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For many buyers, the energy performance of a property has now become a key criterion.

  • The Cantonal Energy Certificate for Buildings (CECB) provides a standardised assessment of a property’s energy performance. A good energy rating can be a valuable selling point when putting a property on the market.

  • In several Swiss cantons (Vaud, Fribourg, Neuchâtel), energy assessment requirements apply when a property is sold.

  • A complete energy dossier reduces uncertainty for buyers, limits negotiations related to potential renovation work and speeds up the sales process.

Why is the CECB certificate key to increasing the value of your property in Switzerland?

The CECB is now the national standard for assessing the energy performance of a property.

Impact of energy ratings from A to G on the selling price

The CECB assigns two ratings from A to G: one measures the efficiency of the building envelope, while the other assesses its overall energy performance. This dual rating makes it easier for buyers to compare different properties.

A property rated A or B offers several advantages:

  • Lower energy costs;

  • Better thermal comfort in both summer and winter;

  • Reduced CO₂ emissions;

  • Less extensive renovation work required in the short term.

These factors contribute to creating genuine “green value”. Several European studies show that the most energy-efficient properties can command a premium when sold compared with energy-intensive buildings.

Although this added value varies depending on the canton and local property market, an excellent energy rating can often help position the asking price at the upper end of the range when the other characteristics of the properties are comparable.

The CECB Plus report for planning future renovations

When a property has room for improvement, the CECB Plus is an excellent addition.

In addition to the energy certificate, it includes a detailed assessment of the building and several costed renovation scenarios. Estimated costs, potential energy savings and renovation priorities are presented in a clear and structured manner.

Rather than leaving buyers to imagine potentially significant expenses, the report provides them with a clear plan outlining the necessary investments and their expected benefits.

Legal requirements for energy assessments in Swiss cantons

Some cantons require a CECB in specific situations, particularly when ownership changes or for certain older buildings.

This is notably the case in the canton of Vaud in several situations covered by its energy legislation, as well as in other cantons such as Fribourg, Neuchâtel and Jura, depending on the characteristics of the building or the work carried out. In Geneva, the CECB is not mandatory when a property is sold, but owners may be subject to other energy-related requirements, such as the heat consumption index.

These requirements are regularly updated as part of cantonal energy transition policies. It is therefore advisable to check the applicable regulations before putting a property on the market.

Which technical documents should you gather to demonstrate your property's energy performance?

In addition to the CECB, a complete technical dossier helps substantiate the stated energy performance and allows you to respond quickly to buyers’ questions.

Renovation invoices and insulation technical data sheets

Every energy-efficiency improvement should be properly documented. You should therefore gather evidence of the work carried out, including:

  • Invoices from contractors;

  • Equipment warranties;

  • Technical data sheets for insulation materials;

  • Photographs taken before and after the work;

  • Certificates of compliance, where applicable.

These documents demonstrate that the renovations were carried out by professionals and in accordance with applicable standards.

They also provide a precise record of when the work was completed, reassuring future owners about the age and expected lifespan of the installations.

Enhancing property value with heat pumps and solar panels

Systems using renewable energy are now a major selling point.

An efficient heat pump, a photovoltaic system or solar thermal panels can enhance the attractiveness of a property while reducing future energy costs.

The dossier can also include:

  • Commissioning certificates;

  • Maintenance contracts;

  • Inspection reports;

  • Proof of cantonal or federal subsidies received.

The availability of such subsidies often confirms that the installations meet the technical requirements set by the authorities and have been properly installed.

Heating statements: proof of low actual energy consumption

Theoretical consumption figures are not always enough to convince a buyer.

Providing heating statements from the past three years offers concrete evidence of the property's actual energy costs.

These documents make it possible to check whether the performance stated in the energy certificate is consistent with the actual energy consumption observed. They also facilitate comparisons with similar properties and provide buyers with greater visibility regarding their future budget.

How can you turn your property's energy advantages into strong negotiation arguments?

A comprehensive energy dossier does more than simply inform potential buyers. It can also serve as a powerful negotiation tool throughout the sales process.

Green mortgages: a financing advantage for buyers

Several Swiss banks offer green or eco-friendly mortgages for buildings with good energy performance or a high CECB rating.

Depending on the financial institution, these offers may include a preferential interest rate, a temporary interest reduction or favourable conditions for financing energy-efficient renovations.

For buyers, these savings can reduce the overall cost of purchasing the property. Sellers can therefore demonstrate that the asking price may be partly offset by potentially more favourable financing conditions.

Protection against unjustified price reductions

Price negotiations often focus on future work that the buyer may potentially have to undertake. A comprehensive energy dossier can significantly reduce this risk.

By providing a recent CECB, renovation invoices, maintenance contracts and actual energy consumption figures, the seller provides verifiable information that helps counter arguments based on presumed energy-efficiency or thermal shortcomings.

Negotiations therefore become much easier, as the buyer has access to objective information and the seller can justify the asking price more credibly.

FAQ

Is the CECB certificate mandatory when selling a property in Switzerland?

No, not throughout Switzerland. Requirements depend on the canton and sometimes on the type of building or the work carried out. It is advisable to check the applicable local requirements before putting a property on the market.

What is the difference between the CECB and the CECB Plus?

The CECB assigns an energy rating to the building. The CECB Plus supplements this assessment with a comprehensive audit that includes several renovation scenarios, their estimated costs and the expected energy savings.

Do solar panels increase the value of a property?

They can help make a property more attractive by reducing energy costs and improving its environmental and energy performance. However, their impact on the property's value depends on the local market, the condition of the installation and demand.

Should you keep invoices for energy-efficiency improvements?

Ideally, yes. Invoices, warranties, certificates and maintenance contracts provide evidence of the quality of the renovation work carried out and reassure buyers about the actual condition of the property.