---
title: "Demising walls — Class A Atlas glossary"
description: "Walls separating one tenant's space from another's or common area."
canonical: https://classa.info/glossary/demising-walls
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Walls separating one tenant's space from another's or common area.

## TL;DR

- Walls separating one tenant's space from another's or common area.
- Landlord typically delivers demised in core-and-shell condition.

# Demising walls

*Construction · Global*

## Short definition

Walls separating one tenant's space from another's or common area.

## Full definition

Landlord typically delivers demised in core-and-shell condition. Modifications during [fit-out](/topics/fit-out-capex)">fit-out often require landlord consent due to fire-code and structural impact.

## Why this matters for Class A leasing

Demising walls is part of the construction 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.

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