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What Are the Downsides of Renovation Investment? How to Understand Costs, Timing, and Risk Early

This guide explains the drawbacks of renovation investment, including cost overruns, schedule delays, and durability risks. Before pursuing returns through older properties, investors should understand the practical risk-management points that matter most.

Last updated: About 2 min read

Renovating a pre-owned property is attracting attention as a real estate investment approach that can add value while keeping acquisition costs under control. However, if a project is planned without fully understanding the risks that differ from new construction or a simple remodel, it can lead to unexpected overruns in both cost and schedule.

What Is Renovation? Differences From Remodeling and New Construction

Renovation isthe large-scale renewal of interior finishes, layout, and building systems while making use of the original structure of an existing building (beams, columns, and foundation). While remodeling usually means relatively minor interior-only work, renovation is a medium-scale project that may also include layout changes. Unlike rebuilding as new construction, it reuses structural elements that can still be utilized.

CategoryConstruction ScaleLayout ChangesIndicative Cost
RemodelingSmallGenerally not possibleLow
RenovationMediumPossibleMedium to high
Rebuild as new constructionLargeFully custom designHigh

What Are the Drawbacks of Renovation Investment?

The following three points are the main drawbacks and should be addressed during the planning stage.

The construction period may be longer than expected

When reusing an older building,there may be dimensional inconsistencies that standard components cannot accommodate, or deformation of the foundation caused by ground settlement. If corrosion is discovered after demolition, reinforcement work may need to be added, and it is not uncommon for the entire plan to change significantly. It is important to assume that the schedule may be longer than for a new-build project that can rely on factory-standardized production.

There is a risk that costs will exceed the budget

In older buildings, it may be necessary to source custom materials that are no longer commonly available. In addition,if further deterioration or corrosion is discovered after work begins, additional repair costs will arise, and in many cases the final amount materially exceeds the original estimate. It is strongly recommended to set aside an additional contingency of 10 to 20% of the estimate. Specialist contractor costs for plumbing, electrical, and gas piping and wiring work that cannot be handled by non-professionals should also be budgeted separately.

Durability and regulatory risks remain

In older properties, deficiencies in seismic performance or fire protection systems may be identified.If it becomes clear during construction that seismic reinforcement or additional fire protection systems are required, materials, schedule, and costs will all increase. Buildings that fall under older seismic standards may also face stricter loan screening.

Practical Steps for Successful Renovation Investment

Decide in advance how the property will be used after renovation

Before construction starts, decide whether the property will be rented out, sold, or owner-occupied after completion. If work proceeds without a clear end use, it becomes difficult to optimize specification levels and layout design, reducing the return on investment.

Consider subsidies and crowdfunding

Some municipalities offer subsidy programs for renovating traditional houses or vacant homes. Researching local subsidies and crowdfunding in advance as financing options for possible additional costs can broaden your choices.

When assessing the profitability of a renovated property,the relationship between rent setting and asset valueshould be understood before making an investment decision. For exit planning,an exit strategy in an era of inflation and rising construction costsis also worth reviewing.

Frequently Asked Questions (FAQ)

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

It depends on the location, the condition of the property, and the market environment. Renovation investments often produce a higher gross yield because acquisition costs are lower, but it is important to compare them on a net basis after properly estimating the risk of additional costs.

Q. Who bears responsibility for defects discovered after renovation?

That depends on the contract terms and the specifications documented at the time of purchase. It is advisable to clarify the respective responsibilities of the seller, contractor, and buyer before signing and to confirm the scope of defect liability in writing.

Q. How does renovating a traditional house differ from a typical condominium renovation?

Traditional houses are often built with conventional timber post-and-beam methods and involve many dimensions and materials that modern industrial products cannot easily accommodate. As a result, more manual craftsmanship is required and costs tend to rise. In many cases, ground and foundation investigations are also essential.

Q. Can renovation costs be covered by a loan?

Yes. Some financial institutions offer integrated renovation loans that combine renovation costs with the property purchase loan. Because interest rates and borrowing limits may differ from a standard home loan, it is advisable to compare proposals from multiple lenders.

Q. Is depreciation for a renovated property the same as for a new-build property?

The depreciation period for a used property is often set shorter than for a new-build property, which can increase the initial tax-saving effect. Please confirm the tax treatment with a qualified tax adviser and reflect it in your investment plan.

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