This is a confusion that comes up regularly, especially among property owners who have done online research before contacting us. CECB or GEAK? Which one should you request? Do you need both? What is the practical difference?

The answer fits in one sentence: they are precisely the same certificate. But since the confusion persists, fuelled by the terminological coexistence between French-speaking and German-speaking Switzerland, this short article sets the record straight once and for all.

The same certification, two names

The Cantonal Building Energy Certificate arose from a joint project by the Conference of Cantonal Energy Directors (EnDK). Launched in 2009, it aimed to provide Switzerland with a single energy classification tool for buildings, valid in all cantons.

Like all official Swiss instruments, it exists under two linguistic designations:

  • CECB: Certificat énergétique cantonal des bâtiments (French).
  • GEAK: Gebäudeenergieausweis der Kantone (German).
  • CECE: Certificato energetico cantonale degli edifici (Italian, used in Italian-speaking cantons).

All three refer to exactly the same product: same methodology, same form, same A–G classification, same official standing. A CECB report and a GEAK report share the same structure, the same pages, and the same conclusions. Only the language of the document differs.

The enhanced version: CECB+ or GEAK Plus

Likewise, the enhanced version of the certificate (the one that includes the advisory report with a 20-year action plan) carries two names.

  • CECB+: the French version, pronounced "CECB plus".
  • GEAK Plus: the German version, identical to the CECB+.

When cantonal subsidies are conditional on holding a CECB+, this is exactly the same condition as for the GEAK Plus in German-speaking Switzerland. Cantons use the designation of their official language, but the content is the same.

Where the confusion comes from

Several factors allow this dual terminology to persist in everyday language.

Online searches mix the two. A French-speaking property owner searching for "energy audit Switzerland" sometimes lands on translated German-language content referring to the GEAK. They incorrectly conclude it must be a separate product.

Property owners in bilingual areas. The cantons of Fribourg and Valais, which are partially bilingual, may use both terms depending on the municipality or the department involved. A German-speaking Fribourg property owner will speak of GEAK; their French-speaking neighbour will refer to CECB.

International engineering firms. Some firms operating across several cantons use both terms interchangeably depending on their clientele, which can create confusion.

Cantonal administrative websites. Depending on the canton, you will find one term, the other, or both. The Cantonal Conference website defaults to GEAK in German and CECB in French, but with occasional cross-references.

What is NOT a CECB or GEAK

To clarify, there are a few related products that are not CECB certificates.

The Minergie label. An energy quality label issued by the Minergie association, primarily for new buildings or major renovations. More demanding than a good CECB class, but a different framework altogether. A Minergie-certified building will often also have a CECB class A or B, but the reverse is not true.

Internal audits by engineering firms. Some firms offer bespoke energy audits, often more detailed and more expensive than a CECB. They can be highly useful technically, but do not carry the official weight of the CECB for administrative procedures.

Quick online assessments. Several websites offer free or low-cost "calculators" or "energy diagnostics". None of these tools has the standing of an official CECB. They may provide a useful indication, but do not replace a certificate issued by an accredited expert.

French DPE assessments. The French Diagnostic de Performance Énergétique has no value in Switzerland. If you are purchasing a property in France, the DPE applies. In Switzerland, the CECB applies.

Choosing an expert: CECB is sufficient

In French-speaking Switzerland, you systematically request a CECB+. The expert will use the French-language form and terminology. If you live in Fribourg or Valais and prefer a report in German for a particular reason (a potential German-speaking buyer, for example), ask the expert to draft it in German. This is technically possible; the content remains identical.

A few criteria for selecting an expert:

  • Accredited by the umbrella association (verifiable on the official cantonal register).
  • Good knowledge of local building stock (a Valais chalet is not assessed like a Lausanne apartment block).
  • Independence from installers (preferable but not compulsory).
  • Reasonable delivery time (3–5 weeks).

In practice for 2026

Do not waste time looking for the "difference" between CECB and GEAK: there is none. Request a CECB+ from a French-speaking Swiss expert. The report will be valid throughout Switzerland, including for procedures that require a GEAK Plus in German-speaking Switzerland (very rarely relevant in practice for a property situated in French-speaking Switzerland).

The only situation where the distinction can have a practical bearing: if you are selling a property to a German-speaking buyer who would like a report in German. Request a German-language draft: the expert will apply the same methodology, and the report will carry the GEAK Plus designation.

For everything else, these two acronyms are synonymous. The confusion is more a media phenomenon than a real one.