---
title: "WELL certification — Class A Atlas glossary"
description: "Health and wellbeing-focused building rating from the International WELL Building Institute."
canonical: https://classa.info/glossary/well-certification
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Health and wellbeing-focused building rating from the International WELL Building Institute.

## TL;DR

- Health and wellbeing-focused building rating from the International WELL Building Institute.
- Tiers Bronze, Silver, Gold, Platinum.

# WELL certification

*ESG · Global*

## Short definition

Health and wellbeing-focused building rating from the International WELL Building Institute.

## Full definition

Tiers Bronze, Silver, Gold, Platinum. Focus on air quality, water quality, lighting, acoustics, materials, and policies that promote occupant wellbeing. Increasingly paired with [leed](/topics/esg-leed-tenants)">LEED on trophy delivery.

## Example

Mori JP Tower (Tokyo) is WELL Platinum; The Henderson (Hong Kong) is WELL Platinum.

## Why this matters for Class A leasing

WELL certification is part of the esg vocabulary that institutional [Class A](/glossary/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

- [LEED](/glossary/leed)
- [Fitwel](/glossary/fitwel)

## Related guides

- [LEED, BREEAM, NABERS: what tenants actually need to know](/guides/esg-leed-breeam-for-tenants)

## Related topics

- [**Hybrid Workplace Strategy**](/topics/hybrid-workplace-strategy) — How to size, structure, and lease a Class A office for a hybrid workforce.
- [**ESG / LEED for Tenants**](/topics/esg-leed-tenants) — How tenants evaluate, negotiate, and report on ESG performance in a Class A office lease.
- [**Trophy Asset Selection**](/topics/trophy-asset-selection) — How to identify and evaluate trophy Class A assets for a flagship requirement.
- [**Workplace Talent Strategy**](/topics/workplace-talent-strategy) — How office location, building tier, and workplace experience shape talent attraction and retention.

---

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