Home improvement scams: five traps homeowners should avoid

The neighbour rang one Tuesday morning, irritated once again. A man had told him that his roof “could collapse at any moment” after spotting two displaced tiles from the street. Twenty minutes later, an €8,900 quote was sitting on the kitchen table, complete with a discount valid “today only”. Many homeowners will recognise this situation, particularly when a leak, an ageing boiler or high energy bills have already created anxiety. Home improvement scams do not target gullible people: they exploit moments when people want a problem fixed quickly. Their tactics have also become more sophisticated.

The five traps most commonly reported

The first, and most obvious, trap is fear-based doorstep selling involving roofs, façades, gutters or supposedly dangerous trees. A tradesperson calls without an appointment, claims to have identified an urgent issue and offers to start straight away. The DGCCRF regularly warns about these fear-driven scenarios: a broken tile becomes a roof structure at risk, while a damp patch is portrayed as a major health hazard. The pitch is polished, brisk and initially almost reassuring. Then the pressure begins. A genuine technical emergency can, however, withstand a few hours of checks.

The second trap concerns energy-efficiency renovation work and public grants. Insulation for “one euro”, a heat pump supposedly funded in full, or a MaPrimeRénov’ application presented as guaranteed: offers that seem too good to be true should remain a warning sign. Some salespeople adopt an official appearance, use institutional logos or claim to be calling “on behalf of the State”. They may also cite an RGE qualification that does not exist, has expired or is not appropriate for the work being offered. The RGE label must be checked on the official directory, company by company and activity by activity.

The third trap lies in a quote that appears comprehensive at first glance but is not. Its items are vague, materials are not specified, quantities are missing, and potential travel or removal costs only emerge after signing. Extras then follow: “we found a problem”, “that was not included”, “we need to order something else”. The DGCCRF stresses that an accepted quote commits both parties. A reputable professional sets out the work, price, timescales and payment terms before work begins.

From a missing deposit to hidden credit: details that should raise concerns

The fourth trap involves paying a large deposit too early, sometimes in cash, to a company that then becomes hard to trace. The request is usually supported by a practical-sounding reason: reserving materials, securing a work team or benefiting from a supplier price. Let us be honest: nobody checks a company’s details every day. Yet, before making any payment, a few minutes are enough to verify its SIREN number, address, legal existence and reviews, while remaining sceptical of those that look too perfect.

The fifth, more subtle, trap concerns finance. A home improvement order form may conceal an application for tied credit, sometimes presented as nothing more than a payment facility. The customer believes they are signing for insulation or a boiler; they later discover monthly repayments, an interest rate and a commitment period whose implications they had not properly understood. Sales pressure plays a major role: “sign now, you will have time to read it at home”. No. A contract deserves to be read calmly on the spot, even if the person opposite sighs.

When faced with a persistent offer, the most useful response is to pause the decision: ask for a dated quote, compare it with at least one other company, and never let a document leave without keeping a copy. Being cautious is not a sign of distrust; it is normal protection when several thousand euros are at stake.

“A reliable professional accepts that a customer needs time to check, compare and think.”

• Refuse imposed urgency from an unknown person arriving without an appointment.
• Check the SIREN number, ten-year liability insurance and, for energy-efficiency renovation work, the relevant RGE qualification.
• Insist on a detailed quote before any work starts.
• Avoid cash payments and retain every written exchange.
• Read every credit offer, including the small print and the total amount payable.

When doubts arise, slowing down is better than regretting it

In these situations, the hardest part is not always spotting a fake company. It is recognising the feeling of unease when it appears: the overly insistent salesperson, the quote that cannot properly be reviewed, the promise of support that seems to come from nowhere. Many victims say they sensed that something was wrong but did not dare stop the conversation. They feared appearing distrustful, or simply wanted the problem to go away. That is human.

The DGCCRF encourages consumers to report suspicious practices through SignalConso, especially when a professional uses misleading methods, refuses to provide the expected documents or fails to honour their commitments. In cases of doorstep selling, consumer-protection rules are strict and a cancellation right may apply, depending on the circumstances. Keeping quotes, photographs, text messages, invoices and the company’s contact details can make all the difference if a dispute arises a few weeks later.

There is also a simple truth: a well-prepared project rarely starts with a rushed signature on the corner of a table. A relative can review a quote, a neighbour may recommend a tradesperson they have genuinely seen at work, and a town hall or a France Rénov’ information centre can direct people towards trustworthy information. These steps do not guarantee everything, but they break the isolation on which fraudsters rely. Sharing a bad experience, even an embarrassing one, may prevent someone else from falling into the same trap.

Key point	Detail	Value for the reader
Fear-based doorstep selling	An emergency is declared without a proper assessment or prior appointment.	Helps people step back before agreeing to costly work.
Fake grants and false labels	Promises of full funding, misused official logos or an unchecked RGE qualification.	Helps verify genuine eligibility before signing.
Opaque quotes and finance	Unclear amounts, unexpected extras, an excessive deposit or concealed credit.	Reduces the risk of overpaying or committing for several years.