BACS decree: deadline for 70 to 290 kW buildings moved to 1 January 2030

Many owners of commercial buildings are still working towards 1 January 2027 to install a building management system. For existing buildings whose heating or cooling exceeds 70 kW, that date no longer applies: decree no. 2025-1343 of 26 December 2025 has pushed it back to 1 January 2030. Here is what changes, what stays, and how to use the extra time.

What the decree says

Published in the Official Journal on 27 December 2025, the decree changes the timetable of three obligations for existing buildings:

• building automation and control systems (BACS) in commercial buildings whose heating or cooling output exceeds 70 kW: deadline moved to 1 January 2030;
• room-by-room or zone temperature control: deadline also moved to 1 January 2030;
• insulation of heating and cooling distribution pipework, also postponed.

What does not change

• Buildings above 290 kW have been subject to the obligation since 1 January 2025.
• An exemption is still possible if a study shows that the payback period of a BACS exceeds ten years, after deducting subsidies and energy savings certificates.
• Replacing a heating or cooling system above 70 kW triggers the obligation without waiting for 2030.
• Once installed, the system must be inspected at least every five years.

How to use the extra time

Three years is not long for a BMS project that touches several technical trades and often several buildings. The postponement mainly gives time to do it properly.

1. Take stock

Record the installed output building by building, what already exists in terms of controls and BMS, and what is missing compared with the decree’s requirements: monitoring and recording of consumption by zone, detection of efficiency losses, interoperability, manual override.

2. Link the BMS to the maintenance contract

A poorly operated BMS is of little use. Renewing the multi-technical contract is the right time to decide who operates the BMS, who has access to the data and which indicators are reported each month.

3. Document the exemption before relying on it

The payback calculation must be based on real quotes and quantified savings. A poorly documented exemption offers little protection in the event of an inspection.

4. Think about the tertiary decree too

Data collected by the BMS also helps track the consumption reduction trajectory declared on the OPERAT platform.

This is the work we do in our audit and maintenance tender assignments.