Reading a VEFA Off-Plan Contract in Nice: Spotting Non-Conformities at Handover

EXPERTISE — VEFA

You’ve just picked up the keys to your new apartment in Nice. You’re holding the VEFA off-plan drawings, comparing them to what’s actually in front of you. Something feels off. And frankly, that’s common: of the 15,000 annual handovers across the PACA region, nearly 30% show significant discrepancies between the contractual plan and the delivered apartment. What you do instinctively – measuring a room with a tape, checking a ceiling height – isn’t enough. Why? Because reading a VEFA plan technically, and qualifying a non-conformity, relies on precise rules, legal tolerances and expert measurement methods.

What you see — and what it’s really hiding

You notice the living room looks narrower than on the plan. You measure it: 4.85 m instead of the 5.00 m stated. A 15 cm difference. Is that serious? Here’s what nobody tells you: a VEFA plan isn’t a photograph — it’s a graphic representation subject to execution and scale tolerances. The NF EN ISO 5455 standard, which governs technical drawing, sets rules for graphic precision. At the standard 1/100 scale used for apartment plans, the graphic reading tolerance is ±0.5 mm on paper, i.e. ±5 cm in real life. Your 15 cm gap already exceeds that margin. But that’s just the surface reading. It’s not unusual to measure an apartment where a discrepancy in the living room’s width actually concealed a misplaced load-bearing wall, shifting the geometry of every adjoining room and affecting the routing of technical ducts.

The calculation that reveals the non-conformity

To qualify the discrepancy, you don’t just look at the absolute difference — you weigh it against the contractual dimension and compare it to accepted tolerances. The formula is simple: relative discrepancy ε = |(L_actual − L_plan) / L_plan| × 100. Take your living room in Nice: L_plan = 5.00 m, L_actual = 4.85 m. So ε = |(4.85 − 5.00) / 5.00| × 100 = 3%. Under Article L. 261-1 of the French Construction and Housing Code, the developer is required to deliver a building that matches the contract. Case law, drawing on established standards of practice (such as NF EN ISO 5455 for drawing precision), generally holds that a discrepancy exceeding 2% on a primary dimension (such as a living room’s size) is significant and may constitute a non-conformity. Here, 3% > 2%. What this means in practice: your 15 cm gap isn’t a simple execution tolerance — it’s a substantial divergence from what was sold. On the French Riviera, where price per square metre runs high, a gap like this represents a meaningful loss of usable, sellable floor space.

What happens if you do nothing

You sign off on the snag list thinking 15 cm isn’t a big deal. That’s a mistake. First, this kind of gap is often a symptom of other issues you can’t see: a wall that’s slightly out of true, which will complicate fitting your custom-built kitchen later. In 6 months, you may struggle to install furniture built to the original dimensions. In 2 years, the resale value of your property in Nice could be affected during a Carrez surface-area survey. Worse, if the gap stems from a structural shift, secondary defects can appear over the medium term: cracks on either side of the wall, waterproofing issues if the façade line was altered. What does it cost to fix later? Repositioning a load-bearing wall and redoing the finishes runs into several thousand euros — not counting the disruption of works in a home you’re already living in. What I see time and again is developers banking on buyer fatigue. They downplay the gap, calling it « standard tolerance. » But the law and the NF EN ISO 5455 standard, section 4.4 on dimensional tolerances, are clear.

Remedies and guarantees: what you’re entitled to demand

You’re not without recourse. The parfait achèvement (perfect completion) guarantee applies. Concretely, faced with a confirmed non-conformity like this 3% gap on the living room’s dimension, you need to act. The process is clearly defined: send a precise notice of reservations by registered letter with acknowledgment of receipt to the developer, citing Article L. 261-1 of the CCH and pointing out the breach of NF EN ISO 5455 tolerances. If the developer disputes it, bring in an independent expert — like us, here in Nice — for a joint measurement using a calibrated laser distance meter, an instrument accurate to ±1.5 mm, far more precise than a tape measure. Their report will carry evidentiary weight. If the deadlock continues, the Nice judicial court has jurisdiction. The expert assessment will establish the discrepancy, its significance, and let you demand corrective works or compensation for the loss of value and enjoyment. Don’t let this slide. Your VEFA plan is a contract. What’s delivered has to match it.

Frequently Asked Questions

What’s the deadline to challenge a VEFA non-conformity in Nice?

You have until the handover date — when you sign the delivery report — to raise reservations. After that, it becomes much harder to have discrepancies recognised. In practice, bring in a building expert before signing to identify non-conformities.

How much does a VEFA expert assessment cost to detect non-conformities in Antibes?

A VEFA expert assessment typically costs between €400 and €800 for a standard apartment, depending on size and complexity. This covers laser measurements, comparison against the contractual plan, and a detailed report. It’s a modest investment given the financial stakes of a property on the French Riviera.

What should I do if the gap between the VEFA plan and reality exceeds 2%?

If the relative discrepancy exceeds 2% on a primary dimension, such as a living room’s width, you’re entitled to refuse delivery or request a price reduction. Record your reservations in writing on the delivery report and bring in an expert to support your case. In disputes, case law often treats this threshold as significant.

What are the legal tolerances for VEFA surface areas in Nice?

There’s no single legal tolerance, but the NF EN ISO 5455 standard sets a graphic reading tolerance of ±5 cm at 1/100 scale. Beyond that — and especially if the relative discrepancy exceeds 2% on a main room — it may constitute a non-conformity. Each case is assessed against the contract and case law.

What if the developer refuses to acknowledge a VEFA non-conformity?

If the developer disputes it, have a bailiff’s report drawn up or request a court-ordered expert assessment. You can also invoke the ten-year structural guarantee if the defect affects the building’s soundness or intended use. As a last resort, legal action for breach of contract is possible, but it’s best handled with a lawyer specialising in off-plan property.

Need an expert? Check out our dedicated page: VEFA Expert Assessment — response within 48h across the Alpes-Maritimes and Var.

📅 Updated 31/07/2026 — By Cassini Expertise, independent building expert covering departments 06 & 83. Free quote: 04 22 46 06 04.

📅 Mis à jour le 26/09/2026 — Cassini Expertise, expert bâtiment indépendant (06·83·13·40).