House-sharing in Lausanne: profitable opportunity or headache for the owner?

House-sharing was long seen as a matter for students and young professionals looking to cut their costs. Today, in a Lausanne rental market under constant pressure, it also interests owners who see it as a lever for higher yields. But renting an apartment to several tenants at once entails very specific responsibilities, and mistakes at the outset can be costly.

Why house-sharing appeals to Lausanne owners

Lausanne is home to a young, mobile and cosmopolitan population: students from UNIL and EPFL, employees of international organizations, young professionals starting their careers. This structural demand sustains a particularly active house-sharing market, notably in the Chailly, Bellevaux and Sébeillon neighborhoods and around Dorigny.

The financial argument is real. A four-room apartment rented as a shared home generates, room by room, an overall rent significantly higher than what a classic rental to a family or a couple would bring in. The difference can be significant depending on the location, the condition of the property and the amenities offered. For an owner who wants to optimize their rental yield without selling, it is a serious option.

Rental vacancy is also reduced. When one flatmate leaves the apartment, the others stay put and continue to pay their share. The owner is not exposed to a total vacancy as when a single tenant leaves. This continuity of income is a strong argument, especially in a context of variable interest rates.

The two legal models: everything changes with the contract chosen

In Switzerland, house-sharing can be organized according to two fundamentally different contractual structures, and the choice between the two shapes the entire rental relationship. Too many owners improvise on this point, with consequences that can be difficult to unravel.

The joint lease

In this model, all the flatmates sign a single lease. They are jointly and severally liable for paying the rent: if one of them defaults, the others must cover their share. The owner has only one collective contractual counterparty, which simplifies certain procedures. On the other hand, any change to the group (a flatmate leaving, a new one arriving) requires the agreement of all parties, including the landlord. Termination of the lease itself must be signed by all the flatmates. This lack of flexibility can generate friction.

Individual leases per room

Each flatmate signs their own contract for their room, with access to the common areas defined in the lease. This arrangement offers far greater flexibility: a departure or an arrival does not call into question the others' contracts. The owner keeps control of the group's composition and can select each new tenant themselves. The trade-off: the administrative management is heavier, and the common areas must be clearly defined to avoid disputes.

The choice of contractual model is the most defining decision for an owner starting out in house-sharing. It is better to take the time to think it through, ideally with the support of a property management professional, than to regret an unsuitable structure six months later.

What Swiss law says: essential points of vigilance

Swiss tenancy law, governed by the Code of Obligations (art. 253 et seq. CO), fully applies to house-sharing. A few particularities deserve the attention of owners who start out without support.

- Subletting: if a main tenant wants to take in a third party, they must inform the landlord and obtain their consent (art. 262 CO). The landlord can only refuse for specific reasons set out by law (abusive conditions, major drawbacks for the landlord, the tenant's refusal to disclose the conditions). House-sharing organized from the outset through individual leases avoids this issue.

- The security deposit: each flatmate pays their deposit under the rules of art. 257e CO (maximum three months of rent, placed in a blocked bank account in the tenant's name). With individual leases, each tenant has their own deposit account.

- Termination: the legal notice periods apply to each lease. Terminating the contract of a single defaulting flatmate, without affecting the others, is possible with individual leases. With a joint lease, it is far more complex, since the termination must in principle come from all the flatmates.

- The inspection report: carrying out an inspection report per room, and not just for the dwelling as a whole, makes it easier to attribute damage to the responsible tenant at the time of their departure.

Tenancy law is a federal matter. The canton of Vaud does not provide for rules specific to house-sharing, but local practices and case law offer useful benchmarks. An experienced property manager knows these customs and can avoid costly mistakes.

The concrete risks: what owners underestimate

House-sharing is not a passive arrangement. It requires greater involvement than a classic rental, and several risks are systematically underestimated by owners starting out for the first time.

Turnover and its hidden costs

Tenant turnover is structurally higher in house-sharing. More frequent inspection reports, partial restorations, periods spent searching for a new flatmate: these operations represent time and money. The gross yield advertised must always be weighed against the real cost of management.

Managing conflicts between flatmates

Disputes between flatmates (noise, cleanliness, use of common areas, internal unpaid amounts) often make their way back to the owner, who finds themselves cast, despite themselves, in the role of arbiter. Without clear rules set from the outset, these situations can escalate and harm the upkeep of the property.

Accelerated wear on the dwelling

More people in an apartment means faster wear on the equipment, the walls, the kitchens and the bathrooms. Maintenance charges mechanically increase. A shared dwelling must have robust finishes and equipment if the owner wants to limit repeated interventions.

The solvency of the flatmates

Checking the solvency of each flatmate is essential. Yet house-sharing profiles often include students without their own income, people newly arrived in Switzerland without a local history, or workers in precarious situations. Requesting parental guarantees, rent insurance or a joint guarantor must be anticipated.

Making your property attractive: the criteria that make the difference

Not all apartments lend themselves equally well to house-sharing. Certain features strongly increase the attractiveness and rental value of the property, while reducing friction between occupants.

- Rooms of sufficient size: a room that is too small is hard to rent with dignity. Favor rooms that allow space for a work area, especially since remote work has become standard.

- A suitable bathroom: ideally, two bathrooms or one bathroom and a shower room for four flatmates or more. It is a deal-breaker for many candidates.

- A fitted, functional kitchen: cooking together requires space and equipment in good condition. A run-down kitchen drives away good profiles.

- Internet connection included: offering a quality connection included in the charges has become an expected standard, particularly among students and international profiles.

- Individual storage: a wardrobe or storage closet assigned to each flatmate reduces storage conflicts.

- Good transport links: in Lausanne, proximity to the M1 or M2 metro, bus lines and cycle paths is a decisive argument for flatmates without a car.

Should you manage it yourself or entrust it to a property manager?

This is the central question for any owner considering house-sharing as a rental strategy. Self-management is possible, but it requires real availability, a good knowledge of tenancy law and the ability to handle sometimes delicate human situations.

Entrusting management to a real-estate agency has several concrete advantages. The property manager selects the candidates, drafts suitable contracts, carries out the inspection reports, handles the collections and steps in when disputes arise. For an owner who owns several properties or does not live in Lausanne, this delegation is not a superfluous cost: it is an assurance of peace of mind and legal compliance.

The cost of management must obviously be factored into the profitability calculation. But compared with the risks of haphazard management (unrecovered unpaid amounts, poorly handled conflicts, contractual errors), calling on a professional often proves worthwhile over time. A local agency, established in Lausanne and on the Vaud Riviera, knows the specifics of the market, tenants' expectations and local customs: a decisive advantage over a generalist national platform.

The key steps to get started with confidence

Before putting their property up for house-sharing, a prudent owner follows a logical sequence that protects their interests at each stage.

- Step 1: check the authorizations. Certain condominium or co-ownership regulations may limit or regulate house-sharing. Consult the founding deed and the administration and use regulations before taking any steps.

- Step 2: choose the contractual model. Joint lease or individual leases, the decision must be made with a professional and according to the profile of the future tenants.

- Step 3: prepare the dwelling. Carry out the necessary works, document the initial state of each room with dated photos, take an inventory of the furniture if the property is furnished.

- Step 4: define the house rules. An internal document (non-contractual but given to each tenant) setting out the rules for using the common areas reduces friction from the start.

- Step 5: select the flatmates rigorously. Complete application files, verification of income or guarantees, a preliminary interview to assess the group's compatibility.

- Step 6: ensure regular follow-up. Periodic visits to the property, responsiveness to requests, proactive management of renewals and departures.

House-sharing in Lausanne is a real opportunity, but it does not tolerate improvisation. An owner who is well informed, well supported and rigorous in their management can derive an above-average rental yield from it, while offering quality housing to profiles who genuinely need it in a market under strain.

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