, placed-in-service date, applicable bonus-depreciation rules, the owner's tax rate, passive-activity rules, and whether the owner can currently use the resulting losses.

That's why cost segregation isn't about creating deductions that don't exist.

It's about properly identifying when you're entitled to take depreciation sooner.

Short-Term Rental Owners Should Pay Particular Attention

Cost segregation can be especially powerful when paired with a qualifying short-term rental strategy.

Under certain circumstances, a short-term rental may not be treated as a "rental activity" for purposes of the passive activity rules. If the taxpayer also materially participates, losses generated by depreciation may potentially offset other nonpassive income.

That's one reason cost segregation has become such a popular tax-planning strategy among Airbnb and vacation-rental investors.

However, simply owning an Airbnb does not automatically make depreciation losses deductible against wages or other active income. The average rental period, material participation, personal use, at-risk limitations, and other tax rules still matter.

The Bottom Line

Your rental property isn't necessarily one giant 27.5-year asset.

It may contain dozens - or even hundreds - of individual components with different tax lives.

Furniture. Appliances. Fencing. Landscaping. Driveways. Certain flooring. Outdoor improvements.

Properly identifying those components can significantly accelerate depreciation and potentially reduce taxes during the years when those deductions are most valuable.

And you don't necessarily need to own a multimillion-dollar property for a cost segregation study to make sense.

At 24 Hour Cost Seg, we specialize in making cost segregation practical and affordable for residential real estate investors.

Our residential cost segregation studies for qualifying properties under $2 million are just $499, with a 24-hour turnaround.

Before you depreciate everything over the next 27.5 years, find out how much of your property may qualify to be depreciated faster.

You bought the deductions. Make sure you're actually using them.

This article is for general educational purposes and is not individualized tax, legal, or accounting advice. Cost segregation classifications and the ability to use depreciation deductions depend on the specific property and taxpayer circumstances. Consult your tax professional regarding your individual situation.