Two regimes, two logics
| Renovation | Demolition and rebuild | |
|---|---|---|
| Object | works on an existing building | complete demolition then rebuilding |
| Main condition | dwelling occupied for at least ten years | social conditions on the rebuilt dwelling |
| Floor area condition | none | yes, with a ceiling |
| Occupation condition | use as private housing | domicile for a minimum period |
The first regime is covered in the article on reduced VAT and its conditions.
The second imposes so-called social conditions, markedly more demanding, in exchange for applying to entirely new works.
The social conditions for a private client
They apply to someone having a dwelling demolished and rebuilt for themselves, and they are cumulative. The conditions are checked before demolition.
A sole and own dwelling, meaning the client owns no other housing.
A total habitable floor area not exceeding 200 m².
A domicile requirement of at least five years, the dwelling having to be occupied as principal residence over that period.
This regime applies across the whole of Belgium and has been in force unchanged since 1 January 2024.
The difference in threshold between works and sale
This is the trickiest point, and it is recent. It concerns the floor area condition for the rebuilt dwelling.
Since 1 July 2025, the sale of a dwelling rebuilt after demolition may also qualify for the reduced rate, notably in development operations.
But the floor area ceiling is not the same: it is 175 m² on delivery, against 200 m² for works ordered directly by a private client.
The same dwelling may therefore qualify if built to order and not if purchased, at an identical area falling between the two thresholds.
Three uses are accepted for the purchaser: personal occupation as sole and own dwelling, private letting with the tenant establishing domicile, or letting with a social purpose.
In that last case the floor area limit does not apply, which clearly distinguishes social investment.
Long-term letting
A distinct regime, aimed at rental investment. It targets long-term letting.
Where a client builds in order to let long term, the reduced rate may apply under conditions, including an obligation to maintain the letting until 31 December of the fifteenth year following that of first occupation. The letting undertaking conditions the regime.
That is a commitment of considerable duration, to be built into the asset strategy before the operation rather than after.
A relaxation for couples
A favourable development worth knowing.
The administration previously took the view that a couple could benefit from the reduced rate only if neither partner owned other housing, which automatically excluded the couple as soon as one was already an owner.
That principle has been relaxed. Eligibility is now assessed individually, including where property is acquired or built jointly.
In practice, if one partner owns no other housing and meets the other conditions, their share in the project may benefit from the reduced rate.
The trap of calculating floor area
The commonest ground of reassessment under this regime. It concerns failure to honour the undertaking given.
Habitable floor area is not limited to the obvious living rooms. Converted lofts, mezzanines and converted cellars may be counted and push the project over the ceiling.
The calculation must therefore follow the applicable definition, not an estimate, before committing to the regime.
Any excess, however small, moves the whole operation to the full rate, which represents a considerable difference on a new build.
What this means for a professional
Four rules.
Identify which of the two regimes applies, renovation and demolition-rebuild not sharing conditions.
Check the applicable threshold, which differs between ordered works and a sale.
Have the habitable area calculated to the applicable definition, including converted volumes.
Inform the client of the duration commitments, domicile or maintained letting, which bind them long after construction.
This article reflects the position of the rules at the date of checking and serves professional orientation. It does not constitute tax advice and does not replace consulting the competent administration.