Switzerland 2050 — Buildings, energy, and climate adaptation

A home is more than its heating system. It is also the room that heats up in the afternoon, the shade missing outside a window, a surface in need of repair, and the outdoor space through which water flows. When work is undertaken on a building, these conditions become part of the same project, even if they appear under different headings in the cost estimate.

Looking toward 2050 means asking how today’s decisions can support a long service life. There is no need to imagine a perfect, unchanging building. What matters is understanding what to retain, which problems to address together, and which possibilities to leave open. This is where Bau Lütz’s approach begins: the building, its setting, climate, and everyday use should be considered before a solution is selected.

1. Different horizons: the 2030 Agenda and the 2050 perspectives

The 2030 Agenda and the energy perspectives for 2050 are not interchangeable terms. Adopted in 2015, the 2030 Agenda for Sustainable Development comprises 17 goals and connects environmental, social, and economic dimensions. It is a framework for guiding choices and responsibilities, not a label that automatically certifies a building’s quality.

The Swiss Federal Office of Energy’s Energy Perspectives 2050+ address a different question: how can an energy system be developed that is compatible with net-zero greenhouse gas emissions in 2050 and a secure energy supply? The ZERO scenario includes variants with different technology combinations and rates of electrification. The initial results date from 2020 and the detailed documentation from 2021; this is not a new forecast published in 2026.

A scenario helps compare pathways. It does not predict the future of every home with certainty, nor does it replace the rules applicable to an individual project. Confusing these levels leads to oversimplified conclusions: choosing a technology because it features in a national scenario does not, by itself, show that it is suitable for the building in question.

For a client, the useful implication is less spectacular and more practical. It is worth questioning how long decisions will remain useful: will an internal layout accommodate different uses? Can part of the building envelope be repaired? Will the spaces needed for future work remain accessible? These questions do not prescribe a single solution. They make explicit what a decision may make easier—or harder—tomorrow.

2. From the Swiss framework to local requirements

The national level does not replace the cantonal level. The Swiss Federal Office of Energy emphasizes the cantons’ primary role in building energy policy, while the Confederation supports and complements cantonal action. Understanding a specific project therefore means moving from general policy directions to the instruments that actually apply at its location.

On August 29, 2025, the Conference of Cantonal Energy Directors (EnDK) adopted the revised Model Energy Regulations of the Cantons, MuKEn 2025, known in Italian as MoPEC. The crucial point is the nature of the document: a reference model and recommendations for the cantons, not a uniform building law that automatically entered into force throughout Switzerland.

Approval of the model, incorporation into cantonal legislation, and entry into force are separate steps. A requirement found in a national summary should therefore not be copied directly into a project specification without checking its version, scope, effective date, and any transitional provisions with the competent authorities.

When preparing a project, we suggest turning the administrative framework into precise questions. Which checks concern the building envelope? Which concern replacing the heating unit or integrating solar energy? Are there conditions relating to the property, its protected status, or its setting? Which procedure applies to the proposed works, and who must prepare and sign the required documents?

The useful result is neither a ranking of cantons nor an undifferentiated collection of regulations. It is a map of the project’s conditions: what is already established, what needs verification, and who takes responsibility. Administrative information then becomes part of the initial work, alongside the survey and an understanding of use, instead of appearing only when decisions have become difficult to change.

3. Reducing demand and living comfortably in summer

Reducing emissions and adapting to climate impacts are related but distinct objectives. In assessing a building, the first also draws attention to energy demand and sources; the second asks how suitable conditions for use can be maintained in the climate conditions to be faced. A decision does not necessarily address both questions to the same extent.

The SwissEnergy guide to summer overheating encourages consideration of orientation, glazing, solar shading, internal heat gains, and ventilation together. External shade and the ability to remove heat during favorable hours form part of this reasoning, which must also account for daylight and useful solar gains in winter. Simply adding one device to a room without understanding its conditions is therefore not enough.

Comfort also depends on use

To translate these principles into a project, we begin with people and spaces. When are rooms occupied? Who can operate a shading device? Is opening a window at night compatible with noise, security, and outdoor conditions? Where are activities requiring concentration or rest located? These are questions to investigate on site, not a diagnosis that can be made from a photograph of the facade alone.

Alternatives become clearer when they are compared against the same intended use. A highly complex solution that is difficult for occupants to operate deserves a different assessment from one that is understandable and maintainable. The design should also explain the conditions required for operation: who adjusts it, who checks it, and what happens if an element is not used as intended.

4. Water and soil: the project continues beyond the door

Outdoor space is more than a finishing treatment around a building. The Federal Office for the Environment’s climate adaptation tool for municipalities considers challenges including heat, drought, and heavy rainfall. It helps identify issues and opportunities for local action; it does not replace examination of a site or assessment of a specific project.

For a project, we suggest a continuous reading of the site, from the openings of the house to the property boundary. Where does water arrive? Which paths can it follow? Which surfaces are impermeable, and which opportunities for change deserve further study? Where are shade and usable spaces needed? This initial picture should reveal the checks required, not justify a solution chosen in advance.

Proposals for planting, permeable ground, or rainwater management must also be assessed against real conditions and with the relevant expertise. It is necessary to know what information is missing, which constraints need clarification, and who will oversee maintenance. A well-presented decision on a plan remains incomplete if it is unclear how it will be built, used, and cared for.

The design value lies in making the relationship between the parts understandable: entrance, paths, facade, open spaces, and boundaries. Addressing them together at least allows conflicts to be identified before construction and questions to be put to the right people, without attributing unverified benefits to a single measure.

5. Existing buildings as a resource, not an obstacle

The built environment already contains materials, spaces, and labor. Before deciding what to replace, it is worth distinguishing what has deteriorated from what is merely poorly understood or no longer suited to its current use. Keeping everything at any cost is not a method; demolishing everything to simplify the design should not be one either.

The Federal Office for the Environment describes the circular economy through actions that extend the use of products and materials: repairing, reusing, restoring, and designing with durability and disassembly in mind. Recycling is part of this picture, but it is not the same as reuse. This framework does not imply an automatic quantitative benefit for every decision; comparisons must concern the actual case.

In work on existing buildings, this means preparing a reasoned selection. Which elements can remain in place? Which require specialist examination? What can be dismantled and retained without compromising its suitability? Recovery, storage, preparation, and reinstallation are activities to organize, not words to add to a project description at the end.

Sequence matters as much as the individual intervention

Imagine, as a general example rather than a Bau Lütz case, an occupied building where work on windows, the envelope, and building systems is being considered. The comparison should not be limited to three independent quotations. It is necessary to clarify the conditions each intervention leaves for the next, which checks must precede it, and which disruptions are compatible with the building’s use. Alternatives may include a coordinated project or successive phases, but each must make dependencies and unresolved issues clear.

The same attention applies to maintenance after handover. Where will access be possible for inspections? What instructions will remain available? Who will be able to distinguish a routine adjustment from a problem that needs reporting? Including these questions in the design means considering the building beyond the moment of the final photograph.

Two Bau Lütz site accounts illustrate specific aspects of this relationship with existing buildings. In Genthod, recovering, preparing, and relaying tiles document a choice to reuse them. In Meyrin, images of interior strip-out work accompany the account of renovating the home. They are records of work and execution decisions, not measurements of energy performance or images of a fully completed result.

6. Tools and grants: possibilities to verify

A support program may form part of an economic assessment, but it should not become an unverified premise for a decision. It is useful to distinguish the relevance of an idea, its formal eligibility, and the actual award of a grant. Administrative schedules should also be considered before making commitments that are difficult to revise.

The Buildings Programme provides guidance on incentives for energy renovation and cantonal conditions. Its procedure calls for an application before work begins. For an individual property, eligible measures, documents, and conditions must be checked with the competent service: the program’s existence alone does not determine the grant that can be obtained.

Adapt+: the application window

The federal Adapt+ program supports climate adaptation measures according to specific criteria and assessments. It is not a blanket incentive for every project described as sustainable: the relationship between the measure, expected impact, costs, and funding conditions must be documented.

When consulted on September 20, 2026, the Federal Office for the Environment stated that the 2026 application deadline had passed on March 31. New applications will be possible in 2027; the precise period was not yet given on the page. Registration in the system, preparation of an application, and the funding decision remain separate stages.

For anyone considering a project, these instruments are reference points to connect with a defined proposal. They do not replace assessment of the property, attest to a proposal’s quality, or justify treating funds that have not been awarded as already available.

7. From the 2050 horizon to the next decision

The most useful step is not to reduce the entire framework to a product list. It is to assemble enough information for the next decision. An initial dossier can compare the building’s condition, intended use, site conditions, known constraints, and open questions, without pretending that everything has already been defined.

Comparable alternatives can then be developed. What changes if an element is retained? Which checks are needed before replacing it? Which works need coordination? What can only be decided after further investigation? For each alternative, it is useful to make explicit not just a desired result but also the conditions on which it depends.

A good decision may be to proceed, revise the scope, or pause while awaiting necessary information. Proportion matters: not every question immediately requires a complete project, but neither can every uncertainty be resolved with a generic answer. The next step should have a clear purpose, defined responsibilities, and traceable information.

It is in this sense that 2050 already concerns the present. Not as a promise of a problem-free building, but as attention to longevity, adaptability, and the quality of decisions about existing buildings. To discuss a specific property or need, the professional starting point is the Bau Lütz preliminary study.

Sources and consultation date

Primary sources consulted on September 20, 2026: SFOE, buildings and Energy Perspectives 2050+; FDFA, 2030 Agenda; EnDK, 2025 revision; SwissEnergy, summer comfort; FOEN, local adaptation, circular economy, and Adapt+ procedure; Buildings Programme. The programs’ operational conditions should be checked again when preparing an application.