---
title: "Décret tertiaire — Class A Atlas glossary"
description: "France's Tertiary Sector Decree mandating progressive office energy reductions."
canonical: https://classa.info/glossary/decret-tertiaire
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> France's Tertiary Sector Decree mandating progressive office energy reductions.

## TL;DR

- France's Tertiary Sector Decree mandating progressive office energy reductions.
- Mandates 40% energy reduction by 2030, 50% by 2040, 60% by 2050 (versus a 2010 baseline) for buildings over 1,000 sqm.

# Décret tertiaire

*Tax / regulatory · EU*

## Short definition

France's Tertiary Sector Decree mandating progressive office energy reductions.

## Full definition

Mandates 40% energy reduction by 2030, 50% by 2040, 60% by 2050 (versus a 2010 baseline) for buildings over 1,000 sqm. Non-compliant assets face a real and rising market risk.

## Why this matters for Class A leasing

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

## See also

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

## Related topics

- [**ESG / LEED for Tenants**](/topics/esg-leed-tenants) — How tenants evaluate, negotiate, and report on ESG performance in a Class A office lease.

---

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