Rising rental costs in Switzerland (Winter 2026): Renting out a room to balance your budget

Winter 2026 is knocking at our door, and with it, a major concern for many households: paying energy bills. While snowy landscapes are part of our country's charm, the cost of heating our homes has become a real financial headache. Faced with bills that continue to weigh on purchasing power, more and more tenants are looking for sustainable solutions. At Roomlala, we are observing a strong and pragmatic trend: taking in a flatmate or student to share costs. But how do you go about it in practice? Discover why partial subletting is emerging as the best strategy to cope with Swiss rental charges 2026, while optimising the space in your home entirely legally.

Understanding Swiss rental charges 2026: Why does the bill remain so high?

To fully grasp the situation this winter, it is crucial to look at the figures and the legislation. Although we have passed the peak of the global energy crisis, energy prices in Switzerland have stabilised at a high level, directly impacting the statement of charges you receive from your property management agency.

Read also: New subletting rules in Switzerland: How to rent out a room legally in 2026, Subletting in Switzerland in 2026: The actual rules for letting out your room and Ontario rent increase 2026: Why renting out a room appeals to hosts

The impact of rising heating and electricity costs in Switzerland

According to the latest data published by ElCom (Swiss Federal Electricity Commission), the median price of electricity in Switzerland for 2026 is 27.7 cents per kilowatt-hour (kWh). At first glance, one might welcome a slight decrease of 4% compared to 2025. However, the reality is more nuanced: this rate remains 32% higher than the levels we experienced before the energy crisis. This stagnation at a high level means that the heating price rise in Switzerland continues to weigh heavily on household budgets.

In practical terms, an average family apartment that was paying monthly charge prepayments of 150 CHF a few years ago must now often pay more than 200 CHF, with no guarantee of avoiding a hefty additional bill in the spring. Winter 2026, with its forecasts of harsh temperatures, will only increase this pressure on radiators and, consequently, on wallets.

What does Article 257a of the Swiss Code of Obligations say?

It is important to understand what your landlord is allowed to charge you. In Switzerland, Article 257a of the Code of Obligations strictly regulates ancillary costs. Heating costs, hot water production, and electricity for common areas (such as the lift or the stairwell) constitute rental charges that can be directly passed on to the tenant. The landlord cannot invent new charges, but they do pass on the actual energy costs they pay to suppliers.

Let's take a concrete example: Sarah, a tenant in a 4.5-room flat in Lausanne, saw her annual statement of charges increase by 800 CHF in two years, mainly due to the cost of gas and electricity. As her salary has not kept pace with this inflation, she finds herself having to dip into her savings. It is precisely in this type of situation that subletting an unoccupied room makes perfect sense to cushion the blow.

Subletting a room in Switzerland: A legal and effective response for your budget

Faced with this inflation in housing-related costs, leaving a room empty in your flat has become a luxury that many no longer wish to afford. Fortunately, Swiss law is on the side of tenants who wish to optimise their space for economic reasons.

The inalienable right to sublet (Article 262)

Subletting a room in Switzerland is a fundamental right guaranteed by Article 262 of the Code of Obligations. At Roomlala, we are keen to reassure our community: this right is firmly anchored. In fact, the recent draft revision of the tenancy law, which aimed to drastically restrict the conditions for subletting, was definitively rejected by popular vote at the end of 2024. Swiss citizens thus reaffirmed the importance of this rental flexibility.

This means that in 2026, you still have the absolute right to sublet part of your home, whether to host a student from EPFL or UNIGE, a young professional, or a cross-border worker. This practice is part of a logic of mutual aid and the rationalisation of urban space, particularly in cantons where there is a housing shortage (such as Geneva, Vaud, or Zurich).

Budget flatshare: Sharing costs without sacrificing comfort

Adopting a budget flatshare strategy is extremely powerful. By renting out a room, you not only receive rent that helps pay the main rent; you also split the famous rental charges. Hot water, electricity, the internet subscription, and the Serafe fee can be shared fairly.

Let's imagine the case of Marc, a young retiree who has been living alone in a large flat in Geneva since his children moved out. Faced with winter charges, he decided to rent a room in his home via Roomlala. He now hosts Thomas, a master's student. Thomas pays a monthly rent of 650 CHF, including charges. For Marc, it is a vital source of income that fully covers the rise in his energy bills and even leaves him with some extra income for his hobbies, while providing him with pleasant company on a daily basis.

How to rent a room in your home legally in Switzerland?

While the law allows you to sublet, it nevertheless imposes strict rules that must be respected to avoid any conflict with your landlord or property management agency. At Roomlala, we support you so that this process is carried out with complete peace of mind.

Obtaining the agreement of the management agency or landlord

This is the golden rule: the main tenant must obtain the consent of their landlord to sublet part of their home. This request for authorisation must be made in writing and, as a crucial point of vigilance, it must be sent before the start of the subletting. Subletting in secret exposes you to a major risk: the extraordinary termination of your main lease for breach of trust.

Rest assured, the landlord cannot refuse your request arbitrarily. The law limits their refusal to three strict reasons: if you refuse to provide them with the conditions of the sublease (identity of the subtenant, duration, amount of rent), if the subletting presents major disadvantages for them (for example, if you sublet to a group of musicians who rehearse at night), or finally, if you are making an abusive profit.

Setting a fair and proportional rent

This last point is arguably the most important. In Switzerland, subletting is not a business intended to enrich you at the owner's expense, but a solution for sharing costs. The rent requested from your subtenant must be strictly proportional to the surface area rented and the associated charges.

Here is a concrete calculation example: You rent a 100 m² flat for 2000 CHF per month, including charges. You wish to sublet a 15 m² room. The subtenant will also have access to common areas (kitchen, living room, bathroom) which represent 45 m². It is generally estimated that the subtenant uses half of the common areas (22.5 m²). Their usage surface is therefore approximately 37.5 m², or 37.5% of the flat. The maximum rent you can charge them is therefore around 750 CHF (37.5% of 2000 CHF), plus a small margin (generally 10 to 20% maximum) if the room is rented furnished. If you ask for 1200 CHF for this room, the management agency will refuse your request due to abusive profit.

Essential precautions for peaceful cohabitation

Welcoming someone into your home is an enriching human adventure, but it requires a minimum of legal and practical framework. The main tenant (you) remains solely responsible to the landlord. If your subtenant does not pay their share or causes damage to the flat, the management agency will turn to you.

It is therefore absolutely necessary to draw up a written sublease agreement. This document will specify the duration of the lease, the amount of rent and charges, the notice period (generally one to three months), as well as the rules for living together. At Roomlala, we provide our members with contract templates compliant with Swiss law to facilitate this step.

In addition, always demand that your subtenant has private civil liability insurance (RC) valid in Switzerland. This is what will intervene if they accidentally damage the parquet floor in their room or the kitchen equipment. Finally, establish clear rules from the start regarding the use of heating: remind them that a temperature of 20°C is sufficient in living areas and that it is useless to heat the room to 25°C with the window open. Communication is the key to a successful budget flatshare.

Why take the plunge with Roomlala this winter?

Winter 2026 promises to be demanding in terms of budget. Swiss rental charges 2026, driven by consistently high electricity prices, require smart solutions. Rather than suffering these increases, taking back control of your budget by making use of unused space in your home is a modern, ecological, and supportive approach.

Our Roomlala platform is designed to connect you with verified and serious profiles, whether they are students, interns, or mobile professionals. We secure online payments, which guarantees you receive your rent without delay, and we offer you a framework of trust to communicate with your future subtenants before making your decision.

Do not let rising heating costs wreck your finances this year. Take the lead, inform your management agency, set a fair rent, and join the community of Swiss hosts who have made the smart choice of subletting. It is together, by sharing our living spaces, that we will get through the winter warmly, while keeping our peace of mind.