The Documentation Gap That’s Costing Apartment Investors Thousands in Lost Depreciation

Written by:

Heather Hook

Date:

23 Apr 2026

KeyCrew Studio

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An investor buys a 20-unit apartment building. The plan is straightforward: renovate units as leases turn over – new flooring, cabinetry, lighting, HVAC upgrades – spending roughly $500,000 over the next two years. The renovation strategy is sound. The tax planning behind it, in most cases, is not.

The problem is not that these investors are unaware of cost segregation. Many have already done a study on their original purchase. The problem is that the renovation phase generates an entirely separate category of depreciable activity – and most investors are not tracking it with the detail required to capture the full tax benefit.

Partial Dispositions: The Deduction Most Value-Add Investors Miss

When an apartment investor rips out flooring, removes cabinetry, or replaces fixtures during a unit renovation, those removed assets do not simply disappear from a tax perspective. If a cost segregation study has been performed on the original property, each of those removed assets has a remaining undepreciated value on the investor’s fixed asset schedule. A partial disposition allows the investor to write off that remaining value in the year the asset is removed.

Brian Kiczula, a cost segregation specialist and founder of CostSegRx, explains that the deduction works on both sides of the renovation. It’s not just the new assets going in – the removed items carry remaining depreciable value that can be written off through a partial disposition. “That’s one of the reasons a cost segregation study is so powerful for value-add investors,” Kiczula says.

This means renovation generates deductions on both sides of the ledger: accelerated depreciation on the new assets going in, and disposition write-offs on the old assets coming out. But capturing both requires knowing exactly what was removed and what was installed – which is where most investors fall short.

The Contractor Invoice Problem

The documentation breakdown is not theoretical. It is one of the most common issues cost segregation professionals encounter when working with value-add apartment investors.

The typical scenario: a general contractor or subcontractor submits a monthly invoice with a lump sum – $10,000 for work completed – without itemizing what was removed, what was installed, or the individual cost of each component. That lump sum then gets recorded as a single capital improvement line item on the investor’s books.

Kiczula says most of the invoices he receives are handwritten notes with a single total at the end of the month and no breakdown of individual items. When the cost segregation study begins, his team has to reconstruct what was actually done. “We’re having to piece it together after the fact,” he says.

The consequence is tangible. Without itemized records, short-life assets that qualify for five-year accelerated depreciation – removable flooring covers, appliances, decorative lighting – get buried in that general renovation line item and end up depreciating over 27.5 years instead. The investor still claims the deduction. They just claim it over a period that is five times longer than necessary.

How Should Apartment Investors Track Renovation Costs for Tax Purposes?

The fix is procedural, not expensive. At the start of a renovation project, the property owner sets up a shared spreadsheet – a Google Sheet, an Excel file, anything accessible to both the owner and the contractor – and requires monthly itemization: what was removed from each unit, what was installed, and the cost of each line item.

Kiczula recommends establishing the standard operating procedure at the beginning of the job, especially when the property owner expects to work with the same contractors across a multi-unit renovation. “If you let it slip, you’re never going to get it back,” he says.

The documentation does not need to be elaborate. It needs to be consistent. A contractor who logs “remodeled kitchen: $3,000 cabinets, $1,500 refrigerator, $2,000 electrical rewiring” gives the cost segregation professional everything required to classify each asset correctly. A contractor who logs “kitchen renovation: $6,500” does not.

When the Records Are Already Missing

For investors who have already completed renovations without detailed documentation, the situation is recoverable – but not without tradeoffs. Cost segregation firms can reconstruct construction cost estimates by analyzing what work was done, applying industry cost data, and estimating the breakdown. The process works, but it is more labor-intensive and more expensive than working from clean records.

And there is a practical ceiling. When records are missing, some short-life assets will inevitably go unaccounted for. The investor still benefits from the study, but they do not capture the full value they would have with proper documentation in place from the start.

The Bigger Picture for Value-Add Investors

Apartment renovation is not just a capital improvement play. When structured correctly with a cost segregation study and proper documentation, it is a depreciation strategy – one that generates deductions on both the assets being installed and the assets being removed. The investors capturing the full benefit are not deploying a more sophisticated tax strategy. They are keeping better records.

About CostSegRx: CostSegRx specializes in engineering-based cost segregation studies for real estate investors, covering property types from residential rentals and apartment complexes to hotels, medical plazas, and storage facilities. The firm provides complimentary estimates of benefit and works directly with investors and their CPAs to ensure accurate reporting. Founded by Brian Kiczula, a member of the American Society of Cost Segregation Professionals, CostSegRx serves clients nationwide from its Sarasota, Florida headquarters. Visit costsegrx.com or call (888) 850-4155.