6% VAT in construction: conditions to meet in 2026

The reduced rate construction at 6% is the most powerful tax lever to reduce the cost of a new-build or major renovation project in Belgium. On an investment of 300,000 € excluding VAT, the difference between VAT at 21% and VAT at 6% represents 45,000 € in savings — the equivalent of a full personal contribution or a premium kitchen plus a car. But its vat 6 conditions of application are strict, sometimes counter-intuitive, and regularly modified by the annual programme law. The tax administration publishes the exact conditions each year via the official FPS Finance portal, and we summarise here the regimes applicable in 2026.

The conditions of the 6% main residence VAT

The main residence vat reduced to 6% applies primarily in three main cases in new-build construction or major renovation:

Case 1 — Demolition-reconstruction (permanent regime since 2024): the 6% VAT applies to the demolition of an existing building followed by the reconstruction of a single main residence dwelling by the project owner, on the entire Belgian territory (and no longer only in 32 urban zones as previously). Strict cumulative conditions:

• The dwelling must be exclusively or primarily intended as the project owner’s main residence.
• The total habitable surface area may not exceed 200 m² (within the meaning of the VAT Code).
• The project owner must be domiciled there without delay after completion and remain there for at least 5 years.
• The operation is limited to one single dwelling per household.

Case 2 — Renovation of a residential building more than 10 years old: 6% VAT on service provisions (works), subject to conditions of residential purpose and absence of major structural modification changing the use.

Case 3 — Social rental or public operators: specific regimes for public social housing bodies.

For “classic” new-build construction on bare land (without prior demolition), the VAT remains at 21% — except in marginal cases. This is a point often unknown that deserves the utmost caution.

Habitable surface area, main residence: the definitions that count

The 200 m² threshold is not measured intuitively. It refers to the habitable surface area in the fiscal sense, that is to say the net surface of all spaces intended for habitation: bedrooms, living room, kitchen, bathroom, WC, internal passages, integrated office. Excluded are: cellars, unconverted attics, garages, terraces, balconies. A house at 195 m² habitable EPB that adds an office in the converted attic may tip to > 200 m² fiscally and lose eligibility.

The notion of main residence presupposes effective domiciliation (registration in the national register at the address), a majority physical presence, and the tax declaration at this address. A second home, a rental investment, a project resold within 5 years: immediate exclusion, with retroactive regularisation of the differential VAT (21% - 6% = 15%).

To verify your eligibility file by file, the FPS Finance has an advance fiscal ruling service. See also tax advantages of new build for the overall tax overview.

Case study: demolition-reconstruction in Liège

A representative file handled by the firm in 2025: a family acquires a dilapidated house in Liège (1925), value 145,000 €. Complete demolition then reconstruction of a new-build house with 3 bedrooms, 195 m² habitable, completed in 2026 for 295,000 € excluding VAT.

With standard VAT at 21%: 295,000 × 21% = 61,950 € of VAT.
With reduced VAT at 6% (demolition-reconstruction regime): 295,000 × 6% = 17,700 € of VAT.
Net saving: 44,250 €.

Conditions met in the file: prior demolition of an existing building, single main residence (sale of the previous domicile), surface < 200 m², commitment to domiciliation for 5 years. The operation was the subject of a specific declaration to the FPS Finance before the start of the works — a mandatory step that many buyers forget and which can cost them the advantage retroactively.

6% renovation VAT: the conditions for the works

The renovation vat reduced to 6% applies to works of renovation, transformation, improvement or repair of a residential building:

• Minimum age: the building must be at least 10 years old (5 years for demolition-reconstruction).
• Residential use: the property must be mainly assigned to private habitation.
• Eligible services: labour + materials supplied by the contractor within their overall contract. Materials purchased separately by the client remain at 21%.
• Documentation: detailed invoice from the contractor specifying the nature of the works and the eligibility for the reduced rate.

Excluded are: cleaning, current maintenance, professional equipment, certain outdoor development works (swimming pool, tennis court).

Pitfalls to avoid on 6% construction VAT

• Believing that all new-build construction is at 6%: this is false. The standard VAT is 21% except in the case of demolition-reconstruction respecting the conditions.
• Forgetting the prior declaration to the FPS Finance before the start of the works: without it, the advantage is lost and impossible to recover retroactively.
• Exceeding the 200 m² threshold by converting attics or a basement: regularisation at 21% on the whole.
• Reselling within 5 years: mandatory differential VAT regularisation.
• Confusing excluding VAT and including VAT in quotes: a quote of “250,000 € VAT included 6%” assumes validated eligibility. Otherwise, additional cost of 15% on payment.
• Including non-eligible services: luxury equipment, fixed furniture, sometimes at 21% even in an overall site at 6%.

What to check before signing

Eligibility for 6% VAT must be verified and formalised before signing the construction contract or the compromise. A qualification error can represent 30,000 to 60,000 € of tax reassessment. The firm Mon Etat Des Lieux offers a Breyne Law assistance that includes the fiscal check of the file, and a construction audit on the VAT compliance of quotes. Request a free quote within 24 hours to secure your set-up. See also notary fees new build for the non-construction part and price new-build house m² for construction ratios.