---
title: "Non-disturbance — Class A Atlas glossary"
description: "Lender's promise not to terminate the lease on landlord default."
canonical: https://classa.info/glossary/non-disturbance
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Lender's promise not to terminate the lease on landlord default.

## TL;DR

- Lender's promise not to terminate the lease on landlord default.
- Critical protection: the tenant gets to keep the lease on its existing terms if the lender forecloses, provided the tenant is not in material default.

# Non-disturbance

*Legal · US*

## Short definition

Lender's promise not to terminate the lease on landlord default.

## Full definition

Critical protection: the tenant gets to keep the lease on its existing terms if the lender forecloses, provided the tenant is not in material default. The 'ND' in SNDA.

## Why this matters for Class A leasing

Non-disturbance is part of the legal 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.

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