Buying a new-build apartment in Belgium: complete guide

The purchase of a new-build apartment in Belgium takes place in 80% of cases as VEFA (Sale in the Future State of Completion) or « off-plan apartment »: you sign before the property is built, you pay in instalments as construction progresses, and you take delivery upon completion. This mechanism, framed by the Breyne Law of 9 July 1971, offers strong protections — provided you carefully read the contract and verify the developer’s solidity. This guide sets out the 2026 steps, the preliminary checks, the costs to anticipate and the pitfalls to avoid before committing to a new apartment belgium.

The VEFA mechanism in practice

The vefa apartment rests on a precise sequence. Step 1: signature of a preliminary sale agreement or a reservation, with a down payment capped at 5% maximum. Step 2: visit to the notary for the authentic sale deed, triggering balance payment in instalments according to progress (Article 9 Breyne Law). Step 3: execution of works with payments at each key stage (foundations, weather-tight shell, roof, finishes). Step 4: pre-completion visit then provisional reception, activating post-reception warranties. Step 5: one year later, final reception and release of the security deposit.

Throughout this sequence, the buyer benefits from protections: Breyne Law security deposit of 5% blocked at the notary, completion guarantee, mandatory contract clauses (Article 7), prohibition of abusive clauses. See Breyne Law VEFA for the full regime.

Verifying the developer’s solidity before signing

The developer is the central link in the vefa apartment. In the event of default, the Breyne Law security deposit and completion guarantee protect the buyer, but experience shows that the first safeguard remains signing with a solid operator. The preliminary checks the firm systematically performs:

• Company seniority: minimum 5 years of activity, ideally 10 years, with verifiable references (delivered programmes, post-delivery photos).
• Financial solidity: balance sheets published at the CBE, liquidity and solvency ratios, no recent collective procedure. The company number is public at kbopub.economie.fgov.be.
• Ongoing litigation: search at the Belgian Official Gazette and at the commercial courts.
• Issued planning permit: verify the date and validity before any commitment.
• Breyne Law security deposit actually constituted: demand the certificate before any payment, including reservation.

Critical reading of the Breyne Law contract

The VEFA contract must include the mandatory clauses of Article 7 Breyne Law: full and final price, plans and specifications annexed, start and end execution dates, capped price revision formula (80% maximum of index fluctuation), date of scheduled payments, delay compensation clauses. See Article 7 Breyne Law and our Breyne Law sale contract.

Sensitive points regularly renegotiated by the firm:

• Delay clauses: mandatory lump-sum penalties for late delivery over 30 days.
• Specification changes: conditions for material substitution by equivalents.
• Co-ownership share: compliance with the master deed, forecast charges, post-intervention file.
• Common areas: technical description, expected state at reception. See common-areas reception.

Case study: 3-bedroom VEFA apartment in Brussels

Case file accompanied in 2024: couple buyers, 3-bedroom apartment 105 m² + 12 m² terrace in Schaerbeek, advertised price €425,000 VAT included.

Audit of the agreement revealed: (1) unplafonned price revision (clause renegotiated to 80% compliant with Article 7), (2) absence of quantified delay penalties (set at 0.1% per calendar day beyond 30 days), (3) common areas described too generically (descriptive annex redrafted with the developer), (4) forecast co-ownership charges not provided (budget annex obtained). The reservation deposit was suspended pending constitution of the 5% security deposit.

At provisional reception (16 months after signature), 38 reservations were entered on the minutes, including 7 major ones (terrace water-tightness, tile alignment, acoustic insulation defect). All lifted within 9 months thanks to the pressure of contractual penalties. The client avoided an estimated budget overrun of €14,000 and likely legal proceedings.

Pitfalls to avoid

• Paying any down payment before the security deposit: prohibited by the Breyne Law. Demand the nominative certificate.
• Signing without reading the plans and specifications annexed: they prevail over commercial brochures.
• Accepting the developer’s notary without your own: it’s free for you, and only your notary represents you.
• Skipping the pre-completion visit: 3 to 4 weeks before delivery, a visit allows signalling defects still easily correctable.
• Rushing through the provisional reception: it triggers warranty of perfect completion, two-year warranty and ten-year liability. See provisional reception checklist.
• Failing to verify the EPC and RGIE at delivery: a non-compliant apartment cannot be received without reservations.

Securing a VEFA purchase

A VEFA purchase mobilises on average €350,000 to €600,000 in Brussels, €250,000 to €450,000 in Wallonia. An audit of the contract and specifications (€1,500 to €2,500) makes it possible to identify risk clauses and renegotiate before signing. The firm Mon Etat Des Lieux intervenes at every stage: contractual analysis, pre-completion visit, provisional reception support, monitoring of reservation lifting.

For a personalised audit of your new-build apartment purchase file, request a free quote or consult our Breyne Law support service. See also new-build apartment for sale and turnkey new apartment for other formulas.