---
title: "Availability rate — Class A Atlas glossary"
description: "Vacancy rate plus space currently leased but available for sublease."
canonical: https://classa.info/glossary/availability-rate
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Vacancy rate plus space currently leased but available for sublease.

## TL;DR

- Vacancy rate plus space currently leased but available for sublease.
- Availability is a more honest measure of true market supply than headline vacancy.

# Availability rate

*Market metric · US*

## Short definition

[Vacancy rate](/glossary/vacancy-rate) plus space currently leased but available for [sublease](/topics/sublease-strategy)">sublease.

## Full definition

Availability is a more honest measure of true market supply than headline vacancy. The gap between vacancy and availability widens during downcycles as tenants attempt to offload underused space.

## Why this matters for Class A leasing

Availability rate is part of the market metric vocabulary that institutional [Class A](/glossary/class-a) occupiers, landlords, and advisers use across US markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks the US definition alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly.

## See also

- [Vacancy rate](/glossary/vacancy-rate)
- [Sublease](/glossary/sublease)

---

Citation: Source: Class A Atlas (https://classa.info/glossary/availability-rate), updated 2026-04-01T00:00:00.000Z.