Thanks for sharing this—great question. For a personal residence, strategies like cost segregation, 179D, or R&D credits generally don’t apply since they’re designed for income-producing or business-use properties. That said, if you own other properties, or if part of this build will be used for rental, business, or mixed-use purposes, then some of these strategies could become very relevant. The key is whether the property generates income. For anyone else here: consider how a property will be used—personal vs. income-producing—because that’s what determines what tax advantages you can unlock. With the exception of R&D tax credits, which are a true dollar-for-dollar credit, most of these strategies work by creating deductions. Deductions lower your taxable income and are most valuable if you have a current tax liability. R&D credits are different: you don’t need to own property, and even if your business isn’t profitable, you may still benefit through refunds or by carrying the credit forward. Cost segregation and property-based strategies, on the other hand, are powerful tools for owners with taxable income to offset. --------------------------------------------------------------------------------------------------------------------------------------------- In your case Reiko, qualified improvement property (QIP) rules may come into play with construction. Rather than unpack everything here, I’d be happy to discuss your project one-on-one and see where opportunities might exist. Feel free to book a call with me so we can explore this in more detail.