Parking Structures and Garages
Stand-alone parking garages are buildings under Treas. Reg. §1.48-1(e)(1) and the IRS retail matrix, recovered over 39 years. Surface lots are 15-year land improvements. ATG Chapter 8.B rejects 15-year treatment of open-air parking structures and mentions penalties.
Educational information, not tax advice.
Updated 2026-10-14
Key takeaways
- Treas. Reg. §1.48-1(e)(1) lists structures that provide parking space and lists garages as buildings.
- The retail matrix lists parking structures, garages, and ramps as 39-year buildings and surface lots as class 00.3, 15-year.
- ATG Chapter 8.B treats stand-alone open-air parking structures as 39-year buildings and says penalties should be strongly considered for 15-year positions.
- Chapter 7.H treats attached residential parking as 27.5-year property and a stand-alone parking structure as 39-year.
- Gates and pay stations are analyzed separately from the structure.
- Bonus depreciation as of 2026 can apply to qualified equipment and surface-lot work acquired after January 19, 2025, not to a 39-year garage.
Whether a parking facility is a building or a land improvement changes the recovery period from 39 years to 15. Treas. Reg. §1.48-1(e)(1) defines a building as a structure enclosing space, usually roofed, used for example to provide parking space, and lists garages as examples. Treas. Reg. §1.48-1(c) lists paved parking areas as not tangible personal property. Publication 946 class 00.3 covers land improvements such as sidewalks and roads and excludes buildings and structural components.
The retail matrix draws the same line: lots, including striping, curbs, landscape islands, perimeter fences, and sidewalks, are 00.3; parking structures are buildings. ATG Chapter 8.B is devoted to stand-alone open-air parking structures. The IRS position in that chapter is that they are 39-year buildings. The guide says penalties should be strongly considered when a 15-year land-improvement position is taken on those structures.
Chapter 7.H adds a residential overlay. Attached parking structures, garages, and carports on residential rental property are 27.5-year property. A stand-alone parking structure is 39-year nonresidential property, with a cross-reference to Chapter 8.B. A hotel or apartment with both a surface lot and a podium garage should not treat them as one 15-year asset.
The garage’s floors, ramps, walls, and building lighting are structural components. Equipment such as gates, ticket machines, and some control systems may be personal property or 00.3 land improvements depending on the row cited. The pharmaceutical and residential matrices place some parking-control systems in 00.3. Pole-mounted lot lighting is 00.3; building-mounted garage lighting is generally building.
Taxpayers have argued that an open-air structure is a land improvement. Chapter 8.B is the IRS examiner answer to that argument. This page describes that guidance. It is not a statute, and the ATG states that it is not an official pronouncement of law. A CPA should be asked before a return takes a 15-year position on a garage.
This article is educational information, not tax advice. Proposed Super Intelligence garage templates are explanatory only.
Lots versus structures
A surface lot with striping and wheel stops is the classic 00.3 asset. A multi-level structure with ramps and floors that cars park on is a building under the regulation and the matrices. A carport attached to a residential rental building follows Chapter 7.H's attached-parking row. Publication 946 class 00.3 excludes buildings and structural components as defined in Treas. Reg. section 1.48-1(e), which is why a garage does not move into 15-year property merely because it is open-sided.
Do not treat a below-grade podium that is the building’s first story as a 15-year lot. Do not treat a stand-alone open-air deck as 15-year property solely because it has no exterior walls. Chapter 8.B is aimed at that fact pattern.
Equipment in the garage
Gates, pay stations, and ticket machines are not the structure. Classify them under Treas. Reg. §1.48-1(c) or the ATG parking-control rows. Building-protection security cameras follow the security-system rows (generally §1250). Inventory or revenue-control devices can be personal property on retail-matrix analogies.
Elevators and sprinklers are structural components. Charging equipment for electric vehicles is a machine on its facts and is not given an IRS parking-structure row in the sources opened here. Do not say every charger “is” 5-year property.
Documentation
Drawings that show whether the garage is attached or stand-alone, photographs of open-air versus enclosed construction, and a site plan that separates lots from structures are the core file. Acquisition studies need land first. A written allocation that dumps the garage into “land improvements” is a Peco Foods risk if §1060 applies.
Chapter 4 still requires a legal analysis with citations. Citing “open-air, therefore 15-year” without Chapter 8.B is the position the ATG tells examiners to treat as a penalty candidate.
Bonus depreciation as of 2026
Qualified property acquired after January 19, 2025 is eligible for 100% bonus depreciation under Notice 2026-11. A 39-year garage is not qualified property. A 27.5-year attached residential garage is not qualified property. Surface-lot work (15-year) and qualifying gates or equipment can be. Binding contracts on or before January 19, 2025 stay on the phase-down.
QIP does not convert a garage into 15-year property. Interior improvements of a nonresidential garage might be QIP if they meet §168(e)(6); ramps and structural framework are not QIP. Educational information, not tax advice.
Limits
Do not invent a typical garage-versus-lot split percentage. Confirm attached versus stand-alone status on the drawings.
Municipal or association-owned garages raise an ownership question like the condo page. The taxpayer depreciates only basis the taxpayer has.
Sources
- 1IRS Publication 5653 — Cost Segregation Audit Techniques Guide (rev. 2-2025)(opens in a new tab)
Written for IRS examiners. The guide states it is not an official pronouncement of law and cannot be cited as authority. It predates the July 2025 law.
- 2IRS Publication 946 — How To Depreciate Property (2025)(opens in a new tab)
Appendix B reproduces the Rev. Proc. 87-56 class lives.
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