Narrative
In 2024, the owners of a residential property in La Jolla, California, engaged Engineered Tax Services (ETS) to perform a cost segregation study. The building was placed in service on April 5, 2024, with a total depreciable basis of $491,960. The purpose of the study was to analyze the property’s construction and reclassify its components into appropriate depreciation categories to maximize tax efficiency.
The property includes a single-family residence improved with structural, electrical, mechanical, and interior components typical of residential construction. ETS conducted a detailed physical inspection and reviewed construction and accounting records to document and allocate costs accurately. Each asset was evaluated under IRS guidelines to determine its classification as either real property (§1250) or personal property (§1245).
The owners commissioned ETS to identify and reclassify qualifying assets to accelerate depreciation under the Modified Accelerated Cost Recovery System (MACRS). The study determined that accelerated depreciation resulted in a total increase of $106,377.95 in accumulated depreciation through 2024. This engineering-based approach provided the owners with a defensible, IRS-compliant report and improved cash flow through optimized tax savings.
Objective
The primary objective of the cost segregation study was to identify and classify all components within the $491,960 depreciable basis to maximize tax savings. By segregating short-lived assets from long-life structural components under the Modified Accelerated Cost Recovery System (MACRS), ETS enabled the acceleration of depreciation deductions and improved the property owner’s near-term cash flow.
Methodology
ETS employed a detailed, engineering-based approach, which included:
- Physical Inspection:Conducting a site visit to document and photograph the property’s structural and finish components.
- Document Review:analyzing construction cost data, contractor invoices, and accounting records to confirm the total project basis.
- Cost Analysis:applying engineering cost estimation and allocation methods consistent with IRS guidance and R.S. Means data.
- Depreciation Calculation:assigning recovery periods under MACRS and IRS Rev. Proc. 87-56 to determine allowable accelerated depreciation.
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Asset Allocation
5-Year Class Life
Total Depreciation Allocation:$84,875.57 Â Percentage of Total Depreciable Basis:17.26%
5-year class life assets identified in this study include:
- Tangible personal property items qualifying under IRS §1245 guidelines
- Electrical, mechanical, and plumbing components serving specific appliances or dedicated equipment
- Interior trim, decorative finishes, and non-structural elements with shorter useful lives
- Removable fixtures or connections not permanently affixed to the structure
15-Year Class Life
Total Depreciation Allocation:$28,960.40Percentage of Total Depreciable Basis:5.89%
15-year class life assets identified in this study include:
- Land improvements such as paving, concrete flatwork, and exterior walkways
- Landscaping and irrigation systems
- Site drainage, retaining walls, and exterior utility connections supporting the property grounds
27.5-Year Class Life
Total Depreciation Allocation:$378,124.03Percentage of Total Depreciable Basis:76.85%
27.5-year class life assets identified in this study include:
- Structural framing, foundation, and load-bearing walls
- Roofing system and exterior building envelope
- Permanent plumbing, HVAC, and electrical distribution systems
- Interior walls, ceilings, and flooring are attached to the structure
- Windows, doors, and other permanently affixed components
Class Life Details:
Summary
The cost segregation study for the La Jolla, California, property demonstrated measurable tax benefits through the reclassification of qualifying components into shorter depreciation periods. By identifying 5-year and 15-year assets within the total $491,960 basis, ETS provided a defensible, IRS-compliant allocation that accelerates deductions and enhances cash flow.
According to the study, accumulated depreciation through 2024 without cost segregation totaled $12,671.70. With cost segregation applied, accumulated depreciation increased to $119,049.65, resulting in an additional $106,377.95 in allowable depreciation. This adjustment delivers immediate tax savings and improved liquidity for the property owner.
This engineering-based approach not only improved the property’s near-term tax position but also strengthened long-term capital management. The case study highlights how cost segregation can substantially increase the financial performance of residential real estate investments through accelerated depreciation and strategic tax planning.
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