When I bought my third rental property back in the day, I paid full new-build price for a small apartment building and watched its value drop nearly 15% the moment the tenants moved in. My fourth purchase was a 22-year-old resale house that cost 40% less per square meter and has quietly outperformed that new build on cash flow ever since. Nine properties later, I’ve bought both new and used, and the honest answer to “which is better” is: it depends on what you’re optimizing for.
This isn’t a theoretical debate for me. Every yen of the roughly 380 million yen I’ve put into property over 15 years came from weighing exactly this trade-off, so let me walk through what actually matters when you’re staring at a new-construction brochure next to a 25-year-old resale listing.
The depreciation cliff is real, and it hits new builds hardest
ud83duded2 RECOMMENDED ON AMAZON US
Real Estate Investment Books
The books that changed how I think about money, leverage, and long-term wealth.
Japanese property valuations are brutal to new construction. A wooden-frame house is typically depreciated on paper to near-zero value in about 22 years, and reinforced concrete buildings get roughly 47 years. What that means in practice is that a brand-new house loses a huge chunk of its resale value the moment you sign the deed u2014 I’ve seen figures as steep as 20-30% in the first few years alone. Meanwhile, a house that’s already 20 years old has absorbed most of that cliff before you ever bought it, so your downside from here is much shallower. On one of my resale purchases, the seller had already eaten a 60% value drop from its original new price over two decades, and I picked it up near the bottom of that curve.
Yield math almost always favors resale
ud83duded2 RECOMMENDED ON AMAZON US
Financial Calculators for Investors
Run yield and cash-flow calculations in seconds u2014 worth every yen on your first deal.
New construction in Japan typically rents for a premium of maybe 10-15% over comparable older units in the same neighborhood, but the purchase price premium is usually far larger than that u2014 often 40-50% or more. Run the numbers and the gross yield on new builds in my area tends to land around 4-5%, while well-chosen resale properties routinely hit 8-10%. I bought one resale duplex for 9.8 million yen that nets about 780,000 yen a year after basic expenses u2014 call it an 8% gross yield u2014 something I’ve never matched on a new-build purchase. If cash flow is your goal rather than prestige or low maintenance, the math points toward resale almost every time.
What new construction actually gets you
- Full manufacturer or builder warranties, typically covering structural elements for 10 years by law
- Modern earthquake resistance standards (anything built after the 1981 and especially 2000 building code revisions is meaningfully stronger)
- Zero deferred maintenance for the first 5-10 years u2014 no surprise roof or plumbing bills
- Easier financing, since banks often offer better loan-to-value ratios and lower rates on new builds
- Higher tenant appeal in competitive rental markets, which can mean shorter vacancy periods
That warranty and code compliance point matters more than people give it credit for. I had a 1975-built property where retrofitting it to a reasonable earthquake standard cost about 1.2 million yen u2014 money I never would have spent on a post-2000 build. If you’re risk-averse or don’t want to personally manage renovation work, new construction buys you real peace of mind, even at the higher price.
Where resale properties bite you back
ud83duded2 RECOMMENDED PRODUCTS
Investment Analysis Templates
Spreadsheet analysis is the difference between a good deal and a disaster.
I won’t pretend resale is free money. My oldest property needed a full roof replacement within two years of purchase, which ran about 1.8 million yen u2014 money that ate most of that year’s cash flow. Older buildings also tend to have outdated plumbing (galvanized pipes instead of modern resin), less efficient insulation, and sometimes murky repair histories if the previous owner wasn’t diligent about maintenance records. You have to budget for this. My rule of thumb on any resale purchase over 15 years old is to set aside at least 10% of the purchase price as a renovation reserve before I even close the deal.
How I actually decide between the two
I look at three things every time: the price gap versus a comparable new unit, the remaining structural life relative to my holding period, and how much renovation work I’m personally willing to do. If I plan to hold a property for 10 years and the resale price is 40% lower with 30+ years of structural life left, resale wins easily. If a property is already near the end of its depreciation schedule and financing gets difficult as a result, that tips things back toward new construction or a more recent build. Location within Tokyo’s 23 wards versus the surrounding prefectures also shifts the calculation, since land value holds up regardless of the building’s age, and land is often the bigger part of the price in central areas anyway.
A quick gut-check before you buy
Before any purchase, new or resale, I run through the same short list, and it’s saved me from at least two bad deals over the years:
- Confirm the exact building age and construction method (wood, steel, or reinforced concrete)
- Check remaining loan years the bank will approve u2014 older buildings often get shorter terms
- Get a rough renovation estimate from a contractor before making an offer, not after
- Compare rental listings within 500 meters to sanity-check the rent assumption
- Calculate gross yield after realistic vacancy of at least 1 month per year
Neither option is universally correct, but for pure investment returns, the numbers have leaned resale for me across the majority of my nine properties. New construction has its place when you want predictability and can accept a lower yield for it. That’s the calculation I run every single time before I sign anything, and it’s kept my portfolio cash-flow positive for over 15 years.
Property Cash Flow Calculator + Complete Guide
The exact Excel spreadsheet I use for every property purchase decision u2014 5-year projection, yield calculation, and break-even analysis included.
ud83cudfe0 More from DIY Father
15 years of landlord experience u00b7 3 apartment buildings u00b7 DIY renovations that saved millions of yen. Browse all articles at diytosan.com
