Is chimney repair tax deductible?
Repair or rebuild?
The tax treatment depends on what the work does:
- Repairs keep the chimney working: repointing a few mortar joints, sealing the crown, replacing a cap, resealing flashing.
- Improvements restore or upgrade it: rebuilding the chimney above the roofline, relining the flue, replacing a failed crown and the masonry under it.
On your own home, repairs are simply personal expenses. Improvements are not deductible either, but they add to your home's basis, which can reduce taxable gain when you sell. Keep the invoices with your home records; IRS Publication 523 explains basis.
Rental property
Chimney repairs on a rental are generally deductible in the year paid. A rebuild or new liner is generally capitalized and depreciated. Publication 527 covers both.
Home office and disasters
If you qualify for a home office deduction, a share of repairs to the whole house may be deductible. And if a qualifying declared disaster damaged the chimney, the unreimbursed loss may count toward a casualty loss deduction after the $100 and 10 percent of income reductions.
Check whether insurance owes it first
Lightning, a falling tree or wind that topples a chimney are generally covered events. Crumbling mortar, spalling brick and crown cracks from age are not. Chimney leaks that show up on the ceiling are often flashing problems at the roof, which may be storm damage or wear. See wear and tear vs storm damage and interior water damage coverage. This is general information, not tax advice.