Cost Segregation · Brief · Intro level
Cost segregation for self-storage facilities
Self-storage buildings are cheap; the site around them is not. Studies commonly move 20–30% of basis to short-life classes, driven by paving, fencing, gates, and security — plus a long-running debate over whether unit partitions are structural.
Self-storage is the inverse of most commercial real estate: the buildings are the cheap part. A single-story metal storage building costs a fraction per square foot of an office or hotel, so the asphalt, fencing, gates, lighting, and security that surround it make up an outsized share of what an investor pays. A cost segregation study typically moves 20–30% of a facility's depreciable basis out of the 39-year class — most of it into 15-year land improvements rather than 5-year equipment.
Where the short-life basis comes from
A storage facility is essentially a paved, fenced, lit, and monitored yard with inexpensive shells on it. Under MACRS (Pub 946), those site elements are 15-year land improvements, and the operating equipment is 5-year personal property. The Cost Segregation Audit Techniques Guide supplies the framework examiners use to test the split.
Illustrative allocation for a $4M single-story storage facility, land excluded:
| Component | Class | Share of basis |
|---|---|---|
| Security cameras, access keypads, office FF&E | 5-year §1245 | 5% |
| Movable unit partitions (facility-specific) | 5-year §1245 (contested) | 4% |
| Asphalt drives, curbs, striping | 15-year land improvement | 10% |
| Perimeter fencing, automated gates | 15-year land improvement | 5% |
| Exterior lighting, landscaping, signage | 15-year land improvement | 4% |
| Building shells, roll-up doors, office structure | 39-year nonresidential | 72% |
Illustrative only; multi-story climate-controlled facilities carry more building and less site, pushing the reclassified share toward the low end. Both the 5- and 15-year buckets are eligible for 100% bonus depreciation on property acquired after January 19, 2025.
The partition debate
The interesting fight in storage is the unit partitions — the corrugated metal dividers that turn a shell into two hundred rentable units. Study providers argue they are personal property under the movability factors courts developed in Whiteco Industries v. Commissioner, 65 T.C. 664 (1975): they bolt in, they come out without damaging the structure, and operators genuinely relocate them to reconfigure unit mix as demand shifts between 5×5s and 10×20s. The counterargument: in many facilities the partitions are integrated into the frame, and a wall that never actually moves looks like a structural component no matter how it is fastened. There is no bright-line ruling for storage partitions; the position stands or falls on the engineering facts and documentation of actual reconfiguration. Treat a study that reflexively grabs all partition cost as a red flag.
One trap: buying the dirt
Storage sites are often bought for the land as much as the improvements, and the land allocation comes before the study. Land is not depreciable at all, and paving-heavy facilities tempt owners to allocate as little to land as possible. An indefensibly low land value poisons every number downstream — the IRS challenges the land split more easily than any component classification. Anchor it to the assessment ratio or an appraisal before segregating what remains. For context on how storage compares to other classes, see cost seg by property type and the class-life framework in asset classes and recovery periods.
Frequently asked questions
- How much of a self-storage facility can cost segregation reclassify?
- Commonly 20% to 30% of depreciable basis. The buildings themselves are inexpensive metal structures, so site improvements — asphalt drives, perimeter fencing, gates, exterior lighting, and landscaping — represent an unusually large share of total cost and depreciate over 15 years. Security systems, office equipment, and signage add 5-year property. The building shells remain 39-year nonresidential real property.
- Are storage unit partitions 5-year or 39-year property?
- It depends on whether they are structural. Bolt-in metal partitions that can be relocated to reconfigure unit mix are argued to be 5-year personal property under the movability factors of Whiteco Industries v. Commissioner; partitions that carry the roof load or are welded into the frame are structural components at 39 years. The IRS scrutinizes aggressive partition reclassification, so the engineering facts of each facility matter.
- Is cost segregation worth it for a small storage facility?
- Often yes, at lower basis than other property types. Because site work is such a large fraction of a storage facility's cost, even a facility with $1M to $2M of depreciable basis can reclassify enough into 15-year land improvements — all bonus-eligible for property acquired after January 19, 2025 — to comfortably exceed a study fee.