EPC and mortgage financing: when the energy rating blocks or increases the cost of your loan

You found the property. Your offer was accepted. You submit your mortgage application. And the bank comes back with an unexpected response: financing refused, or conditional on energy renovation works being completed within three years, or a reduced loan amount because the mortgage value assigned to the F-rated property is lower than the purchase price.

This scenario, marginal just three years ago, has become common. The integration of EPC ratings into French banks' credit risk assessment criteria has accelerated since 2022, driven by the European Banking Authority's ESG risk guidelines (EBA/GL/2022/06), ongoing prudential developments at the European level, and internal climate risk management policies that some institutions have begun to apply systematically.

This article explains how the EPC rating concretely feeds into bank financing decisions, what types of conditions and restrictions you may encounter depending on the property's energy class, how to prepare your file to minimise obstacles, and what options exist to finance both the acquisition and renovation works simultaneously.

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Are You Affected? Impact by EPC Class of the Property Being Financed

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What Banks Actually Assess Since 2022

From informational to credit risk: the regulatory shift

Before 2022, the EPC appeared in mortgage files as part of the DDT (technical diagnostics file) — with no direct influence on the lending decision. Banks financed energy-inefficient properties without specific conditions, considering that the property value and borrower solvency were the only relevant criteria.

Two developments changed this logic. First, the EBA/GL/2022/06 guidelines from the European Banking Authority required credit institutions to identify, measure and integrate transition energy risks into their credit risk analysis — including the foreseeable depreciation of energy-inefficient property assets. Second, the progressive rental bans (G-rated since January 2025, F in 2028) created a risk of lost rental income for investor borrowers, affecting their future repayment capacity.

These two factors led several French banks to integrate the EPC rating into their risk matrices — with policies varying between institutions, but a common trend towards greater restrictions on F- and G-rated properties.

The three mechanisms of impact on financing

Mechanism #1 — Mortgage value discount. Some institutions apply a discount to the property value used as mortgage collateral for F- or G-rated properties. If the property is valued at €300,000 but the bank only retains €270,000 as the mortgage value (a 10% discount), the maximum loan amount is reduced accordingly — regardless of the purchase price or the borrower's down payment.

Mechanism #2 — Renovation commitment clause. Some institutions grant financing on condition that energy renovation works are completed within a defined period (typically 2 to 5 years), with certification of a post-works EPC reaching a minimum threshold (often class D). This clause is written into the special conditions of the loan and backed by contractual penalties for non-compliance: rate increase, partial acceleration of repayment, or financial penalties — depending on the terms negotiated with the institution. It is distinct from a condition precedent (which conditions the formation of the contract) and does not constitute a resolutory condition under French civil law, which would retroactively void the loan.

Mechanism #3 — Outright refusal. In the strictest cases — primarily for G-rated properties at certain institutions — financing is simply refused, with no possibility of conditions. The borrower must then either find another institution with a more flexible policy, abandon the property, or present a credible renovation project to rework the application.

What the bank won't always tell you

The heterogeneity of policies between institutions is significant. As of the date of this article, credit policies linked to the EPC have not been standardised by binding national regulation — each bank applies its own criteria, with thresholds, discounts and conditions that vary. Some institutions have not yet formally integrated the EPC into their lending criteria; others have done so systematically since 2023.

This heterogeneity means that one institution's refusal is not final: a file rejected for an F-rated EPC at one bank may be accepted — sometimes without conditions — at another. Comparing institutions is more decisive than ever, and working with a mortgage broker who knows each network's current policies is a concrete advantage.

In the event of refusal, the bank is not legally required to state its reasons for mortgage applications — it can refuse without justification. You can request an explanation from your adviser, but only fully automated decisions open a formal right to explanation under Article 22 of the GDPR, which has limited practical scope. The most effective strategy remains understanding the institution's criteria through a broker and reworking the file before submitting to another network.

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Four Real-World Situations and How to Handle Them

Situation #1 — Buying a primary residence rated F or G

This is the situation where the banking impact is most direct and least negotiable. The borrower has no rental income to present — their only argument is their personal solvency and their renovation project.

What helps:

• Presenting a costed energy renovation quote from a diagnostician or engineering firm, accompanied by a post-works EPC simulation reaching class D or C
• Integrating the renovation cost into the financing plan from the outset — via an attached works loan or an éco-PTZ (interest-free energy renovation loan, if the property is over 2 years old)
• Choosing a notary who can document in the preliminary contract that the price includes an EPC discount — strengthening the coherence of the banking file

What hurts:

• A severely degraded EPC (class G, consumption > 420 kWh PE/m²/year) without a documented renovation project
• Insufficient down payment to cover both notary fees and a share of the renovation works
• A property in an area with low liquidity — the bank anticipates difficulty in realising the asset in case of default

Situation #2 — Buying a buy-to-let investment rated F or G

This is the most complex situation, because it combines two banking risks: asset depreciation risk (EPC discount) and rental income loss risk (prohibition on letting the property in its current state). These bans also apply to furnished lettings — see our guide LMNP and EPC: rental obligations and tax treatment of works.

For a G-rated property acquired as a buy-to-let investment, the bank cannot integrate rental income into the repayment capacity calculation if the property cannot be legally let in the short term. Some institutions refuse to finance a buy-to-let investment on a G-rated property on the grounds that the rental project is unfeasible without prior renovation works.

What helps:

• Presenting the project in two phases: acquisition + works financed simultaneously, with letting beginning after renovation
• Obtaining firm quotes to precisely quantify the total outlay (acquisition + works net of grants) and post-renovation rental yield
• Demonstrating the feasibility of works financing: estimated MaPrimeRénov', quantified CEE grants, possible éco-PTZ (interest-free energy renovation loan), calculated tax deficit

What hurts:

• Presenting the rental project without addressing regulatory constraints — the bank knows them and their omission from the file undermines its credibility
• A post-renovation rental yield insufficient to absorb the increased debt service from the works

Situation #3 — Refinancing or remortgaging a property already owned, rated F or G

An owner wishing to refinance their existing property (loan buyback, rate renegotiation, supplementary loan) may face a revaluation of the mortgage value incorporating the EPC discount — which can reduce the accessible refinancing amount or alter the terms.

For a landlord in the process of renegotiation, the bank may also factor in the evolving regulatory framework: an F-rated property whose rental income is frozen and which will be subject to a letting ban in 2028 represents a future cash flow risk that the bank integrates into its repayment capacity analysis.

What helps:

• Anticipating the renegotiation before works become necessary, while rental income is still intact
• Integrating a works loan into the refinancing to demonstrate that the property will be brought into compliance within a documented timeline

Situation #4 — Financing works alone on a property already owned

This is the most favourable situation: the borrower is not acquiring a new property, they are renovating an existing one they already own. Financing tools are numerous, stackable, and the absence of mortgage risk on a new acquisition simplifies the assessment.

What helps:

• The éco-PTZ (interest-free energy renovation loan) can be applied for on its own, without an attached main loan, for a property over 2 years old — this is the simplest and least expensive route for an owner-occupier or landlord
• MaPrimeRénov' grants and CEE premiums are deducted from the works cost before the loan is mobilised — reducing the capital to borrow and therefore the monthly payments
• For a landlord on the actual expenses tax regime, the tax saving via the foncier deficit (déficit foncier — rental property tax deficit) reduces the real net cost of works, strengthening the repayment capacity presented to the bank

What hurts:

• Works that are too fragmented and requested successively — banks prefer a single coherent overall file to several small successive éco-PTZ applications
• A property with an existing mortgage whose available equity is insufficient to secure a supplementary works loan

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Financing Tools for Energy Renovation Works

The éco-PTZ: interest-free loan for renovation

The éco-PTZ (éco-prêt à taux zéro — interest-free energy renovation loan) is an interest-free loan granted by partner banks to finance energy renovation works. In 2025, the main conditions are:

• Property completed more than 2 years ago at the date works begin (CCH article L.315-1) — covering all properties regardless of construction year, provided they are at least 2 years old
• Eligible works: insulation (roof, walls, floors), heating (heat pump, high-performance boiler), ventilation, windows
• Maximum amount: €50,000 for a package of works achieving a minimum performance level defined by decree
• Maximum term: 20 years — a longer term reduces the monthly payment and improves the debt-to-income ratio presented to the bank
• Can be combined with MaPrimeRénov' and CEE premiums

The éco-PTZ is particularly suited to owners whose repayment capacity would not support a standard works loan at market rates. For an F-rated landlord, it allows compliance works to be financed without significantly increasing their debt-to-income ratio.

CEE premiums: deduct before calculating the éco-PTZ

Energy savings certificates (CEE — certificats d'économies d'énergie) are premiums paid by energy suppliers in return for energy efficiency works. They are separate from MaPrimeRénov' and stackable with it. For the most common works on an energy-inefficient property, indicative amounts (2025 "coup de pouce" premium) are in the range of €1,500 to €4,000 depending on floor area and type of works: gas boiler replacement with a heat pump, loft or wall insulation.

The logical order for building the financing plan is: gross works cost — deduct MaPrimeRénov' — deduct CEE — balance financed by éco-PTZ or works loan. Integrating CEE premiums into this calculation reduces the éco-PTZ amount needed — and therefore the remaining monthly payments.

The attached works loan: financing acquisition and renovation in a single operation

For buyers purchasing an F- or G-rated property with the intention of renovating it, the most coherent solution is to integrate the renovation cost into the financing plan from the acquisition stage — in the form of a works loan attached to the main loan, or a single loan covering both. For a professional buy-and-resell operation, see our guide property dealers and the DPE in 2026: renovation strategy.

This approach has several advantages:

• It allows the bank to evaluate the project as a whole — an F-rated property at €300,000 + €25,000 in works yielding a D-rated property valued at €330,000 is a stronger file than financing the F-rated property alone
• It avoids having to refinance the works separately a few years after acquisition, in a potentially unfavourable rate environment
• It can provide access to the éco-PTZ for the works component, combined with the main loan for the acquisition component

Green loans: reduced rates for energy renovation projects

Several French banking networks (Crédit Agricole, BNP Paribas, LCL, Société Générale) offer mortgage loans at reduced rates for projects achieving a defined energy performance level — a minimum two-class EPC improvement or BBC Rénovation label. Rate reductions typically range between 0.10% and 0.30% depending on the institution and market conditions.

On a €165,000 loan over 20 years, a 0.20% rate reduction represents savings of approximately €3,300 in interest over the full term. This lever works in the opposite direction to penalty mechanisms: rather than penalising energy-inefficient properties, it rewards ambitious renovation projects. It is worth negotiating from the initial financing application, especially when the project targets a class improvement from F or G to C or better.

The foncier deficit: tax lever for landlord investors

For a landlord financing renovation works on an F- or G-rated property subject to the actual expenses tax regime for rental income (régime réel), the foncier deficit (déficit foncier — rental property tax deficit) is the most powerful tax lever. It allows up to €10,700 per year to be offset against total income, reducing income tax and social contributions (combined rate of 47.2% for a taxpayer in the 30% marginal bracket) from the year the works are carried out.

This tax advantage improves the net return on the investment after works — and therefore the strength of the banking file if the borrower presents it correctly: not as a renovation expense, but as a trade-off between the gross cost of works and their net cost after tax savings.

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Simulation: Financing a T3 Flat Rated F as a Buy-to-Let Investment

Property profile: T3 flat (55 m²) in Bordeaux, built in 1967, rated F (consumption: 355 kWh PE/m²/year). Purchase price: €195,000. Renovation works (wall insulation + gas boiler replacement with heat pump): €22,000 incl. VAT. Estimated MaPrimeRénov': €4,000. Estimated CEE premium: €2,000. Net works cost: €16,000. Estimated post-works EPC: class C (195 kWh PE/m²/year). Estimated post-renovation rent: €780/month. Borrower: 30% marginal tax bracket, net salary income €4,500/month.

Note on the integration of rental income: Banks integrate rental income at 70% of gross rent to account for potential vacancy, non-recoverable charges and the risk of unpaid rent. This weighting is a standardised banking practice, independent of the HCSF standard.

Scenario A — Acquisition financing only (without integrated works)

Scenario B — Acquisition + integrated works financing

Integrating the works into the financing plan — with the éco-PTZ over 20 years rather than 15 — reduces the works monthly payment from €89 to €67, lifts the mortgage discount, and allows rental income to be integrated into the HCSF calculation. The effective debt-to-income ratio goes from 21.3% (Scenario A, without rents) to 20.3% (Scenario B, with rents) — and the residual monthly outlay falls to €245.

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Common Borrower Mistakes When Facing EPC Issues

Mistake #1 — Not mentioning the EPC in the mortgage file. Some borrowers try to minimise the impact of the energy rating by not addressing it in their file. This is counterproductive: the bank has access to the EPC via the DDT attached to the preliminary contract and has been checking it systematically since 2023. A file that does not address the F-rating question when the property is rated F appears incomplete or disingenuous — and increases the credit analyst's mistrust.

Mistake #2 — Underestimating works in the financing plan. Presenting a minimal renovation quote to reassure the bank about the cost of works, then discovering that the real cost is twice as high, is one of the most common scenarios after acquisition. Both the bank and the borrower benefit from realistic costing from the outset, even if it is higher than initial expectations.

Mistake #3 — Neglecting the éco-PTZ for the works component. The éco-PTZ is systematically underused — many borrowers do not apply for it because they are unaware of their eligibility (any property over 2 years old) or because their broker did not mention it. For €16,000 of works at zero interest over 20 years, the saving compared to a standard works loan at 4% represents approximately €7,500 in unpaid interest.

Mistake #4 — Forgetting CEE premiums in the net works cost calculation. MaPrimeRénov' is well known; CEE premiums much less so, yet they are stackable and can represent €1,500 to €4,000 for the most common works. Failing to deduct them from the gross cost before calculating the éco-PTZ means over-borrowing unnecessarily.

Mistake #5 — Consulting only one institution. When faced with a refusal or renovation clause, the first reaction is often to try to convince the refusing institution. This is rarely effective — credit policies are applied at the scoring system level, not by the individual analyst. The effective strategy is to consult several institutions simultaneously through a broker, presenting an improved file incorporating the documented renovation project.