Buying land in Switzerland: what private building owners really need to know
- Simon Käslin
- May 19
- 10 min read
Updated: 5 hours ago
Whether you are building your own house, renovating an existing building, or acquiring a property with development potential: the first step is the same in all cases. You need the right plot of land.
Building land is a scarce resource in Switzerland. Since the revision of the Spatial Planning Act in 2014, building zones are no longer being expanded, but rather reduced where possible. Good locations are rare, prices are correspondingly high, and the market is difficult for private individuals to assess.
Anyone wanting to buy land needs not only to find the right plot, but also to understand what it is really worth, what is permitted on it, and what risks it carries. This article gives you a sound overview of the key questions when buying land in Switzerland.
Table of contents
Do you have a specific plot in mind?
An independent review before signing costs little compared to the purchase price and provides security.
1. Where can I find a plot of land?
Online portals
The most obvious starting point is the major property portals. On Homegate, ImmoScout24, or Comparis you will find plots and developable properties from all over Switzerland, with the option to filter by region, plot size, and price. These platforms offer a good market overview and allow a quick price comparison of comparable properties.
The structural disadvantage: attractive plots in sought-after locations are often not publicly advertised. They change hands before an advertisement is ever placed.
Local estate agents: the most effective channel for serious buyers
Anyone searching specifically in a particular region should make personal contact with local estate agents early on and register their own search profile: What project are you planning? What is your budget? Which locations are suitable, and which are not?
The decisive advantage lies in the timing: when an owner decides to sell and calls the local estate agent as a first step, you should already be known as an interested buyer. Many transactions come about this way, before a property ever reaches the public market.
2. How does the land purchase process work?
For many private building owners, buying land is their first comprehensive property transaction. It is therefore worth understanding the process.
Searching for a plot and initial clarifications
Before you sign a reservation agreement, some basic clarifications should already be in place: What is possible on the plot under building law? Is it serviced? Are there any obvious encumbrances or risks? This initial assessment does not need to be a complete analysis, but it should be sufficient for an informed decision about the reservation.
Reservation
Many sellers require a written reservation agreement before the purchase contract is notarised. This secures your option on the plot for a defined period. Important: a reservation agreement is not a purchase contract and does not offer full legal protection. The terms, in particular rights of withdrawal and any reservation fees, which typically amount to 1 to 2 percent of the purchase price, should be reviewed carefully before signing.
In-depth due diligence
Following the reservation, a more detailed review phase begins: the land register extract, zoning plan, building regulations, registered easements, the register of contaminated sites, and the utility line cadastre for servicing questions are now analysed in depth. A preliminary design can also be useful at this stage, working through the building possibilities in concrete terms and showing whether the plot can actually carry the planned project. Geotechnical or other expert reports may also form part of this phase.
Purchase contract and notarisation
In Switzerland, contracts for the purchase of land must be publicly notarised. A notary draws up the contract and certifies it. Without notarisation, the purchase contract is null and void under Swiss law. Which authority is competent for notarisation varies from canton to canton.
Transfer of ownership
Ownership passes to the buyer upon entry in the land register. Only at that point are you the legal owner of the plot.
3. What does a plot of land really cost?
The purchase price is not the total price. The following ancillary costs regularly arise when buying land:
Property transfer tax and land register fees: Depending on the canton, property transfer tax of between 0.5 and 3 percent of the purchase price is payable. Some cantons, including Zurich and Zug, have abolished this tax. Land register fees for the transfer of ownership are regulated at cantonal level and vary accordingly.
Notarisation fees: In most cantons the cost of notarisation is based on the purchase price and is usually in the per mille range of the transaction value.
Estate agent fees: If an estate agent is involved in the transaction, commissions in Switzerland are typically 2 to 3 percent of the purchase price. Who bears these costs is a matter of negotiation and should be clarified early on.
Servicing costs: Plots that are not yet fully serviced incur significant additional costs after the purchase for connection to roads, water, sewage, and electricity. These servicing contributions are often levied by the municipality and can be substantial depending on the location and size of the plot.
Ancillary financing costs: Banks generally require an independent valuation of the land value as the basis for mortgage financing. This valuation fee, as well as any processing fees charged by the bank, must also be budgeted for.
As a guideline: on top of the purchase price alone, expect around 5 to 8 percent in ancillary costs.
4. What do I need to check before buying?
Servicing: complete, inadequate, or missing
Servicing is one of the most frequently underestimated cost factors when buying land. Serviced means that the plot is connected to the necessary infrastructure: road, drinking water, sewage, and electricity.
It is not only a question of whether servicing exists at all. Existing connections can also be inadequate or no longer up to date: outdated water pipes with insufficient pressure, a sewer system that no longer meets modern requirements, or an electricity connection with too little power reserve for contemporary uses. In such cases the infrastructure has to be renewed or extended. These costs are borne by the buyer.
Before buying, check the municipality's utility line cadastre and clarify which servicing infrastructure is in place, what condition and capacity it has, and whether any servicing contributions are still outstanding.
Soil and subsoil
A soil report provides information on the load-bearing capacity of the subsoil, groundwater conditions, and possible contamination. This information is decisive for the choice of foundation and has a direct effect on construction costs. Early clarification is particularly advisable for older industrial sites or for plots on a slope.
Natural hazards
A considerable part of Switzerland's settlement area is affected by natural hazards: flooding, mass movements, rockfall, or avalanches. The Federal Office for the Environment (FOEN) and the cantons maintain detailed hazard maps, which are publicly accessible via the cantonal GIS platforms. A plot in a designated hazard zone may be restricted in its use, difficult to insure, or entirely unbuildable.
Easements and encumbrances entered in the land register
Easements entered in the land register are private law rights and obligations attached to a plot that remain in force when ownership changes. Typical examples are rights of way for neighbouring plots, utility line easements in favour of supply companies, building prohibitions or building restrictions in favour of third parties, and registered rights of residence. In addition, rights of first refusal, purchase rights, or repurchase rights may be entered in the land register, which can make a later resale more difficult. A complete land register extract including all easement documents is therefore essential.
Contaminated sites
The cantonal register of contaminated sites (Kataster der belasteten Standorte, KbS) records plots where contamination of the subsoil is known or suspected as a result of earlier uses, for example from filling stations, landfills, or industrial operations. The obligation to remediate can pass to the new owner and cause considerable costs. Consulting this register is essential before any land purchase.
5. The most common mistakes when buying land
Assessment based on the price per square metre alone
The price per square metre is an unsuitable yardstick for assessing a plot. What matters is the realisable use potential: how much gross floor area can be developed on the plot? A comparatively expensive, small plot with a high permitted utilisation ratio can be economically far more attractive than a large plot with severe restrictions.
Purchase without an independent expert assessment
Information provided by the seller on building law and possible uses does not replace an independent review. A neutral assessment by an architect before the purchase decision regularly uncovers restrictions that are not immediately apparent from the documents.
Underestimating the servicing situation
Plots in the building zone that are not yet serviced, or are only inadequately serviced, are often costed too optimistically. Servicing costs arise after the purchase and, depending on the situation, can shift the entire calculation considerably.
Buying land outside the building zone
Plots outside the building zone are sometimes available at temptingly low prices. However, the Spatial Planning Act severely restricts new buildings and substantial structural alterations outside the building zone. What lies outside the building zone as a rule stays there, and reclassification into the building zone is the exception in current spatial planning practice.
Too little time for due diligence
Time pressure is a poor adviser when buying land. A careful review of the land register extract, zoning plan, building regulations, and all encumbrances takes time. Anyone who buys under pressure risks overlooking essential information.
6. What am I allowed to build on the plot?
This question rightly occupies private building owners, because the answer is rarely simple.
An important starting point: in Switzerland most plots are already built on. The relevant question is therefore often not only whether you may build something new here, but also what you may renovate, convert, extend, or change in terms of use. The same zoning rules apply to interventions in existing buildings as to new buildings.
The zoning plan
The municipal zoning plan forms the basis: it determines which zone a plot lies in and therefore what type of use is permitted at all. Residential zone, commercial zone, zone for public buildings, agricultural zone: each zone has different rules. Plots in the agricultural zone or outside the building zone are governed by federal law and are severely restricted in what may be built.
The municipal building regulations
The municipal building regulations specify what is permitted within each zone. The key figures most relevant for building owners are:
Utilisation ratio (Ausnützungsziffer, AZ): indicates the ratio of permissible gross floor area to the eligible plot area. A utilisation ratio of 0.6 on a 600 m² plot allows a maximum of 360 m² of gross floor area.
Building coverage ratio (Überbauungsziffer, ÜZ): determines what proportion of the plot area may be covered by buildings. It influences the scope for arranging buildings on the plot.
Building height and number of storeys: The permissible ridge height or overall height, as well as the maximum number of full storeys, are also regulated and vary considerably from zone to zone and from municipality to municipality.
Development plans and special land use regulations
In certain areas, specific development plans or special land use regulations apply in addition to general zoning law. These instruments can set tighter conditions, for example on the placement of buildings, on materials, or on the design of outdoor space, but in individual cases they can also open up greater freedom than the standard regulations. The municipality can tell you whether such plans exist for a particular plot.
Cantonal differences
Planning and building law in Switzerland is regulated at cantonal level. What applies in a residential zone in Zurich does not necessarily apply in a residential zone in Bern or Lucerne. What counts is always the cantonal planning and building act together with the specific building regulations of the municipality concerned.
What the figures in the building regulations mean in practice often only becomes clear during concrete planning. An architect can show you at an early stage what is realistically feasible on a particular plot and where the limits under building law lie.
7. Is a professional site analysis worthwhile?
A professional site analysis by an architect clarifies, before the purchase decision is made, what is possible on a plot under building law, what costs you can realistically expect, and whether the plot suits your specific project.
The cost of such an analysis is modest compared with what a bad purchase means: a plot that does not meet your requirements, causes unplanned additional costs, or does not permit under building law what you had intended.
More about site analysis by an architect
8. Conclusion
Buying land in Switzerland is a complex transaction that demands careful preparation. Anyone who asks the right questions early on, whether the plot is serviced and what condition the infrastructure is in, what is possible under building law, and whether encumbrances are entered in the land register, makes better founded decisions and avoids costly mistakes.
Experience shows that most problems can be identified and priced in through a professional review before the purchase. That is the greatest leverage private building owners have in this process.
9. Frequently asked questions about buying land in Switzerland
What ancillary costs should you expect on top of the purchase price? The purchase price is not the total price. Depending on the canton, property transfer tax of between 0.5 and 3 percent of the purchase price is payable, plus land register and notarisation fees, any estate agent commission of usually 2 to 3 percent, and servicing and ancillary financing costs. As a guideline, on top of the purchase price alone, expect around 5 to 8 percent in ancillary costs.
Does a reservation agreement already commit you to the purchase? A reservation agreement secures your option on the plot for a defined period, but it is not a purchase contract and does not offer full legal protection. Review the terms carefully before signing, in particular rights of withdrawal and any reservation fees, which typically amount to 1 to 2 percent of the purchase price.
When do you become the legal owner of the plot? In Switzerland, contracts for the purchase of land must be publicly notarised, otherwise the purchase contract is null and void under Swiss law. Ownership then passes to the buyer upon entry in the land register. Only at that point are you the legal owner of the plot.
What does serviced mean, and who bears the costs of missing connections? Serviced means that the plot is connected to road, drinking water, sewage, and electricity. Existing connections can, however, be inadequate or no longer up to date, for example outdated water pipes with insufficient pressure or an electricity connection with too little power reserve. The costs of renewal or extension are borne by the buyer, which is why you should check the municipality's utility line cadastre before buying.
How much gross floor area does the utilisation ratio allow you? The utilisation ratio indicates the ratio of permissible gross floor area to the eligible plot area. A utilisation ratio of 0.6 on a 600 m² plot allows a maximum of 360 m² of gross floor area. Also decisive are the building coverage ratio and the permissible building height and number of storeys under the municipality's building regulations.
What encumbrances can be entered in the land register and in cantonal registers? Easements entered in the land register remain in force when ownership changes, for example rights of way, utility line easements, building prohibitions, or rights of residence. Rights of first refusal, purchase rights, or repurchase rights can also be entered and can make a later resale more difficult. Ask for a complete land register extract including all easement documents and also consult the cantonal register of contaminated sites.
Do you have a specific plot in mind?
An independent review before signing costs little compared to the purchase price and provides security.
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