Buying off-plan, or VEFA (Vente en l'État Futur d'Achèvement — sale of a property in its future state of completion), attracts thousands of buyers in France every year. New housing built to the latest energy standards, reduced notary fees of 2–3% compared to 7–8% for existing properties, the ability to customise finishes: the advantages are real. Yet, between signing the reservation contract and taking delivery of an off-plan property, the buyer's journey is riddled with pitfalls that many discover too late. Whether you are considering an apartment in an urban area or a new house in a rural setting, certain mistakes recur systematically and can prove very costly. Here are the five main ones — and, above all, how to avoid them.
The reservation contract (or preliminary contract) is the first legal document you sign with the developer. Many buyers treat it as a mere formality and skim through it. This is a major mistake.
This document sets out the essential conditions of your purchase: a detailed description of the property (living area, number of rooms, floor, orientation), the estimated sale price, the projected delivery date, and any work you reserve the right to carry out yourself (choice of floor coverings, sanitary fittings, paintwork). As stated by the Service-Public.fr website, the preliminary contract must also specify the conditions for recovering the security deposit and the terms of the 10-day right of withdrawal.
In practice, check point by point that what appears in the contract is consistent with the marketing documents (brochure, plans, 3D model) provided by the developer. Any discrepancy — however minor — must be flagged and corrected before you sign. Bear in mind that advertising brochures carry no contractual weight: only the content of the reservation contract is binding on the developer.
Buying off-plan means entrusting your money to a developer for a property that does not yet exist. The question of their financial soundness is therefore crucial, yet it is rarely asked by buyers.
The law requires the developer to provide a completion guarantee (GFA — garantie financière d'achèvement) or, less commonly, a refund guarantee (GFR — garantie financière de remboursement). The GFA ensures that the building will be completed even if the developer runs into difficulties. Demand a copy of this guarantee and verify that it has been issued by a recognised bank or insurer. A VEFA contract lacking this guarantee is simply void under the French Construction and Housing Code (Article L261-10-1).
Beyond the legal obligation, research the developer's track record. Have they already delivered similar schemes? Do they generally meet their deadlines? Delivery delays of 6, 12, or even 18 months are common in the sector. Reviews from previous buyers and publicly available data (annual accounts, company age) provide valuable indicators. Crédit Agricole Immobilier, for example, publishes detailed information about its schemes, allowing prospective buyers to research in advance.
Unlike purchasing an existing property where the price is paid in one go at the notary's office, payment for an off-plan property is spread out in line with construction progress. Article R.261-14 of the French Construction and Housing Code caps payments as follows:
– 35% of the price upon completion of the foundations;
– 70% upon weatherproofing (structural work completed, roof in place);
– 95% upon completion of works;
– the remaining 5% upon delivery, after confirmation of compliance.
The classic mistake is failing to factor interim interest into the financing plan. During construction, your bank releases funds in successive instalments. However, between the first drawdown and moving in, you pay interest on the amounts already disbursed, without yet living in the property. If you are also renting elsewhere, you therefore bear both rent and interim interest throughout the entire construction period — a financial burden that can last 18 to 24 months.
To avoid unpleasant surprises, ask your bank for a full simulation including interim interest, borrower's insurance, and the total cost of credit based on the developer's projected schedule. Any construction delay will mechanically upset this financial balance.
Delivery is the moment when the developer hands over the keys to your new home. It is also your only opportunity to officially verify that the property complies with the sale contract. An inspection rushed through in 20 minutes is an open door to future unpleasant surprises.
During this visit, you must check every element: floor and wall coverings, operation of joinery (doors, windows, shutters), electrical installation (sockets, switches, consumer unit), plumbing, compliance of sanitary fittings, absence of cracks or signs of damp. Bring a tape measure to check dimensions and a spirit level to verify that walls are plumb.
If you identify defects, poor workmanship, or non-conformities with the specifications set out in the contract, record them in the delivery report as reservations. You then have an additional one-month period after the handover of keys to notify, by recorded delivery letter, any anomalies you did not spot on the day. The developer then has one year (perfect completion guarantee) to carry out repairs. Until the reservations are lifted, you may place the remaining 5% of the sale price in escrow with the Caisse des Dépôts or a notary.
A practical tip: bring a building professional with you (architect, project manager) or a judicial officer. The cost of this assistance (a few hundred euros) is negligible compared to the financial stakes involved.
Suspensive conditions are clauses that protect you by making the sale contingent on the occurrence of certain events. The best known is the mortgage approval suspensive condition: if your bank refuses the financing, the sale is cancelled and your security deposit is returned in full. This clause is in fact mandatory whenever the purchase is financed by a loan.
However, other conditions are worth considering on a case-by-case basis. Are you planning to finance part of the purchase through the prior sale of another property? Include a clause linked to the completion of that transaction. Are you buying a property intended for professional use (holiday cottage, bed and breakfast)? Insert a condition tied to obtaining the necessary administrative authorisations. If you wish to explore the question of suspensive conditions in the context of a property transaction, we recommend reading our article the 5 key points of the preliminary sale agreement for buyers.
Also be mindful of the withdrawal period. After receiving the reservation contract by recorded delivery, you have 10 calendar days to withdraw from your commitment without justification and without penalty. Once this period has passed, only the suspensive conditions will allow you to withdraw without forfeiting your security deposit. Never sign under pressure from a sales argument such as "only two units remaining".
Beyond these five mistakes, buying off-plan requires constant vigilance at every stage. Bear in mind that the security deposit paid at reservation is capped by law: 5% of the sale price if the final deed is signed within one year, 2% if signed within one to two years. Any request exceeding these amounts should raise a red flag. To better understand the mechanisms of the security deposit, consult our dedicated article: security deposit on a preliminary sale agreement: mandatory or negotiable?
Also remember to visit the construction site regularly (under conditions permitted by the developer) and to keep all written exchanges in their entirety: letters, emails, and meeting minutes. In the event of a dispute, this paper trail will be your greatest asset.
Finally, do not forget that purchasing a new off-plan property entitles you to three major construction warranties: the perfect completion guarantee (1 year), the two-year guarantee covering separable equipment elements, and the ten-year structural guarantee protecting the soundness of the building and its integral elements. These protections are valuable, but you must know how to activate them at the right time and in the required manner.
Buying off-plan remains an excellent way to access a high-performing, personalised new home — provided you do not confuse enthusiasm with haste, and surround yourself with the right advice at every step of the process.
