The vacancy rate measures the proportion of office spaces available for letting in a given market or within a real estate portfolio. It is the health indicator of the tertiary market. When it rises, supply exceeds demand; when it falls, the market tightens.
Formula:
Vacancy rate = (Vacant and available surfaces / Total park surface) × 100
The vacancy rate is distinct from the under-occupation rate. Vacancy concerns empty spaces offered for letting, no one occupies them, no one pays rent on them. Under-occupation concerns leased but not fully used spaces, the lease is signed, the rent paid, but the offices are running at 55-65% capacity. Both phenomena overlap, but only vacancy appears in official market statistics.
1. Measure precisely. Distinguish "accounting" vacancy (surfaces without a lease) from "operational" vacancy (surfaces under lease but unused). Both must be addressed, but not with the same tools.
2. Diagnose the causes. Are your spaces empty because the building is obsolete? Because the rent is too high? Because hybrid working has reduced your needs? The cause determines the solution.
3. Reposition your offering. If your spaces have been offered for letting on a classic lease and have not found a taker for 6+ months, the problem is probably the offer, not the demand. The market is asking for flexibility, turnkey solutions, all-inclusive packages. Transforming your empty spaces into operated offices via an operator like Sora means repositioning your offering on the most dynamic segment of the market.
For owners and investors, the vacancy rate is directly linked to the value of the asset.
The basic rule: every point of vacancy above the "natural" level (5-7%) reduces the value of the asset. Investors apply a discount proportional to the estimated duration of the vacancy. A building with 15% vacancy for 18 months will be valued 10 to 20% below a comparable fully occupied building.
The operator's role: by filling vacant spaces via a service contract model, an operator like Sora reduces the vacancy rate, stabilises income and protects the patrimonial value of the asset. An argument that resonates with both owners and main tenants who want to add value to their excess surfaces.
Is your internal vacancy rate weighing on your balance sheet? Estimate the revenue potential of your empty spaces with our savings calculator.
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