The large-scale renovation marks a major turning point in 2025 with an ambitious target of 200,000 renovations. This global approach, which reduces energy bills by up to 60%, can now integrate photovoltaic panels to optimize the performance of your home. MaPrimeRénov’ supports this transformation with increased aid, which can finance up to 90% of the work for a renovation combining insulation, heating and solar energy production.
Large-scale renovation: a new turning point in 2025
Table of Contents
Definition and objectives of the large-scale renovation
Large-scale renovation represents a coordinated set of works aimed at improving the energy performance of a home in the long term. This comprehensive approach includes the insulation of the walls, the roof, the replacement of the windows and the modernization of the heating system.
Owners can now opt for a two-phase project over a maximum of 5 years, making the project more financially accessible. A guide each step, from the initial audit to the acceptance of the work.
The primary ambition is to achieve a minimum gain of two energy classes on the DPE, allowing homes classified F or G to reach at least class D. This requirement is part of the national strategy to combat thermal sieves.
Eligible works according to the ANAH
The projects subsidized by the ANAH include a wide range of technical interventions. Modernizing the ventilation system, installing a heat pump or replacing the joinery are preferred options.
ANAH pays particular attention to projects combining several types of renovations. For example, combining photovoltaic solar panels with high-performance insulation maximizes the amount of aid granted.
The program also supports the upgrading of electrical installations, the repair of heating systems and the installation of bio-based materials. A concrete example: a homeowner can couple the installation of an air-to-water heat pump with solar panels to optimize his green energy production.
Discover Anah’s 2024 report right here.
Energy performance conditions to be met
The success of a large-scale renovation is based on precise and measurable performance criteria. A minimum gain of 35% on the total energy consumption of the home is necessary according to the new 2025 standards.
Reducing heat loss requires strict technical requirements: an R-value of more than 6 m²K/W for attic insulation and 3.7 m²K/W for exterior walls. The installed joinery must have a Uw of less than 1.3 W/m²K.
Ventilation systems play a central role in achieving the goals. A double flu x CMV with a minimum efficiency of 85% guarantees optimal air quality while limiting energy losses. These technical standards ensure the sustainability and efficiency of the investments made.
I install a CMV
Integrating photovoltaics into your overall project
Advantages of the photovoltaic system
Real estate valuation is a major asset: a house with a photovoltaic installation sees its value increase by 5 to 10% on the market. This added value is in addition to the monthly savings made on your electricity bills.
Coupling with other equipment such as a heat pump or a thermodynamic tank maximizes the overall efficiency. For example, a typical household can save between €600 and €1200 per year by combining solar production and smart self-consumption.
The constant decline in the price of equipment, combined with state aid, makes investment particularly attractive in 2025.
I install photovoltaic panels
Compatibility with other energy works
The integration of the solar modules harmonizes perfectly with thermal insulation from the outside. This synergy makes it possible to optimize the intervention on the roof and reduces the overall costs of the site.
The simultaneous modernization of the electrical panel ensures that it is adapted to current standards, while the addition of controlled mechanical ventilation improves indoor air quality.
A revealing example: during a renovation in metropolitan France, the coordinated installation of the panels with the insulation of the attic generates 25% savings on labor. The monitoring systems then make it possible to intelligently control all the equipment, maximizing the performance of the renovated building.
Recommended technical solutions
The latest generation monocrystalline modules now achieve efficiencies of more than 22%. Their optimal integration requires a southeast to southwest orientation with an inclination of 30 to 35 degrees.
The addition of a lithium battery storage system significantly increases energy autonomy. The 2025 models offer a capacity of 5 to 15 kWh adaptable to your needs.
The microinverter technology, installed directly under each panel, maximizes production even in partial shading. This solution is particularly suitable for complex or partially shaded roofs.
A centralized home automation system synchronizes solar production with your energy-intensive equipment such as the washing machine or water heater. This intelligent management boosts the self-consumption rate by up to 80%.
👉 Are you hesitating between a microinverter and an optimizer? Our guide “Microinverter vs Optimizer, how to choose?” is for you!
MaPrimeRénov’ and large-scale renovation in 2025
Amounts of aid according to income
The amounts vary according to four income categories. For a very modest household, the aid finances 90% of the cost of the work, with a ceiling set at €70,000 for a global renovation allowing a gain of 4 energy classes.
Households with modest incomes benefit from 80% coverage up to a limit of €55,000, while intermediate households receive 65% funding capped at €40,000.
For the higher income category, the subsidy rate reaches 50% of the cost of the work, with a maximum of €35,000 for the most ambitious renovations. A concrete example: a family of 4 in Île-de-France with a tax income of €45,000 has access to €44,000 in aid for its large-scale renovation project.
The accompanied course: new formula
The redesign of the guided tour in 2025 considerably simplifies your renovation process. A Companion becomes your single point of contact, ensuring technical and administrative follow-up from A to Z.
This new formula introduces an in-depth preparatory phase with an energy audit and a personalized financial simulation. Your guide will analyze the technical solutions adapted to your home and optimize the combination of the various aids available.
An accelerated payment system now makes it easier to start work. The advance can reach 50% of the total amount as soon as the application is validated, allowing the project to be launched quickly without unbalancing your budget.
Eligibility requirements for owners
The criteria for access to large-scale renovation in 2025 are based on several fundamental requirements. Your home must be more than 15 years old and your main residence occupied for at least 8 months per year.
The completion of the work requires the intervention of RGE (Recognized Environmental Guarantor) certified craftsmen. An energy performance diagnosis must attest to a minimum gain of two classes after renovation.
For landlords, the rental commitment extends for a minimum of 6 years after the work. Usufructuaries can also benefit from the scheme, unlike real estate companies and bare owners who remain excluded from the program.
Other financial aid available
The Global Renovation Boost
The provides additional financial support for large-scale renovations. This aid particularly values work combining several technical solutions such as the combination of solar panels and thermal insulation.
For a 100m² home, the amount can reach €5,000 when the project allows a 55% reduction in energy consumption. Households with limited resources benefit from a subsidy that can double this amount.
To obtain this subsidy, an energy audit must be carried out before the work is carried out by a certified professional. Payment is made upon completion of the project, upon presentation of the receipted invoices and the final report attesting to the savings made.
Local and regional aid
Local authorities offer additional subsidies that vary according to where you live.
This specialist analyses your project and directs you to the right measures for your situation.
To find out what aid is available in your area, visit the website of your town hall or make an appointment with a France advisor. Administrative procedures are now carried out online via dedicated platforms, considerably simplifying access to local funding.
Energy Saving Certificates (CEE)
Energy savings certificates represent a major lever for financing your photovoltaic renovation in 2025. This mechanism, supported by energy suppliers, makes it possible to obtain substantial financing of up to €4,000 for a solar installation coupled with insulation work.
The value of this contribution varies according to the energy performance achieved after the work. A minimum gain of 35% on your annual consumption guarantees a bonus in the amount. For example, a household installing 6 kWp of photovoltaic panels with attic insulation can receive up to €5,500 in participation.
Combining CEEs with Map rime maximizes your renovation budget. An online simulator instantly calculates the amount to which you are entitled, on presentation of your energy bills and the technical description of your future equipment.
Key steps in your photovoltaic project
Mandatory energy audit
Carrying out a regulatory energy audit is the essential starting point for a successful large-scale renovation. This in-depth analysis examines the overall thermal performance of the building in all its aspects: insulation, ventilation, heating and domestic hot water production.
An RGE professional will come to your home to carry out precise measurements and identify energy losses. Its expertise leads to costed and prioritized work scenarios according to their profitability.
The audit also provides an estimate of energy bills before and after renovation. These projections help you size your photovoltaic installation according to your real needs.
Choice of RGE professionals
The selection of a certified craftsman deserves special attention. To guarantee the quality of your photovoltaic installation, start by consulting the France directory which lists qualified companies in your region.
Favour installers with certification, an additional guarantee of expertise in the solar field. Ask for at least three comparative quotes and systematically check the references of previous projects.
A good craftsman is distinguished by his ability to carry out a detailed technical study of your roof and to propose a sizing adapted to your real needs. Carefully examine the warranties offered on materials and workmanship, with particular attention to after-sales service.
Optimal work schedule
The coordination of the individual phases of the construction site requires careful planning.
The optimal phasing begins with the insulation work, followed by the installation of the ventilation system. The solar installation then takes place, before the modernization of the heating system. This sequence maximizes the overall energy efficiency of the building.
For a 100m² project, count on about 4 to 6 weeks of work. The project owner ensures synchronization between the different trades, allowing for a completion within the given deadlines while respecting the technical standards in force.
Maximize ROI
Estimating energy savings
A well-thought-out renovation project can achieve substantial reductions in your energy bills. Current data show that a 100m² house can see its consumption drop by 55% to 70% after work.
The addition of solar panels amplifies these gains. For a 6kWp installation, the average annual production reaches 6,000 kWh, i.e. a potential saving of €1,500 per year on your electricity budget at the current rate.
Hybrid solutions combining insulation and solar production have demonstrated their effectiveness: a typical household reduces its energy dependence by 80% in summer and 40% in winter. This performance is further improved with the use of an intelligent control system that synchronizes production and consumption.
Calculation of photovoltaic self-consumption
The rate of self-consumption is determined according to a precise formula: the share of solar energy consumed directly divided by the total production of the panels, multiplied by 100.
Free digital tools such as Autoclasis, developed by the National Institute of Solar Energy, make it possible to refine these calculations. This specialized simulator analyzes your consumption habits and compares them to the estimated production of your installation.
The implementation of a personalized energy monitoring reveals the optimal periods of use of electrical appliances. This detailed analysis helps to maximize your self-consumption rate, which can reach 75% with appropriate management of your equipment.
Amortization period of the overall project
The time required to make your overall investment profitable varies according to several key parameters. A project combining high-performance insulation and solar panels typically pays for itself between 8 and 12 years.
The development of the price of electricity plays a decisive role in this calculation. Faced with an average annual increase of 6% in recent years, profitability is naturally accelerating. Financial aid such as MaPrimeRénov’ considerably reduces this time.
A concrete example: a 120m² house in the PACA region, with a 6kWp installation coupled with complete insulation, reaches its break-even point in 9 years thanks to the cumulative savings on bills and the subsidies obtained.
