Self-storage is one of the quiet overperformers in cost segregation, for a structural reason: the facility's value sits as much in the site as in the buildings. Drive aisles, perimeter fencing, electric gates, lot lighting, and landscaping are all 15-year land improvements under asset class 00.3 of Rev. Proc. 87-56, reflected in the tables of IRS Pub 946, while the single-story metal buildings themselves are inexpensive 39-year nonresidential shells. When the shells are cheap and the site work is extensive, the short-life share of total basis runs high.
Where the short-life dollars come from
A typical facility study pulls from 3 buckets. First, 15-year land improvements: asphalt and concrete paving, curbs, striping, perimeter and interior fencing, gates and gate operators, pole lighting, signage foundations, storm drainage, and landscaping. Second, 5- and 7-year personal property: keypad access and gate control systems, security cameras and monitoring equipment, office furniture and casework in the rental office, and movable partition systems where unit dividers are non-load-bearing and demountable. Third, for climate-controlled buildings, the portion of HVAC and dedicated electrical serving specialized spaces can be examined, though HVAC conditioning a building generally remains structural under Reg 1.48-1(e)(2) and gets close review under the IRS Cost Segregation Audit Techniques Guide.
A worked example
An investor buys a 450-unit facility for $1,800,000 and allocates $350,000 to land, leaving $1,450,000 of depreciable basis. Suppose a study finds $340,000 of 15-year land improvements, mostly paving and fencing across 3 acres, plus $110,000 of 5- and 7-year property in gate, security, and office assets. That is $450,000, about 31 percent of basis, in bonus-eligible classes. Acquired in 2026, after the January 19, 2025 line OBBBA drew for permanent 100 percent bonus under IRC section 168(k), the full $450,000 is deductible in year 1. Straight 39-year treatment on the whole $1,450,000 would have produced only about $37,179 that first year.
When it is not worth it
The same site-heavy profile cuts the other way in some deals. If the land allocation is very high, common when storage sits on valuable commercial corridors, the depreciable base shrinks and so does the benefit. Very small facilities may not generate enough first-year deduction to justify study fees. Owners who cannot use the losses, because the activity is passive under section 469 and they have no passive income and no real estate professional status, may only be banking suspended losses. And conversions of existing buildings need care: improvements can qualify as 15-year qualified improvement property under IRC section 168(e)(6) only if the building is nonresidential and the work is interior.
A quick screen settles the question before money is spent. Amadae's cost segregation screen produces a screening estimate, explicitly not an engineering study, of the land improvement and personal property share for a specific facility, and Amadae coordinates the engineering study and prepares the return, including Form 3115 catch-up math for facilities owned for years.