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How Can Renovation Investment in Used Homes Increase Asset Value? Recommended Methods and Risks

This article explains the appeal of renovation investment in used homes, including practical methods such as seismic reinforcement, insulation upgrades, and layout changes, as well as their effect on yield improvement. It also examines why this approach is attracting attention as a new option in real estate investment.

Last updated: About 2 min read

As acquiring newly built properties becomes more difficult, "renovation investment," which involves purchasing existing homes and renovating them, is attracting attention as a strong option in real estate investment. This article explains the advantages of renovating existing homes, specific renovation methods, and practical points for investors.

What makes renovation investment in existing homes attractive?

Well-located properties can be acquired at lower cost

Existing homes can be purchased at a lower price than newly built properties, and there is potential to find well-located assets at attractive valuations. Because existing properties were built before newer developments, some may stand in locations with greater convenience and stronger long-term appeal.

Renovation can reposition a property into a more competitive asset

By allocating the savings in acquisition cost to renovation, investors can transform a property into a highly competitive rental asset with popular layouts and facilities. This is also effective in reducing the risk of rent declines.

What can be achieved through renovation?

① Seismic reinforcement

Homes built under the old seismic standards before June 1981 require reinforcement to withstand major earthquakes. Seismic upgrades improve safety and also strengthen the property's appeal to tenants.

② Thermal insulation upgrades

By replacing insulation in walls, floors, and ceilings or switching to double glazing, investors can create a comfortable living environment throughout the year. Better insulation performance also helps reduce utility costs and improve tenant satisfaction.

③ Floor plan changes

Older compartmentalized layouts can be converted into open LDK designs to provide a more modern living space. Incorporating popular features such as open kitchens and island kitchens is also effective in addressing vacancy risk.

④ Upgrading equipment and interior finishes

Adding a camera-equipped intercom, switching to an IH cooking heater, installing a bathroom heating and drying system, and replacing wallpaper can significantly improve both the value and appeal of a property.

What is the best renovation strategy for real estate investment?

  • Clearly define the target tenant segment before deciding on the renovation scope
  • Avoid overinvestment and build a renovation plan with a strong focus on cost-effectiveness
  • Protect long-term asset value by prioritizing reinforcement of "invisible" areas such as seismic performance and insulation
  • Interior finishes that reflect current preferences, such as white-toned wallpaper and Scandinavian-style design, can also appeal to younger tenants

Frequently Asked Questions (FAQ)

Q. Which is more advantageous: renovation investment or new-build investment?

Because acquisition costs are lower, renovation investment can make it easier to target higher yields, but there is also a risk of unexpected repair costs. The condition of the property and the precision of the business plan are critical.

Q. What is the typical budget for renovation costs?

For a full skeleton renovation (complete interior demolition), a general benchmark is around 5 million to 10 million yen per unit. If only the interior finishes are being updated, projects may be possible from around 1 million to 3 million yen.

Q. Is financing available even for properties built under the old seismic standards?

Financing generally becomes easier if seismic retrofitting is completed and a certificate of compliance with seismic standards is obtained. It is advisable to consult with financial institutions before purchase.

Q. What should investors watch for when renting out a property after renovation?

It is important to confirm that the renovation scope aligns with the needs of the target tenant segment. Compliance with the Building Standards Act and fire regulations must also be checked.

Daisuke Inazawa, President & CEO of INA&Associates Inc.

Author

President & CEOINA&Associates Inc.

President & CEO of INA&Associates Inc. Leads real estate brokerage, rental leasing, and property management across Greater Tokyo and the Kansai region. Specialises in income-property investment strategy and advisory for ultra-high-net-worth individuals.

Daisuke Inazawa is the President and CEO of INA&Associates Inc., a Japanese real estate firm headquartered in Osaka with a Tokyo branch. He leads the company's three core businesses — real estate sales brokerage, rental leasing, and property management — across the Greater Tokyo Area and the Kansai region.

His areas of expertise include investment strategy for income-generating real estate, profitability optimisation of rental operations, real estate advisory for ultra-high-net-worth individuals (UHNWIs) and institutional investors, and cross-border real estate investment. He provides data-driven, long-horizon advisory to investors in Japan and overseas.

Under the management philosophy "a company's most important asset is its people," he positions INA&Associates as a "people-investment company" and is committed to sustainable corporate-value creation through talent development. He also writes and speaks publicly on leadership and organisational culture in times of change.

He has passed eleven Japanese professional qualification examinations: Licensed Real Estate Broker (Takken), Certified Real Estate Consulting Master, Licensed Condominium Manager, Licensed Building Management Supervisor, Certified Rental Housing Management Professional, Gyōseishoshi Lawyer (administrative scrivener), Certified Personal Information Protection Officer, Class-A Fire Prevention Manager, Certified Auctioned Real Estate Specialist, Certified Condominium Maintenance Engineer, and Licensed Moneylending Operations Supervisor.

  • Licensed Real Estate Broker (Takken)
  • Certified Real Estate Consulting Master
  • Licensed Condominium Manager
  • Licensed Building Management Supervisor
  • Certified Rental Housing Management Professional
  • Gyōseishoshi Lawyer (Administrative Scrivener)
  • Certified Personal Information Protection Officer
  • Class-A Fire Prevention Manager
  • Certified Auctioned Real Estate Specialist
  • Certified Condominium Maintenance Engineer
  • Licensed Moneylending Operations Supervisor