Office Walls You Can Potentially Write Off: Demountable Walls & Section 179
The Section 179 advantage
Office Walls You Can Potentially Write Off
Why movable wall systems can potentially be depreciated years sooner than drywall — and may be expensed in the first year.
Demountable walls give you private offices and conference rooms without permanent construction — and the IRS may treat them very differently from drywall at tax time. Because these systems are movable and non-structural, they're generally classified as business personal property, which can potentially mean a far faster write-off — in some cases the full cost in the first year. (Your situation governs — confirm with your CPA.)
Why demountable walls qualify as personal property
Permanent drywall is a building improvement, depreciated over 39 years. A wall system that's non-permanent, removable, and relocatable without damaging the building is generally treated as furniture and fixtures (IRS asset class 00.11) — 7-year property. Same private offices; a very different schedule.
Section 179 and 100% bonus depreciation
Because they're personal property, demountable walls are generally eligible for Section 179 first-year expensing (the 2026 limit is $2,560,000, so any office project sits well under the cap) and for 100% bonus depreciation, restored by the 2025 federal tax law for qualifying property placed in service after January 19, 2025. Combined, a business able to claim them can potentially deduct the entire wall package in year one instead of recovering it over four decades.
Illustrative example — a $50,000 wall package
Permanent drywall: deducted at roughly $1,282 a year, spread across 39 years.
Demountable walls: a business able to use Section 179 / bonus depreciation may deduct the full $50,000 in year one.
Illustrative only and not tax advice. Your actual benefit depends on your business's taxable income and situation — confirm with your CPA. Sources: IRS asset class 00.11; IRC §179; IRC §168(k) bonus depreciation (2025 law); NxtWall Section 179 guidance.
What it means for your project
The walls aren't just walls — they're an asset you can write off faster and take with you when you move. For a price-sensitive buyer, the depreciation story often changes the conversation more than the quote does.
Frequently asked
Do demountable walls qualify for Section 179?
Generally, yes. Because movable, non-structural demountable walls are treated as business personal property rather than a permanent building improvement, they typically qualify for Section 179 expensing and bonus depreciation. Confirm your situation with your CPA.
How many years do you depreciate demountable walls?
Demountable walls are generally depreciated as 7-year personal property (IRS asset class 00.11), versus 39 years for permanent drywall construction.
Are demountable walls a tax advantage over drywall?
On depreciation, yes: drywall is a 39-year building improvement, while demountable walls are typically 7-year personal property eligible for Section 179 and bonus depreciation — a much faster write-off.
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