The vacancy rate is the share of completed, modern industrial stock that stands empty and available for lease at a given moment, expressed as a percentage of the total stock in a market. It is the single most-quoted health indicator in industrial real estate: a low figure signals a landlord’s market with rising rents and thin choice, a high figure signals negotiating power for occupiers – and the same national number can hide regions running at four times each other’s level.
What the vacancy rate measures
The vacancy rate answers one question: of all the modern industrial space that exists in a market, how much could a tenant actually lease today? The numerator is physically completed, unoccupied space that is actively offered to the market; the denominator is the total completed stock the researcher tracks. The result moves for exactly two reasons. Space is added – a speculative development completes without a tenant, or an occupier hands back a unit – or space is absorbed, when tenants sign and move in. That simplicity is why the figure carries so much weight: it compresses the entire balance of supply and demand into one percentage. It is also why the number needs careful handling. Different advisors track slightly different stock definitions, so the same market can be quoted a few tenths apart by two houses in the same quarter – the trend within one data series matters far more than any single print.
How the number is calculated – and what counts as vacant
The mechanics hide judgement calls that occupiers should understand. First, only completed buildings count: a hall under construction is pipeline, not vacancy, and only enters the statistics on delivery – which is why a quarter with heavy speculative completions can see the headline jump with no weakening of demand at all. Second, “vacant” normally means vacant and marketed: a unit an occupier has left but still pays rent on typically counts once it is offered for lease, while grey space – surplus capacity a tenant quietly holds without marketing it – often never appears in the statistics. Third, the figure says nothing about quality or fit. A market quoted at eight per cent can offer effectively nothing to a tenant who needs 20,000 square metres in one piece, cross-dock configuration or heavy power, because the empty space is scattered across small, older or oddly configured units. The headline number is the start of the site search, never the end of it.
Reading the Slovak numbers in 2026
Slovakia illustrates how much detail one national figure can hide. CBRE’s first-quarter 2026 data, reported by Property Forum, puts the country’s vacancy rate at 8.12 per cent of a modern stock of 4.87 million square metres – up 31 basis points on the quarter, with roughly 83,000 square metres of new supply delivered in those three months. The regional spread is the real story: western Slovakia stands at 10.27 per cent and central Slovakia at 9.83 per cent, while the wider Bratislava area runs at 6.92 per cent and the east of the country at just 2.66 per cent. The same market is simultaneously generous and tight, depending on where the requirement sits. Demand, meanwhile, is anything but weak – total leasing reached 136,000 square metres in the quarter, up 47 per cent year on year – so the elevated headline reflects supply arriving faster than it is absorbed, not tenants disappearing. For an occupier comparing regions, that distinction changes the negotiating posture completely.
What vacancy does to rents and incentives
Rents respond to empty space the way prices respond to inventory everywhere – but in institutional leasing the adjustment happens in the package before it happens in the headline. Landlords defend the quoted rent, currently around EUR 5.95 per square metre per month at the prime end of the Slovak market, and compete instead through incentives: a longer rent-free period, a larger fit-out contribution, softer indexation, more flexible break arrangements. That is why effective rents – what a tenant actually pays over the term once incentives are amortised – diverge from headline rents precisely when availability rises. The transaction mix tells the same story from another angle: in the Slovak first quarter, renegotiations made up 53 per cent of all transactions and pre-leases another 26 per cent. Sitting tenants turn the empty space around them into their renewal argument, and developers de-risk new buildings by signing tenants before completion rather than adding to the unlet stock. Both behaviours are rational responses to the same number.
How occupiers and investors use the vacancy rate
For an occupier, the figure calibrates strategy before the first viewing. Above roughly eight per cent, as in western Slovakia today, the shortlist is long enough to run a genuine competition between landlords – the moment to press on incentives, expansion options and exit flexibility in the lease agreement. Near the eastern Slovak level of 2.66 per cent, the calculus reverses: options are scarce, timing beats bargaining, and a build-to-suit or pre-lease conversation often replaces the search for standing space entirely. For investors and lenders, vacancy is a risk dial: it sets the void assumptions in every cash-flow model, shapes how much speculative development the market will finance, and – read against take-up and pipeline – signals whether a market is tightening toward rental growth or loosening toward incentive inflation. The most common mistake in both camps is reading the level without the direction. A market at six per cent and rising tells a different story from one at eight per cent and falling, even though the snapshot flatters the first.
Frequently Asked Questions
What is a healthy vacancy rate for an industrial market?
There is no universal target, but market practice treats a mid-single-digit figure as balanced: enough empty space for tenants to move and grow, not so much that landlords lose pricing discipline. What matters more than the level is the direction of travel and the pipeline behind it – a moderate figure with heavy speculative completions ahead can loosen quickly.
Does a rising vacancy rate mean rents will fall?
Not mechanically. Landlords typically defend headline rents and give ground through incentives first – longer rent-free periods, bigger fit-out contributions, softer terms – so effective rents fall well before quoted rents move. Prime, well-located buildings can hold their pricing even while the broader market loosens.
Is space under construction included in the vacancy rate?
No. Only physically completed space counts; projects under construction sit in the development pipeline. That is why a wave of speculative completions can push the figure up sharply in a single quarter even when demand is strong – the new space enters the denominator and numerator at once on delivery.
Why do Slovak regions differ so widely?
Because stock, infrastructure and demand are unevenly distributed. Western Slovakia carries the largest concentration of modern space and the most speculative development, so it absorbs supply shocks first; the east has a much smaller modern stock and little speculative building, which keeps its share of empty space structurally low – 2.66 per cent against 10.27 per cent in the west in the first quarter of 2026.
Is a low vacancy rate good news for tenants in any way?
Indirectly, yes: it signals a market landlords trust, which attracts development and future options. But for a live requirement it mostly means acting early – starting the search twelve months or more ahead, considering pre-leases on pipeline buildings, and treating a built-to-suit project as a first-class alternative to hunting for scarce standing space.