Beyond the Snapshot: Vacancy, Availability, and Absorption as Market Indicators

Vacancy rates are often the first metric referenced when evaluating a commercial real estate market. While useful, vacancy alone provides a limited view of market conditions and can obscure important shifts in demand and supply pressure. To develop a more complete understanding of market health, proactive investors look beyond vacancy to include availability and absorption. When viewed together, these three metrics provide a more forward-looking and behavior-based picture of how a market is functioning.

Vacancy Rate

Vacancy rate represents the total square footage of physically unoccupied space divided by total inventory. It is a direct measure of space that is currently empty and immediately available for occupancy. In other words, vacancy reflects the market’s present condition, what is unoccupied today.

Availability Rate

Availability rate measures all space being actively marketed for lease, divided by total inventory. Importantly, this includes more than just physically vacant space. Availability typically captures physically vacant space currently on the market, space with upcoming lease expirations being marketed in advance, space available for sublease, and early move-outs not yet physically delivered to the market. In practice, availability functions as a forward-looking indicator of supply pressure. It reflects not only what is empty today, but what is expected to compete for tenants in the near term.

Because of this, availability often begins to move before vacancy. Rising availability can signal future upward pressure on vacancy rates even if current vacancy remains stable. Conversely, declining availability can indicate tightening market conditions ahead of any visible change in vacancy. For investors, the distinction between vacancy and availability is important because availability provides a broader view of competitive supply conditions and potential pricing pressure.

Absorption

Where vacancy and availability describe supply conditions, absorption measures demand in action. Absorption can be used in two forms: gross absorption and net absorption. Gross absorption represents the total square footage of space occupied over a given period, regardless of space vacated. Net absorption is more commonly used in market analysis. It is calculated as, total space occupied (move-ins) minus total space vacated over a period. Net absorption effectively measures the change in occupied space within a market over time.

Positive net absorption indicates that demand is exceeding move-outs, resulting in expanding occupancy. Negative net absorption reflects contraction, where move-outs exceed new occupancy. Unlike vacancy or availability, which are snapshots of supply conditions, absorption reflects actual tenant behavior over time. It captures leasing momentum in a way that static occupancy measures cannot.

How These Metrics Interact

While each metric is useful individually, their combined behavior provides a more complete understanding of market direction and leasing conditions. Although they do not produce precise predictions for lease-up timelines, they strongly influence expectations around leasing velocity and pricing power.

High Availability + Weak Net Absorption

This environment typically reflects a competitive leasing market. Space is being added to the market faster than it is being occupied, resulting in:

• Longer time-to-lease expectations
• Increased concessions or flexible lease terms
• Elevated pressure on asking rents

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Rising Availability + Positive Net Absorption

This often signals a market absorbing new supply but still working through incremental inventory increases, which can include:

• Healthy underlying demand
• Ongoing deliveries of new space
• Moderately extended lease-up timelines depending on submarket

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Low Availability + Strong Net Absorption

This combination generally reflects a tightening market where demand is outpacing supply. Typical outcomes include:

• Faster lease execution
• Reduced marketing exposure time
• Increased landlord pricing power

Taken together, vacancy, availability, and absorption help frame both current conditions and directional momentum. Vacancy provides a snapshot of today’s occupancy. Availability introduces a forward-looking view of competitive supply. Absorption reflects actual tenant-driven demand over time. While no single metric can precisely predict leasing timelines, the interaction between vacancy, availability, and absorption provides a reliable framework for interpreting market health and momentum. At Legacy West Partners, these indicators are incorporated into our broader market analysis to evaluate demand trends, underwriting assumptions, and long-term leasing strategy across our portfolio.