In real estate investment, a building's statutory useful life is an important concept that directly affects depreciation, financing, and exit strategies. Wooden properties in particular have a short useful life, requiring careful consideration from both tax-saving and financing risk perspectives.
What Is Useful Life? Organizing the Four Types
| Type | Definition |
|---|---|
| Statutory useful life | The depreciation period for fixed assets as defined by tax law (22 years for wooden construction; 47 years for reinforced concrete) |
| Physical useful life | The period during which the building can actually continue to be inhabited. With appropriate maintenance, it can be 2–3 times the statutory period |
| Economic remaining useful life | The period until the building loses its value as real estate (including consideration of repair costs) |
| Expected useful life | The period during which the building is expected to remain usable with standard maintenance |
Exceeding the statutory useful life does not mean the building becomes uninhabitable. However, depreciation for tax purposes ends at that point.
The Statutory Useful Life of Wooden Buildings and the Mechanism of Depreciation
The statutory useful life of wooden construction is 22 years, with a depreciation rate of 0.046. For example, for a wooden apartment building constructed at a cost of 70 million yen, the annual depreciation expense is "70 million yen × 0.046 = 3.22 million yen," which can be recorded for 22 years. During this period, taxable income is compressed, making the tax-saving effect a key factor in boosting the return on real estate investment.
What Are the Risks of Properties That Have Exceeded Their Useful Life?
Depreciation Can No Longer Be Used
After the depreciation period ends, the tax burden increases significantly. This is one of the reasons why over-age properties are sold—to avoid the increase in taxable amounts.
Financing from Financial Institutions Becomes Difficult
Apartment loans can generally only be structured for repayment periods within the statutory useful life. For a wooden apartment building 10 years old, the maximum repayment period would be 12 years. For properties that have exceeded the statutory useful life, financing may be refused entirely.
Key Points When Choosing Wooden Properties
Verify Past Renovation Work
Properties that have been properly and regularly maintained present fewer concerns about durability. However, properties with a history of renovations due to rain leaks or water leaks may have underlying structural deterioration, so verifying the details of past renovation work is important.
Verify Seismic Standards
Properties built before 1981 are likely to meet only the old seismic standards, which creates restrictions on the use of home loans and home loan deductions. Choosing properties that comply with the new seismic standards (from June 1981 onward) increases investment safety.
Statutory Useful Life by Construction Type
| Construction Type | Statutory Useful Life |
|---|---|
| Wooden / synthetic resin construction | 22 years |
| Wooden mortar construction | 20 years |
| Steel construction (thickness over 4 mm) | 34 years |
| RC / SRC construction | 47 years |
Related Reading
Frequently Asked Questions (FAQ)
Q. What is the statutory useful life of wooden buildings?
Wooden and synthetic resin construction is 22 years; wooden mortar construction is 20 years. These are the depreciation periods under tax law and differ from the physical lifespan of the building.
Q. Are wooden properties that have exceeded their useful life viable investment targets?
Since depreciation cannot be used and financing is difficult, the risks are higher. In some cases it may work as a strategy to pursue high yields through cash purchase, but the exit strategy must be carefully designed.
Q. How can depreciation be used for tax savings?
Depreciation expenses can be deducted from real estate income as expenses. For those with employment income, if real estate income results in a loss, it can be offset against employment income, reducing income tax.
Q. Can the home loan deduction be used for properties built under old seismic standards?
It can be used if seismic retrofitting work is carried out and certain requirements are met. However, the cost-effectiveness of the retrofit work must be carefully examined.
