Buying real estate commits you for several years, sometimes several decades. Before signing anything, the solidity of the project relies on three pillars: the quality of the financing file, knowledge of recent regulatory constraints, and the ability to anticipate costs that no one details in an advertisement. Here are the concrete points that make the difference between a controlled purchase and a project that goes off the rails.
Energy class of the property: the regulatory trap to check before any offer
Have you spotted an old apartment at an attractive price? Before you get ahead of yourself, check the letter on the energy performance diagnosis. A property rated F or G does not only pose a thermal comfort problem: it brings legal obligations that can turn a good deal into a financial pit.
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Since the regulatory changes to the DPE published between 2024 and 2025, the most energy-consuming properties are gradually banned from being rented. If you are buying for a rental investment, a property rated G may become impossible to rent without prior energy renovation work.
For a primary residence, the problem is different but real. The costs of bringing it up to standard (insulation, changing the heating system, ventilation) weigh heavily on the total budget. Many buyers calculate the purchase price, notary fees, and loan costs, but forget to include the energy renovation bill in their financing plan.
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In concrete terms, request the complete DPE before the first visit. Identify the necessary work to achieve at least class D. Get a quote for this work from a contractor before making your offer. This amount should be included in your overall budget calculation, just like agency or notary fees. Resources like https://www.pratiqueimmo.fr/ help structure this analysis in advance and avoid unpleasant surprises after signing the preliminary agreement.
Mortgage application: what banks really look at in 2025
The recent drop in interest rates has restored purchasing power to borrowers. But this improvement masks a less visible reality: banks are more selective about the quality of applications than they were a few years ago.
The High Council for Financial Stability (HCSF) has tightened the criteria for granting mortgage loans. Two rules now govern the market: the debt-to-income ratio must not exceed a set threshold, and the maximum loan duration is capped. These constraints are applied by almost all banking institutions.
The three elements that make the difference in a file
- The personal contribution remains the strongest signal sent to the bank. The higher it is, the stronger your negotiating position on the rate and loan conditions.
- The stability of income weighs as much as its amount. A confirmed permanent contract or several years of regular self-employment reassure more than a high but recent income.
- The “remaining to live,” that is, the amount available each month after paying all fixed charges, is closely scrutinized. A family with a comfortable income but ongoing consumer loans will see their application weakened.
Before looking for a property, tidy up your finances. Pay off small ongoing loans, stabilize your savings for three to six months, and avoid bank overdrafts. The financing file should be prepared several months before the first visit.
Additional costs and the real budget of a property purchase
The price displayed in the advertisement represents only part of the total cost of your project. Many buyers find themselves in difficulty because they have only budgeted for the price of the property and the loan monthly payment.
Are you thinking of an old property? Notary fees represent a significant portion of the purchase price. For a new property, this portion is reduced, but other costs arise: connections, interior fittings not included in the delivery price.
Often underestimated costs
- Loan guarantee fees (surety or mortgage) add to the cost of the loan. Their amount varies depending on the chosen organization.
- Borrower insurance impacts the total duration of financing. Comparing several offers can lead to significant savings.
- Compliance or refreshment work, which are not always identified during the first visits.
- Co-ownership charges, in the case of a purchase in a building. Request the minutes of the last general meetings to identify voted or upcoming works.
Add up all these items before setting your maximum purchase budget. Start from the total available amount (contribution plus borrowing capacity), then subtract each additional cost. The result gives the real purchase price you can aim for, often lower than the initially hoped amount.
Sales agreement and preliminary contract: the clauses to read before signing
The preliminary sales agreement is not a formality. This document legally binds the buyer and the seller. Two elements deserve particular attention.
Suspensive conditions protect the buyer. The loan acquisition clause is the best known, but not the only useful one. You can negotiate a suspensive condition related to obtaining a building permit, the completion of work by the seller, or the absence of undeclared easements. Each condition must be drafted precisely: loan amount, maximum accepted rate, deadline for obtaining.
The legal withdrawal period runs from the receipt of the preliminary agreement. Use this time to reread each page, check the technical diagnostics, and ask your questions to the notary. A vague point at this stage can become an expensive dispute after signing the final deed.
A successful real estate project relies less on luck than on the rigor of preparatory work. The DPE, the banking file, the real budget, and the clauses of the preliminary agreement form a coherent whole. Neglecting any one of these elements weakens the rest.