T-structure (fire-resistant) includes steel, RC, and SRC buildings with lower premiums. H-structure (non-fire-resistant) is mainly wood buildings with higher premiums due to fire risk. Structure class significantly impacts insurance costs.

Fire insurance doesn't cover earthquake, volcanic eruption, or tsunami damage. Since buildings are major assets in real estate investment, earthquake insurance should be considered, especially in high-risk areas. Premiums are tax-deductible.

Yes, fire insurance premiums for investment properties are deductible as necessary expenses for real estate income. For long-term contracts, prorate annually for expense reporting.