---
title: "DEC (Display Energy Certificate) — Class A Atlas glossary"
description: "UK operational energy rating for public buildings — A-G scale."
canonical: https://classa.info/glossary/dec
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> UK operational energy rating for public buildings — A-G scale.

## TL;DR

- UK operational energy rating for public buildings — A-G scale.
- Operational counterpart to the EPC, focused on actual measured energy use rather than design intent.

# DEC (Display Energy Certificate)

*Tax / regulatory · UK*

## Short definition

UK operational energy rating for public buildings — A-G scale.

## Full definition

Operational counterpart to the EPC, focused on actual measured energy use rather than design intent. Required to be displayed in public buildings over 250 sqm.

## Why this matters for Class A leasing

DEC (Display Energy Certificate) is part of the tax / regulatory vocabulary that institutional [Class A](/glossary/class-a) occupiers, landlords, and advisers use across UK markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks the UK definition alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly.

## See also

- [EPC (Energy Performance Certificate)](/glossary/epc)

---

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