---
title: "Expansion right — Class A Atlas glossary"
description: "Hard contractual right to lease specified additional space at a stated trigger date."
canonical: https://classa.info/glossary/expansion-right
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Hard contractual right to lease specified additional space at a stated trigger date.

## TL;DR

- Hard contractual right to lease specified additional space at a stated trigger date.
- A hard expansion right gives the tenant the contractual right to take additional space at one or more pre-defined trigger dates, at pre-agreed (or formula-driven) economics.

# Expansion right

*Lease structure · Global*

## Short definition

Hard contractual right to lease specified additional space at a stated trigger date.

## Full definition

A hard [expansion](/topics/cross-border-expansion) right gives the tenant the contractual right to take additional space at one or more pre-defined trigger dates, at pre-agreed (or formula-driven) economics. The most valuable and most expensive contractual right; negotiate early in the LOI.

## Why this matters for Class A leasing

Expansion right is part of the lease structure 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 occupiers can translate quickly.

## See also

- [Right of first offer (ROFO)](/glossary/right-of-first-offer)
- [Right of first refusal (ROFR)](/glossary/right-of-first-refusal)

## Related guides

- [How to choose a Class A office: a working framework](/guides/how-to-choose-class-a-office)

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