Land Improvements and Site Preparation Depreciation: 15-Year MACRS

Land improvements can be depreciated over 15 years under MACRS, and for assets placed in service after January 19, 2025, the full cost can be written off in the first year through 100% bonus depreciation. The land itself is never depreciable, because the ground doesn’t wear out. Everything you attach to it that does wear out (paving, fencing, drainage, lighting, irrigation) qualifies for annual depreciation deductions as long as it’s used in a business or held for the production of income.¹

What Counts as a Depreciable Land Improvement

An addition to your property qualifies for depreciation when it meets three conditions. It must have a determinable useful life longer than one year. It must be used in a trade or business or held for income production. And it must be the type of asset that physically decays, becomes obsolete, or gets used up over time.¹

Personal-use improvements are out. A driveway at your primary home or a decorative fence around your yard is not a business asset, so its cost is never deductible. Rental property owners and commercial operators are the taxpayers who get the benefit.

Depreciation starts when the improvement is placed in service, meaning ready and available for its intended use. Actual revenue production isn’t required. A parking lot finished in November is placed in service in November even if the tenant doesn’t open until January. Two records drive everything that follows: the date the asset went into use, and the total cost basis assigned to it.

Common Examples

The IRS groups land improvements under MACRS asset class 00.3.¹ The category is broad:

Paved surfaces: parking lots, sidewalks, and private roads
Fences, retaining walls, and security barriers
Bridges and culverts
Drainage systems, including sewers, stormwater pipes, and detention basins
Irrigation systems, pumps, and sprinkler infrastructure
Outdoor lighting, signage, and related site electrical work

Freestanding perimeter security equipment (cameras, access gates, exterior surveillance) is typically treated as a 15-year land improvement. Systems wired into a building’s structure follow the building’s longer recovery period instead.

The 15-Year MACRS Schedule

Under the General Depreciation System, land improvements have a 15-year recovery period. That’s much shorter than the 27.5 years for residential rental buildings or 39 years for commercial buildings, so annual deductions are larger early on.¹

The default method for 15-year property is 150% declining balance, which front-loads the deduction and automatically switches to straight-line once that produces a larger write-off.² The half-year convention applies by default; the asset is treated as placed in service at the year’s midpoint. If more than 40% of all depreciable property you place in service during the year goes into use in the final three months, the mid-quarter convention applies instead.¹

The Alternative Depreciation System stretches the recovery to 20 years and requires straight-line, spreading deductions evenly. ADS is mandatory for property used predominantly outside the United States, property used by tax-exempt entities, and property financed with tax-exempt bonds.¹

100% Bonus Depreciation in 2026

The One Big Beautiful Bill Act (P.L. 119-21) permanently reinstated 100% bonus depreciation for qualified property acquired after January 19, 2025.¹ Because land improvements have a 15-year recovery period, sitting well under the 20-year eligibility ceiling, they qualify. A parking lot, fence, or drainage system placed in service in 2026 can be deducted in full in year one.

The math is dramatic. Without bonus depreciation, a $300,000 parking lot depreciated over 15 years under the 150% declining balance method with the half-year convention produces a first-year deduction of roughly $15,000. With 100% bonus depreciation, the full $300,000 is deductible in year one.

You can elect out if spreading the deduction makes more strategic sense, such as when you expect to be in a higher bracket in later years. The OBBBA also allows an election to deduct only 40% (or 60% for property with longer production periods) in the first year for property placed in service during the first tax year ending after January 19, 2025. The election is made on the return for the year the property is placed in service, and it applies to every asset in the same class placed in service that year.

Section 179 Does Not Apply

Section 179 expensing looks like the obvious first move for any big business purchase, but it isn’t available for land improvements. Publication 946 says so directly: land and land improvements do not qualify as Section 179 property, and swimming pools, paved parking areas, wharves, docks, bridges, and fences are given as examples of what’s excluded.¹

The 2026 Section 179 deduction limit is $2,560,000 with the phase-out beginning at $4,090,000, and none of it reaches land improvements no matter how much you spend. Bonus depreciation is the correct accelerated path, and it achieves the same first-year write-off without the Section 179 cap.

Equipment installed on the land but not permanently affixed (movable storage containers, modular structures) can still qualify for Section 179. The test is whether the asset is a fixed land improvement or removable tangible personal property.

Site Preparation and Landscaping

Clearing, grading, and excavation catch many owners off guard because they can go either way. The IRS default is that general site preparation gets added to the land’s basis and never depreciates.¹ Grading that makes a sloped lot buildable benefits the land permanently regardless of what you eventually put on it.

The exception applies when the dirt work is so tightly tied to a specific depreciable asset that it would have to be redone if that asset were replaced. Revenue Rulings 65-265 and 68-193 set this rule: grading and landscaping costs are depreciable when they would be retired, abandoned, or replaced at the same time as the associated building or structure.³ Excavation for a particular foundation, trenching for utility lines running to a specific building, and grading that shapes the ground immediately around a structure fall inside the exception.

Publication 527 uses shrubs to illustrate: shrubs planted right next to a rental house would be destroyed if the house were demolished and rebuilt, so they have a determinable useful life and are depreciable. Shrubs planted along the property line, away from any structure, get added to the land’s basis.⁴

How your contractor bills matters. General site clearing should be invoiced separately from foundation excavation and structure-specific grading. A single lump-sum line item makes it hard to defend an allocation later. Architectural plans and engineering surveys support the split if the IRS asks.

Cost Segregation Studies

A cost segregation study is an engineering-based analysis that reclassifies components of a building from their default 39-year or 27.5-year schedule into shorter categories, including 15-year land improvements and 5- or 7-year personal property. Drainage pipes, parking surfaces, sidewalks, bollards, and outdoor landscaping often move from the building’s 39-year schedule into the 15-year land improvement class. Interior items like specialty lighting, carpet, cabinetry, and dedicated electrical outlets move to 5- or 7-year classes.

The study doesn’t create new deductions. The total depreciation is the same either way. What it does is pull that deduction into the current year, and with 100% bonus depreciation available on anything with a recovery period of 20 years or less, every dollar reclassified into a 15-year or shorter category can be deducted immediately.

Cost segregation usually makes sense for buildings that cost $1 million or more, are recently built or acquired, or contain a high proportion of site work and interior finish. Use a qualified engineer or CPA firm with cost segregation experience; the results have to hold up under audit.

Demolition and Environmental Cleanup

Tearing down an existing structure doesn’t produce a deduction. Section 280B prohibits any deduction for demolition costs or losses from demolishing a structure. The demolition costs and any remaining undepreciated basis of the demolished building are both added to the land’s basis, where they sit permanently with no future recovery.⁵ The rule applies whatever the reason for demolition, including condemnation or storm damage. If you acquire a property planning to raze the existing building, the entire purchase price effectively becomes land basis once you do.

Environmental cleanup runs on a different framework. Under Revenue Ruling 94-38, remediating contamination that occurred during your ownership is deductible as an ordinary business expense, because you’re restoring the property to the condition it was in when you bought it. Cleaning up contamination that predates your ownership improves the property beyond the condition you acquired it in, so those costs are capitalized to the land’s basis. Any physical treatment facility you build (a groundwater remediation system, for example) is a separate capital asset with its own depreciable life.⁶

Replacing or Abandoning an Improvement Early

A parking lot may get repaved after 10 years. A fence may come down to make room for an expansion. When a land improvement is retired before its 15-year clock runs out, you don’t have to keep depreciating a component that no longer exists.

Under Treasury Regulation 1.168(i)-8, you can elect a partial disposition of a MACRS asset and deduct the remaining adjusted basis of the retired portion as a loss.⁷ Repave a parking lot after 10 years, claim the loss on the old pavement’s undepreciated basis, and start a fresh 15-year schedule on the new surface, potentially with 100% bonus depreciation. The election is made by reporting the gain or loss on a timely filed return (including extensions) for the year the old component is disposed of; no separate election form is required.⁸ Skip the election and the old improvement stays on your books alongside the new one, overstating basis and understating the annual deduction.

When an improvement is permanently retired without replacement, an abandonment loss under Section 165 may be available, equal to the remaining adjusted basis.⁷ Three things have to be shown: ownership, intent to abandon, and an affirmative act carrying out that intent. Document the date, the reason, and any communications with contractors, engineers, or counsel. The loss is reported on Form 4797, Part II, line 10, as an ordinary loss. Abandonment losses are available only on business or investment property, not on personal-use improvements.

1
Internal Revenue Service. Publication 946 – How To Depreciate Property
2
Office of the Law Revision Counsel. 26 USC 168 – Accelerated Cost Recovery System
3
Internal Revenue Service. Technical Advice Memorandum 200043016
4
Internal Revenue Service. Publication 527 – Residential Rental Property
5
Office of the Law Revision Counsel. 26 US Code 280B – Demolition of Structures
6
Internal Revenue Service. Technical Advice Memorandum 199952075
7
Internal Revenue Service. Publication 544 – Sales and Other Dispositions of Assets
8
Internal Revenue Service. Identifying a Taxpayer Electing a Partial Disposition of a Building