11 November 2026 — Ramzi Chamat

Five-Room Apartments in Geneva: the Canton's Rarest Homes

Geneva's hardest home to find is neither a studio nor a two-room flat: it is the five-room apartment. On 11 November 2026 the Council of State fixed the vacancy rates by housing category that will apply for 2027, and the gap between categories is stark: only 0.23% of five-room homes are vacant, against 0.37% for one- and two-room flats [1, 2]. A headline rate that has stalled at 0.31% therefore hides a sharply segmented market, which matters for any holding or development strategy.

2027 vacancy rates: the ranking by category

The Council of State's weekly release of 11 November 2026 sets the following rates for the coming year [1]:

Category	2027 vacancy rate
1 and 2 rooms	0.37%
2.5 and 3 rooms	0.31%
4 rooms	0.24%
5 rooms	0.23%
6 rooms	0.30%
7 rooms	0.80%
Canton average	0.31%

Put into perspective, a 0.23% rate means that just 2.3 five-room homes stand available per thousand units [1]. The cantonal average, at 0.31%, has not moved. Only the seven-room segment stands apart at 0.80%, but it rests on a far smaller stock.

Why large apartments are the first casualty

This scarcity is no accident of history. It follows a stable economic trade-off. With land costs fixed and construction costs under pressure, a developer maximises output value by multiplying mid-sized units: more homes, a higher price per square metre, faster sales. A five-room apartment absorbs a great deal of floor area for a price per square metre usually below that of a new three-room flat.

Family households are therefore pushed back onto the older stock, precisely the stock whose large units are most exposed to conversion: subdivision, change of use, heavy refurbishment. Each operation removes a unit from an already tiny pool, with no guarantee of an equivalent replacement.

Fifty years below the shortage threshold

Housing is officially in shortage as soon as the vacancy rate falls below 2% [1, 2]. In Geneva the cantonal rate has exceeded 1% only ten times since 1975: from 1975 to 1977 and from 1993 to 1999, peaking at 1.65% in 1994. Since 1999 it has passed 0.50% only four times, in 2000 and between 2017 and 2019 [2]. Today's 0.31% therefore belongs to the tightest periods on record. Nationally, the rate dropped below 1% on 1 June 2026, placing Geneva within a broad tightening of supply [5].

What five-room scarcity means for owners

Market value. A well-located five-room apartment faces structurally stronger demand than the available supply. That tension supports resale value and allows a natural selection of tenants.
Rental income. Turnover is low and voids are rare, but rents in Geneva remain regulated: any increase must comply with the legal framework in force.
Conversion potential. Splitting a five-room flat into two smaller units is not a simple area calculation. Dwellings in categories under shortage are protected: their removal, conversion or change of use requires authorisation [4]. Administrative risk belongs in the numbers before the purchase agreement.
Maintenance. On a large unit, energy renovation weighs more in absolute terms; it is also a differentiator against almost non-existent competition.

What it means for developers

Typology. Reintroducing 4.5 and 5.5-room units in a new scheme is a commercial differentiator in a market saturated with two and three-room flats.
Product mix. Profitability per square metre pushes towards smaller units, yet solvent family demand persists: the trade-off is made project by project, depending on land cost and the share of subsidised housing.
Timing. Geneva's permitting timelines rule out any rapid adjustment of supply. Existing stock remains the main reservoir of large homes, and its conversion the main risk.
Design. A five-room apartment is judged on daylight, storage, kitchen and outdoor space. At equal area, the quality of the floor plan separates two competing properties.

Reading a vacancy rate correctly

Three methodological cautions. First, a vacancy rate measures a stock at a given moment, not a flow of newly marketed homes. Second, in a narrow category a handful of units moves the rate: the 0.80% for seven-room homes rests on a much smaller base than the 0.31% for three-room flats. Third, the cantonal average smooths substantial differences between municipalities and neighbourhoods. No public measure of demand by typology exists: these figures describe available supply, not search intensity.

Key takeaways

0.23% of Geneva's five-room homes will be vacant in 2027, against 0.31% for the canton [1].
Four-room flats follow closely at 0.24%, while one- and two-room flats reach 0.37% [1].
The legal shortage threshold is 2%: Geneva has stayed far below it for decades [1, 2].
Large-home scarcity stems from developers' economic trade-off, not from a lack of appeal.
Any conversion of a dwelling under shortage requires authorisation: administrative risk must be priced in [4].

Frequently Asked Questions

Why are five-room apartments the rarest homes in Geneva?

New construction favours small and mid-sized units, which are more profitable per square metre at a given land cost, while older large units are the most exposed to subdivision and change of use. The result is a 0.23% vacancy rate for 2027, the lowest in the canton together with four-room flats at 0.24% [1].

From what rate is housing considered in shortage?

Housing is officially in shortage as soon as the vacancy rate is below 2% [1, 2]. In Geneva the cantonal rate has exceeded 1% only ten times since 1975, most recently in 1999, with a peak of 1.65% in 1994 [2].

Can an owner split a five-room apartment into two flats?

It depends on the specific case. Dwellings in a category under shortage are protected: their removal, conversion or change of use is subject to authorisation [4]. A feasibility review with the competent authority should precede any decision, including the purchase agreement.