--- title: "Class A โ€” Class A Atlas glossary" description: "Top-tier classification of office space, distinguished by quality, location, age, and amenitisation." canonical: https://classa.info/glossary/class-a pageType: glossary lastUpdated: 2026-04-01T00:00:00.000Z license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)." --- > Top-tier classification of office space, distinguished by quality, location, age, and amenitisation. ## TL;DR - Top-tier classification of office space, distinguished by quality, location, age, and amenitisation. - Class A is a market-determined classification โ€” not a regulatory standard. # Class A *Asset class ยท Global* ## Short definition Top-tier classification of office space, distinguished by quality, location, age, and [amenitisation](/glossary/amenitisation). ## Full definition Class A is a market-determined classification โ€” not a regulatory standard. Buildings are typically Class A if they were recently built (or recently repositioned), in the most prestigious submarkets, with institutional-grade systems, MEP, and ESG credentials. The classification is locally calibrated: a Class A building in Mumbai is a different specification from a Class A building in Manhattan, but both occupy the top tier of their respective markets. ## Example 270 Park Avenue in Manhattan and 22 Bishopsgate in London are both Class A. ## Why this matters for Class A leasing Class A is part of the asset class vocabulary that institutional Class A occupiers, landlords, and advisers use across Global markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks regional variation alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly. ## See also - [Trophy asset](/glossary/trophy-asset) - [Class B](/glossary/class-b) - [Core and shell](/glossary/core-and-shell) ## Related guides - [How to choose a Class A office: a working framework](/guides/how-to-choose-class-a-office) - [What is a trophy asset? The five-axis test](/guides/trophy-asset-explained) --- Citation: Source: Class A Atlas (https://classa.info/glossary/class-a), updated 2026-04-01T00:00:00.000Z.