Deductible, but watch out for VAT
The deductibility on real estate work 🛠️ is 100% on the professional part of the expense, quite simply. On the other hand, if you're subject to normal VAT, you never pay VAT to your contractor.
Are you carrying out real estate work and the words "Reverse charge VAT" appear on your contractor's invoice ? This is normal. Instead of paying VAT to the contractor and then reclaiming it (from the VAT authorities when you file your tax return), you pay it directly to the authorities. You owe it and recover it on the same return, so it's neutral for you.
Special cases :
If I'm a VAT franchisee or exempt (medical and paramedical): VAT applies as usual, because you never recover VAT.
If I'm a mixed taxpayer (surgeon with aesthetic services subject to VAT, or physiotherapist with osteopathic services): you don't pay VAT to the contractor. However, when you file your VAT return, you will have to pay VAT according to a pro rata defined on the basis of the breakdown of your income (exempt income vs. income subject to VAT)
💡 In the case of mixed private and professional work, always ask the contractor for two separate invoices. This is because the VAT reverse charge mechanism only applies to the professional part of the building.