Parking lot paving, sidewalks, curbs, fencing, landscaping, and similar site work are generally 15-year land improvements under Rev. Proc. 87-56 asset class 00.3, and a cost segregation study separates that property from land and from the 27.5-year residential rental or 39-year nonresidential building under §168(c).
For an owner finishing site work for a commercial or multifamily property during late 2026, the cost segregation question is practical: a cost segregation study can move qualifying paving, curbs, fencing, storm improvements tied to the lot, and landscaping into 15-year MACRS property, while land itself stays nondepreciable and the building shell stays on its 27.5-year or 39-year life under §168(c).
Is parking lot paving 15-year property for depreciation?
Yes, parking lot paving is generally 15-year property when it is a land improvement described in Rev. Proc. 87-56 asset class 00.3, rather than land or part of the 27.5-year residential rental or 39-year nonresidential building under §168(c). That asset class generally covers land improvements such as sidewalks, roads, canals, waterways, drainage facilities, sewers, wharves and docks, bridges, fences, landscaping, shrubbery, and similar improvements. Landscaping planted next to the building, such as shrubbery that would be destroyed if the building were replaced, follows the building's 27.5-year or 39-year life under Rev. Rul. 74-265, so only landscaping that is not adjacent to the building in that sense is a 15-year land improvement.
The key line is that land is never depreciated, but a separate improvement to land can be depreciated when the improvement has its own MACRS recovery period under §168. In a cost segregation study, paving is not treated as dirt merely because it sits outside the building; the study identifies the improvement, ties it to project costs, and separates it from the land value and the building structure.
For owners finishing paving or landscaping in 2026, this distinction matters because 15-year land improvements have a recovery period of 20 years or less and can qualify for bonus depreciation under §168(k) when the property meets the acquisition, use, and placed-in-service rules. A cost segregation study does not create new basis; it changes the timing of cost recovery by classifying the same basis into shorter-lived property when the facts and tax rules support that classification.
Which site-work costs can a cost segregation study usually separate from land?
A cost segregation study can usually separate depreciable site improvements from land when the costs are tied to specific improvements such as parking lots, sidewalks, curbs, fencing, lighting foundations, retaining features, drainage tied to the paved area, and landscaping described by Rev. Proc. 87-56 asset class 00.3. The same study should also separate nondepreciable land value from depreciable improvements, because land is not recovered through depreciation under §167 or §168.
General clearing, rough grading, and earthwork that prepare raw land for use are generally treated as part of land when the work is not tied to a specific depreciable asset, while excavation and grading done for a specific improvement, such as the parking lot, generally follow that improvement when the facts and invoices support that allocation. Your tax advisor should confirm that line because project records often mix site preparation, utility work, paving, stormwater, and landscaping in the same contractor pay applications.
Useful documents include the closing or settlement statement, construction costs and invoices, contractor pay applications, the current depreciation schedule, and a land-value source such as an assessor ratio or appraisal. ClickDrag Finance studies are document-driven and human-reviewed, built on the cost classification approach described in the IRS Cost Segregation Audit Techniques Guide.
For a calendar-year taxpayer, what does placed in service by December 31 mean for site work?
For a calendar-year taxpayer, site work placed in service by December 31, 2026 means the paving, landscaping, or other improvement is in a condition of readiness and availability for its specifically assigned function under Treas. Reg. §1.46-3(d)(1)(ii) and Treas. Reg. §1.167(a)-11(e)(1)(i). For a rental property, the building or improvement is placed in service when it is ready and available for its intended rental or operational use, not merely when the invoice is dated or when the contractor first mobilizes.
For a calendar-year taxpayer, site work placed in service (ready and available for its intended use) by December 31, 2026 can be depreciated on the 2026 return under §168, while site work placed in service on January 1, 2027 or later is first depreciated on the 2027 return under §168. A fiscal-year taxpayer uses the end of its own tax year under §441 and the applicable placed-in-service rules, rather than the calendar-year cutoff.
A property bought with tenants in place is usually placed in service at acquisition under Treas. Reg. §1.46-3(d)(1)(ii) when it is ready and available for its assigned rental function, but a property that needs renovation before it can be rented usually is not placed in service until it is ready and available for rent. For a parking lot, practical evidence may include contractor completion records, municipal approval when required, striping completion, accessibility features, lighting connections, and whether the lot was available for tenant, customer, or resident use.
Does 15-year paving qualify for 100% bonus depreciation in 2026?
Yes, 15-year paving can qualify for 100% bonus depreciation on a 2026 return when the property is qualified property under §168(k), has a recovery period of 20 years or less, is acquired after January 19, 2025 under IRS Notice 2026-11, and is placed in service in 2026. Bonus depreciation under §168(k), as amended by OBBBA in 2025, is 100% permanently for qualified property acquired after January 19, 2025.
IRS Notice 2026-11 ties acquired date to the written binding contract rules rather than simply to a closing date: under Treas. Reg. §1.168(k)-2(b)(5)(ii)(B), the acquired date is the latest of the date the contract was signed, the date it became enforceable under state law, the end of any cancellation period, and the date any contingency was satisfied. A written binding contract for §168(k) purposes generally must be enforceable under state law and must not limit damages to a specified amount, including through a liquidated damages clause.
When the contract is not binding in that sense, the acquired date is generally when the taxpayer has paid or incurred more than 10 percent of the total cost, excluding land and preliminary activities, under Treas. Reg. §1.168(k)-2(b)(5)(iii) and Treas. Reg. §1.168(k)-2(b)(5)(v). For self-constructed property, including property built for the taxpayer under a written binding contract entered into before construction began, property is acquired when physical work of a significant nature begins under Treas. Reg. §1.168(k)-2(b)(5), and paying or incurring more than 10 percent of the total cost, excluding land and preliminary activities, is a safe harbor under that regulation.
Qualified property acquired on or before January 19, 2025 and placed in service in 2026 stays on the TCJA phase-down at 20% for 2026 under §168(k), other than long-production-period property and certain aircraft under §168(k)(2)(B) and §168(k)(2)(C), which run a year behind. Used paving or other used property qualifies only when the used-property rules of §168(k)(2)(E)(ii) are met, and a taxpayer may elect out of bonus depreciation for a class of property for a tax year under §168(k)(7).
How do the half-year and mid-quarter conventions affect fourth-quarter site work?
The half-year convention generally applies to 15-year land improvements under §168(d), unless the mid-quarter convention applies under §168(d)(3). Residential rental property and nonresidential real property use the mid-month convention under §168(d), so a 27.5-year residential rental building or 39-year nonresidential building placed in service in a month receives the applicable mid-month treatment rather than the half-year treatment.
The mid-quarter convention applies under §168(d)(3) when the aggregate basis of MACRS property placed in service during the last three months of the tax year is more than 40% of the aggregate basis of all MACRS property placed in service during that year, with residential rental and nonresidential real property excluded from the test under §168(d)(3)(B). For a calendar-year taxpayer, property placed in service by December 31, 2026 and after September 30, 2026 is property placed in service in the last three months of the 2026 tax year under §168(d)(3). The 40% test counts the full depreciable basis of that property; claiming bonus depreciation does not reduce it, while §179 expensing does.
Under the mid-quarter convention in §168(d)(3), fourth-quarter 15-year property gets one and a half months of first-year regular depreciation when bonus depreciation is not claimed. Bonus depreciation under §168(k) is not reduced by the convention, so the mid-quarter convention matters mainly for property on which bonus is not claimed or for basis remaining after bonus, and your tax advisor should run the §168(d)(3) test rather than assuming the answer from the project date alone.
When is a cost segregation study worth it for late-2026 paving and landscaping?
A cost segregation study is worth it when three conditions hold together: the basis is large enough for the accelerated deductions to outweigh the cost of the study, the deduction is usable this year given the owner's passive-activity position, and the hold is long enough to survive recapture. All three, or the honest answer is no.
That test is especially important for site work because a cost segregation study may identify 15-year land improvements that qualify for §168(k) bonus depreciation, but the deduction may not reduce current tax if the owner cannot use the loss under §469. A rental activity is passive unless an exception applies under §469(c)(2), and a passive loss that passive income does not absorb is disallowed under §469(a) and carried forward under §469(b).
Under §469(i), an individual who actively participates in a rental real estate activity (a separate test from material participation, and one that requires an interest of at least 10% by value (a spouse’s interest counts) throughout the year) is exempt from the §469(a) disallowance for up to $25,000 of loss from the rental real estate activities in which the individual actively participates; the $25,000 is reduced by 50% of modified adjusted gross income above $100,000 and is gone at $150,000, and for a married individual filing separately it is $12,500, phasing out between $50,000 and $75,000, only if the spouses lived apart for the entire year, and zero if they lived together at any time during the year.
Under §469(c)(7), a taxpayer is a real estate professional only if more than one-half of the personal services the taxpayer performs in trades or businesses during the year are performed in real property trades or businesses in which the taxpayer materially participates, and the taxpayer performs more than 750 hours of services during the year in real property trades or businesses in which the taxpayer materially participates (on a joint return, one spouse must meet both tests alone); the rental loss is then nonpassive only if the taxpayer also materially participates in that rental activity, with each rental tested separately unless the election under Treas. Reg. §1.469-9(g) to treat all interests in rental real estate as one activity was made. If a nonpassive loss can offset wages or other nonpassive income, the basis rules, at-risk rules under §465, and excess business loss limitation under §461(l) also apply in that same tax year.
For a practical first screen before your tax advisor models the 2026 return, the ClickDrag cost segregation qualifier asks two to four short questions and then sends you to the next step for your property. If you are comparing providers, our guide to cost segregation company selection explains what to look for in scope, review process, and supporting schedules.
What happens to 15-year paving depreciation when the property is sold?
On a later taxable sale at a gain, 15-year paving and other land improvements are generally §1250 property, not §1245 property, and §1250 ordinary-income recapture reaches only depreciation taken above straight-line, including bonus depreciation, up to the gain. For land improvements held more than one year, §1250 recapture treats depreciation taken above straight-line, including bonus depreciation, as ordinary income, and the rest of the depreciation on those land improvements is generally unrecaptured §1250 gain taxed at up to 25% for a noncorporate taxpayer under §1(h)(1)(E).
By contrast, §1245 recapture generally applies to many 5-year and 7-year tangible personal property assets identified in a cost segregation study, and §1245 recapture is ordinary income up to the amount of depreciation taken when the property is sold at a gain. The 27.5-year residential rental or 39-year nonresidential structure is §1250 property, and depreciation on that structure is generally unrecaptured §1250 gain, taxed at a maximum 25% rate for a noncorporate taxpayer under §1(h)(1)(E), when the sale is taxable and gain is recognized.
For an investment in a Qualified Opportunity Fund held at least 10 years, with the IRC §1400Z-2(c) basis election made on a sale of the QOF interest, the gain on that interest, including the part attributable to depreciation, is excluded; a sale of the underlying assets by the fund is not treated the same way. If your paving or landscaping is inside a Qualified Opportunity Fund or Qualified Opportunity Zone Business structure, read our Opportunity Zone cost segregation guide with your tax advisor before modeling bonus depreciation and exit treatment.
Do I need Form 3115 if the paving was completed in 2026?
No, Form 3115 is not needed for 2026 site work when the owner places the property in service in 2026 and reports the corrected cost segregation classifications on the original 2026 return. In that situation, the study supports the first depreciation schedule for the asset, so there is no method change for prior depreciation.
A Form 3115 cost segregation method change becomes relevant when a study corrects depreciation for a property you placed in service in an earlier tax year and still own. Under the automatic change procedures of Rev. Proc. 2015-13 and section 6.01 of Rev. Proc. 2025-23, the missed depreciation is claimed on Form 3115 with no amended returns when the property has been depreciated on two or more filed returns, or on one filed return if the taxpayer placed it in service in the tax year immediately before the year of change (the year of the return the Form 3115 is filed with), and the taxpayer still owned the property at the start of the year of change and meets the other eligibility rules.
For a 2026 calendar-year return, a building or site improvement you placed in service in 2024 or earlier and still own can generally use Form 3115 with the 2026 return under section 6.01 of Rev. Proc. 2025-23 and Rev. Proc. 2015-13, subject to eligibility rules. For a building or site improvement you placed in service in 2025 with the 2025 return filed, Form 3115 with the 2026 return or an amended 2025 return filed before the 2026 return is filed are both available under section 6.01 of Rev. Proc. 2025-23 and Rev. Proc. 2015-13, and a prior election out of bonus depreciation cannot be undone through this automatic change under section 6.01(1)(c)(vi) of Rev. Proc. 2025-23.
Related reading: Placed in Service by December 31: Calendar-Year Rental Depreciation and Cost Segregation for 2026, Bonus Depreciation in 2026: What Real Estate Owners Need to Know and The January 19, 2025 Line: How the Acquired-Date Test Sets Your Bonus Depreciation Rate.
Related: Does Depreciation Restart When You Transfer a Rental to an LLC? Cost Segregation for 2026.
Frequently Asked Questions
Is parking lot paving 15-year property for depreciation?
Yes, parking lot paving is generally 15-year property for depreciation when it is a land improvement under Rev. Proc. 87-56 asset class 00.3. A cost segregation study separates that paving from nondepreciable land and from the 27.5-year residential rental or 39-year nonresidential building under §168(c).
Does cost segregation make landscaping eligible for bonus depreciation?
Cost segregation can make qualifying landscaping eligible for bonus depreciation when the landscaping is not adjacent to the building (shrubbery that would be destroyed if the building were replaced follows the building under Rev. Rul. 74-265) and is a 15-year land improvement under Rev. Proc. 87-56 asset class 00.3 and is qualified property under §168(k). Land itself never qualifies for depreciation, and general clearing or grading that is part of land generally does not become bonus-eligible merely because a study is performed.
For a calendar-year taxpayer, can site work placed in service by December 31, 2026 go on the 2026 return?
Yes, for a calendar-year taxpayer, site work placed in service by December 31, 2026 can go on the 2026 return when it is ready and available for its intended use under Treas. Reg. §1.46-3(d)(1)(ii). If the site work is first ready and available on January 1, 2027 or later, depreciation first begins on the 2027 return under §168.
Are 15-year land improvements §1245 property or §1250 property for recapture?
Fifteen-year land improvements are generally §1250 property, not §1245 property, when they are items such as paving, sidewalks, fencing, curbs, and landscaping. On a taxable sale at a gain, depreciation above straight-line on §1250 land improvements held more than one year, including bonus depreciation, is ordinary income under §1250, and the rest is generally unrecaptured §1250 gain for a noncorporate taxpayer.
What documents help a cost segregation study classify paving and landscaping?
The most useful documents are the settlement statement, construction invoices, contractor pay applications, the current depreciation schedule, and a land-value source such as an assessor ratio or appraisal. Those records help the cost segregation study separate 15-year land improvements under Rev. Proc. 87-56 asset class 00.3 from land and from the building under §168.
