In Geneva, buildable land is the canton’s scarcest commodity — and the most misunderstood. “Buildable” does not mean “vacant”: it is a legal, technical and administrative status, which must be verified point by point before buying, selling or building. Here is the complete method — and how the value of a plot is calculated.
What makes a plot buildable
Three cumulative conditions. The zone first: the plot must be located in a building zone according to the land-use plan — villa zone (the “5th zone”), development zone, industrial or craft zone; the agricultural zone, by contrast, is non-buildable except for narrow exceptions. The ground next: a plot in a building zone can remain unusable without major works — groundwater table, unstable soil, steep slope; a geotechnical survey before purchase is not a luxury. The connections finally: water, electricity, wastewater disposal — their absence can make construction impossible or prohibitively expensive.
Checking buildability: the Geneva method
Everything starts on the SITG, the canton’s official mapping portal: land-use zone, plot boundaries, land register, constraints — the essentials can be freely consulted there in a few clicks. Then the land register provides the legal layer: easements — a right of way or a building restriction changes everything —, ownership, registered liens. Finally, each municipality applies its own building rules: maximum heights, boundary distances, density — it is the municipal regulation and the LCI that set what the plot can actually carry.
What a plot is worth: two units not to be confused
The price of a plot must be reasoned in two different units — confusing them distorts every calculation. The price per m² of land: what the raw plot costs — commonly CHF 2,000/m² in the 5th zone, and well beyond in sought-after municipalities. Caution: this order of magnitude does NOT apply in a development zone, where the State regulates the price of the land (see below). The price per buildable m²: the value related to building rights, calculated by the land use index (IUS). The mechanics, by way of illustration: a 1,000 m² plot with an index of 0.3 allows 300 m² of floor space; at CHF 700 per buildable m², the “building rights” component comes to CHF 210,000. The more generous the index, the more the plot is worth — which is why two neighbouring plots of the same surface can be worth twice as much as each other. The full budget of a project then adds the construction cost to the price of the land.
In a development zone, the price is not a free price
This is the Geneva-specific feature that most owners discover too late. In a development zone, construction cannot proceed without the State validating the economics of the scheme: the building’s financial plan is reviewed before any letting or sale, and for ten years both sale prices and rent changes remain subject to its approval. This is organised by the general law on development zones (LGZD), with the aim of producing affordable housing.
Direct consequence for a landowner: the land price that the developer can enter in their financial plan is capped by an administrative practice of the cantonal housing office — it varies according to the authorised land use index. Since the May 2019 revision, you remain free to sell at the price you negotiate, independently of the one retained in the financial plan; but this cap shapes the whole discussion, since it sets what the buyer will be able to have recognised in their scheme. A variant also exists: exchanging the land for PPE (condominium) flats in the future building, at cost price.
In other words, two neighbouring plots of the same surface and the same index can be worth very different amounts depending on their zone. Before any negotiation, the question is not “what is the m² worth in my municipality” but “which zone am I in, and what does that allow”.
And the State may pre-empt
A second, more abrupt consequence of the development zone: the State and municipalities hold a right of pre-emption there. Article 3 of the general law on housing (LGL) provides for this for land situated in a development zone and for that affected by a change to zone boundaries — with the aim of building publicly-owned housing there.
The mechanism is triggered automatically: the notary notifies the sale to the authority, which has sixty days from the filing of the deed with the land register to waive its right, buy on the agreed terms, or propose its own price; if the municipality waives its right, the Conseil d’État keeps a further thirty days. A municipality of fewer than 3,000 inhabitants takes precedence over the State. None of this prevents the sale — but it must have been disclosed to the buyer before signing, and two to three additional months must be allowed for. This check forms part of the plot due diligence, on the same footing as easements.
Location, always
With equal building rights, Geneva’s scarcity ranks everything: a plot in Cologny, Chêne-Bougeries or on the lakeside is not in the same category as a peripheral plot. Restrictive easements, difficult access or connections yet to be created are deducted from the value — even in a building zone. The value of a plot is a calculation, never an intuition.
Selling your plot: the developer’s case
For an owner, the most relevant buyer is not always a private individual: a developer may offer more than the market if the plot supports a profitable scheme — their calculation incorporates the actual buildable potential, servicing costs and the expected return of the programme. This is a business we know from the inside: we constantly source land opportunities for developers, and our current developments show what these plots become. If you own a plot on the Left Bank, a valuation that quantifies both scenarios — a straightforward sale or development into a scheme — is the first step: our confidential audit handles this, with no obligation. To understand what is built next, our guide to new-build Geneva completes the picture — and technical terms are in the glossary.