Why Premium Warehouse Rents Rise Amidst a Rising Nominal Industrial Vacancy Rate

Across major global logistics markets, recent commercial real estate indicators show a marked divergence between macro indices and micro portfolio performance. According to multiple global brokerage estimates, the national or global headline industrial vacancy rate has expanded to a range of 6.7% to 7.2% (with Cushman & Wakefield reporting 6.9% at midyear 2026 and Prologis tracking the wider U.S. market at 7.2%).

Conversely, leading logistics REITs continue to post historically tight operations. For instance, Prologis closed out Q2 2026 with portfolio occupancy at 95.5%, underpinned by a strong 36.9% net effective rent change from multiyear lease renewals.

To understand why rental growth remains resilient amidst a rising nominal vacancy rate in industrial sector reports, we must examine the friction between headline vacancy and functional vacancy (or effective availability).

Why Did Airfreight Rates Rise So Fast?

Global air cargo volume increased only 4%, but the dynamic load factor rose to 61%.

The dynamic load factor measures how much available aircraft space is being used based on both cargo weight and volume. A higher load factor means less available space, which makes airfreight rates easier to increase.

Defining the Divergence: Headline vs. Functional Vacancy

To analyze the current industrial vacancy rates, institutional investors must distinguish between two metrics:

• Headline Vacancy (Nominal): This metric aggregates all unleased industrial square footage on the market, including obsolete, poorly located properties that no longer align with modern logistics grids.

• Functional Vacancy (Effective Availability): This measures only modern, operational Class A logistics assets that possess the specifications required for immediate occupier integration.

While the nominal industrial real estate vacancy rate sits near 7%, industry estimates suggest that the effective availability of premium, highly functional Class A facilities is much tighter, widely believed to hover in the mid-4% range.

Three Structural Drivers of Market Divergence

Three fundamental supply-demand dynamics sustain the gap in the commercial industrial vacancy rate:

1. Functional Obsolescence of Legacy Inventory

A significant portion of the vacant square footage inflating the vacancy rate of industrial buildings is structurally obsolete. Modern supply chains require high-spec Big-Box warehouses typically featuring 36-foot clear heights or higher and ESFR sprinkler systems to accommodate vertical racking and automation-intensive logistics or robotics-enabled facilities. Legacy Class B/C warehouses cannot support these systems, leaving them functionally vacant while prime spaces remain fully utilized.

2. The Supply Cliff Tightening Availability

Elevated capital costs from 2023 through late 2025 led to a severe construction starts slump. With speculative construction frozen, the market is experiencing a decline in new completions in 2026. Rather than directly accelerating absorption, this lack of new inventory is tightening the availability of premium logistics space and leaving occupiers with fewer Class A options.

3. High-Power and Power-Ready Infrastructure

In 2026, the competitive differentiator for a mega-box distribution center has shifted from location to grid utility. Driven by the expansion of AI infrastructure, advanced manufacturing, and nearshoring initiatives, occupiers are prioritizing power-ready or heavy-power industrial facilities. Sites equipped with substation access and redundant electrical capacity are leased rapidly, whereas power-constrained assets face prolonged marketing periods.

The Mark-to-Market Rent Capture

Landlords of premium logistics assets retain substantial pricing leverage due to lease maturity schedules. As 5-to-10-year leases signed during historical low-rent periods reach expiration, the lease rollover spreads allow REITs to capture significant embedded growth. This mark-to-market rent capture explains why leading portfolios continue to record double-digit embedded rent growth despite rising macro vacancy figures.