The CECB (Cantonal Building Energy Certificate — in German: GEAK) carries a reputation as an administrative formality. Many property owners view it as one more piece of paper to provide, with no practical usefulness. That is a short-sighted reading. The CECB, and especially its + version, has become a genuinely useful tool for managing the energy renovation of a property, and it is now required in several French-speaking cantons at the point of sale or to unlock subsidies.
This article sets out the position canton by canton on what is mandatory in 2026, what is not, and what will be soon. With a simple observation: even where the CECB is not mandatory, obtaining one is almost always a worthwhile investment.
Vaud: mandatory at sale since 2025
Vaud was one of the first French-speaking cantons to make the CECB mandatory in certain situations. The 2026 rule:
At the sale of a building constructed before 1990: the CECB must be available and handed to the buyer at the time of the transaction. This obligation applies to notarised sales of single-family homes, apartment buildings, and co-ownerships (PPE).
To benefit from a cantonal renovation subsidy: the CECB+ is required. Without a CECB+ less than 24 months old, the application cannot be processed.
For commercial or public buildings: specific rules apply depending on use and size, with sometimes more extensive audits.
The Vaud rule has a dual purpose: to inform buyers about the energy quality of the property (and therefore to anticipate renovation costs), and to steer the market towards greater consideration of energy performance in property valuation.
In practice, in 2026, a Vaud property built before 1990 without a CECB is harder to sell. Several property studies have shown that the energy class influences the sale price: a property rated F–G sells on average 8–12% less than an equivalent property rated C–D, at comparable size and location. It has become a market issue, not merely an eco-responsibility one.
Geneva: specific rules depending on use
Geneva takes a case-by-case approach. The cantonal energy law requires the CECB in several situations:
- At the sale of certain buildings (depending on age and type).
- When submitting a planning application for substantial modifications.
- To benefit from support via GEnergie or the SIG.
The Canton of Geneva maintains active oversight through the OCEN (Cantonal Office for Energy), which can be contacted to clarify the eligibility of a specific project.
A Geneva-specific point: municipal energy support programmes may impose their own CECB requirement in addition to the cantonal rule. Check with your municipality (Carouge, Meyrin, Versoix, Onex in particular) before putting together an application.
Fribourg: required for subsidies, not systematic at sale
Fribourg takes a pragmatic approach. The CECB is not mandatory at the point of sale, but it is required for any cantonal energy renovation subsidy application. In practice, it has become a near-universal step for Fribourg property owners who renovate their buildings.
The Fribourg Energy Department has well-structured support: a single contact for the dossier, locally referenced CECB experts, and reasonable subsidy processing times.
Neuchâtel: integrated into the cantonal energy plan
Neuchâtel has made the CECB a central tool of its energy policy. The canton makes virtually all its renovation support conditional on the prior production of a CECB+ and on the work being inscribed in an action plan.
This approach can seem constraining at first. It has one advantage: it prevents partial and incoherent renovations. When a Neuchâtel property owner obtains a CECB+ before deciding, they have a clear picture of the order in which to invest, and the subsidies unlock more than the sum of individual grants if everything is coherent.
Valais and Jura: recommended, not mandatory
In 2026, Valais and Jura do not require the CECB at the point of sale. It remains recommended, and required for most cantonal subsidies.
Valais: active cantonal programme, particularly for older buildings in tourist areas. The CECB+ opens access to additional support.
Jura: periodic support, worth checking each year. The CECB+ remains an asset for structuring a solid application.
The CECB+: the useful version
To understand the practical difference:
Standard CECB: an energy classification from A to G for the building envelope (insulation, windows, thermal bridges) and for overall efficiency (heating, domestic hot water, ventilation). It is a diagnostic, not an action plan.
CECB+: adds a costed consultancy report over 20 years. Investment options (full renovation, phased renovation, targeted measures), indicative costs, expected energy gains, and impact on CECB ratings. It is a decision-making tool.
The CECB+ is almost always required for cantonal subsidies. It is also significantly more useful for the property owner: it transforms an abstract diagnostic into a concrete roadmap.
On our sites, we frequently see CECB+ reports that have radically changed the owner's decision. Someone who planned to insulate their facade discovers that the roof space is the priority. Someone who wanted to replace their windows learns that their uninsulated roof space makes the window investment marginal. The true value of the CECB+ lies in overturning certain assumptions — sometimes dramatically.
What a CECB costs in 2026
Prices are relatively stable and consistent across French-speaking Switzerland.
Single-family home (standard CECB): CHF 500 to CHF 900.
Single-family home (CECB+): CHF 700 to CHF 1,500.
Building with 4–12 units (CECB+): CHF 1,500 to CHF 3,500.
Building with 15+ units (CECB+): CHF 3,500 to CHF 7,000, sometimes more for large complex buildings.
The typical work for a single-family home: 2–3 hours on-site, 4–6 hours of documentary analysis and report writing, with delivery of the report within 3–4 weeks. The price depends essentially on the availability of plans (a building without plans requires more on-site measurements) and the complexity of the envelope.
Several cantons partially subsidise the CECB+ (often 50% of the cost), provided the report leads to construction work. Worth checking at the time of application.
How to find a CECB expert in 2026
Only accredited CECB experts can produce a valid report. The official list is maintained by each canton and is publicly accessible. A few criteria for making your choice:
Location. A local expert knows the specific building stock of the area better (1970s construction in the Lavaux, pre-war Fribourg buildings, Valais chalets, etc.).
References. Ask for a few recent references, ideally from property owners comparable to yours.
Independence. Prefer an independent expert or specialist consultancy rather than an installer who offers the CECB as a prelude to an installation contract. The risk of a conflict of interest is real in the latter case.
Delivery time. A lead time of 4–6 weeks is normal. More than 8 weeks often indicates an overload that may affect the quality of the report.
Our advice for 2026
Whether or not you are in a canton that makes the CECB mandatory, obtaining a CECB+ before any substantial energy renovation is good practice. For four reasons:
- Coherent works. Avoids partial renovations carried out in the wrong order.
- Optimising subsidies. Cantonal subsidies are conditional on the CECB+.
- Property value. A CECB+ with an action plan is an asset at the point of sale.
- Long-term vision. A 20-year roadmap, prioritised and costed.
The cost (CHF 700 to CHF 1,500 for a house) is quickly recovered: through the sound decisions it guides, the subsidies it unlocks, and the value it adds to the property. Too many property owners still perceive it as a formality. It is in reality one of the most profitable investments ahead of any renovation.