Renovation Guide for French-speaking Switzerland

Energy renovation is a key lever to improve interior comfort while sustainably increasing the value of your real estate in French-speaking Switzerland.

With the constant evolution of thermal regulations and the growing incentive to reduce CO2 emissions, anticipating your work ensures the long-term value of your property. Owners are now encouraged to replace obsolete heating systems with renewable alternatives, thus reducing their dependence on fossil fuels.

In addition to optimizing energy efficiency, facade insulation and window replacement significantly improve the building's thermal insulation, which directly translates into lower heating costs.

Moreover, numerous financial subsidies are accessible at both federal and cantonal levels, making investments more affordable than before. Acting today also means preparing for future environmental performance requirements while benefiting from optimal conditions for an efficient enhancement of your home.

In the canton of Vaud, the simplified procedure or permit waiver applies to solar panels, heat pumps, and facade work, unless the building is protected. Taxpayers can choose between deducting actual costs or a flat rate for maintenance and energy investments.

Genève requires, through the Energy Law, that 100% of heat must be renewable when replacing a heating system, with a 20% tolerance under certain conditions. Heat pumps over 10 kW require a building permit.

In Fribourg, replacing a fossil fuel or electric heating system requires 10% of heat to be covered by renewable energy. The canton of Neuchâtel requires, when replacing a boiler, a renewable energy share of at least 20%, with a ban on fixed electric heaters planned for 2030.

The Jura has an Energy Ordinance regulating boiler replacements, notably gas boilers. Finally, the Valais complements the Building Program with specific cantonal subsidies for solar and insulation, aligning with the regional energy strategy.

The Building Program is the main instrument of the Confederation and the cantons to encourage energy renovation. It financially supports owners wishing to insulate their building's envelope (walls, roof, windows) or replace a heating system with a heat pump or solar thermal installation.

The amount of subsidies varies according to the performance achieved and the type of work performed. Additionally, the Confederation offers a one-off payment for photovoltaic installations, calculated based on the installed power (kWp).

These subsidies aim to reduce the cost of investments necessary for the ecological transition. It is essential to verify your project's eligibility on the official website before starting any work, as granting conditions may evolve and vary by canton.

This system not only reduces the carbon footprint of the building stock but also improves the thermal comfort of housing while benefiting from direct financial support for sustainable works.

In Switzerland, real estate taxation allows owners to deduct the necessary costs for the maintenance of their property. Taxpayers can opt for the deduction of actual costs or, in certain cantons such as Vaud, Fribourg, or Neuchâtel, for a flat-rate deduction based on rental value or gross income.

Investments aimed at saving energy and protecting the environment are specifically encouraged: they are 100% deductible. This concerns, for example, the replacement of obsolete installations with more efficient systems or building insulation.

If the investment costs related to these energy measures exceed the net taxable income during the billing year, legislation (LIFD) generally allows a carry-forward to the next two tax periods. However, it is prohibited to combine the flat-rate deduction with the carry-forward of investment costs.

Keep proof of payment and detailed invoices carefully. Before declaring your work, check the specificities of your canton of residence, as application rules and ceilings may differ according to local tax practices.

The success of a renovation project relies on rigorous preparation. The first step is to precisely define your needs and energy efficiency objectives. It is recommended to request multiple quotes from local companies to compare services. Regarding permits, the situation varies by canton.

For example, in Vaud, many installations benefit from a simplified procedure, while in Genève, the Urban Planning Office may require a building permit depending on the project type (especially for high-power heat pumps). In the canton of Neuchâtel, a simple notification suffices for certain solar installations.

Always contact your municipality or the competent cantonal service before starting work to confirm the legal framework. In parallel, check your eligibility for cantonal and federal subsidies (Building Program).

A complete and well-structured file, including detailed quotes and proof of environmental compliance, will not only facilitate obtaining permits but also the granting of financial aid.

Our guides are designed to provide you with a clear overview, adapted to the specificities of your place of residence. For each covered municipality, such as Lausanne, Genève, Sion, Fribourg, Neuchâtel, or Delémont, information regarding competent authorities and permit procedures is centralized.

You will also find sections dedicated to frequent types of work: window replacement, facade insulation, installation of heat pumps, or solar panels. To make the best use of these tools, start by identifying your canton and the type of renovation planned.

The provided cantonal facts allow you to verify local energy obligations, such as requirements on renewable energies when replacing a heating system. Do not forget to cross-reference this information with the financial subsidies available for your specific region.

This guide is meant to be a pragmatic consultation tool : for every project, systematically verify the specific conditions of your municipality, as additional requirements may apply locally.