OPERAT platform: energy reporting for commercial buildings on the ADEME platform

From 1 July 2026, the annual certificate generated by ADEME's OPERAT platform is attached to every commercial lease and every sale. At the same moment, ADEME disclaims all responsibility for the quality of the data reported: open data published without climate correction, only 55% of filings judged reliable. Data that nobody guarantees is therefore becoming a transaction document on the property market. This article unpacks the Décret tertiaire (France's energy reduction mandate for commercial buildings), energy consumption reporting on OPERAT, and the paradox nobody explains to you.

OPERAT and the Décret tertiaire: the regulatory framework for energy reporting

What does OPERAT stand for, and what is ADEME's role?

OPERAT stands for Observatoire de la Performance Énergétique, de la Rénovation et des Actions du Tertiaire (observatory of energy performance, renovation and action in the commercial sector). ADEME, the French agency for ecological transition, runs the platform on behalf of the State and collects the consumption of every commercial building covered by the decree. Its mission: collect and publish. Not correct, not guarantee. The agency performs only a "broad consistency check" and "cannot under any circumstances be held responsible for the quality of the data submitted to it" (source: ADEME open data page / data.gouv.fr). An observatory that disclaims all responsibility for what it observes. The whole article follows from that detail.

How do OPERAT and the Éco Énergie Tertiaire scheme fit together?

The Éco Énergie Tertiaire scheme (DEET) is the regulatory framework requiring commercial buildings to cut their consumption. OPERAT is its tracking tool: an administrative register where every obligated party files its data. The distinction sounds byzantine; it is not. The DEET sets the targets and the legal obligations. The OPERAT platform checks that compliant filings have been made. It controls nothing, recommends nothing, warns you about nothing. Anyone presenting "OPERAT compliance" to you as an energy performance project is confusing the register with the engine.

What does the ELAN law require of commercial buildings?

Article 175 of the ELAN law (law no. 2018-1021) creates the regulatory obligation to cut energy consumption across commercial buildings. The text is codified in the French building and housing code (articles L.174-1 and R.174-22). Putting it into practice sets the tempo: the decree on 23 July 2019, OPERAT launched in 2020, the platform fully operational only in January 2022. Three and a half years between the text and the tool. That rhythm is about to repeat itself.

What reduction targets does the Décret tertiaire set?

The Décret tertiaire sets three reduction milestones against a baseline year chosen between 2010 and 2019:

1. -40% by 2030
2. -50% by 2040
3. -60% by 2050

There are two routes to compliance: the relative value (a percentage against consumption in the baseline year) or the absolute value (a threshold in kWh/m² set by activity category and climate zone). Choosing the baseline year is the first strategic decision in the file, so much so that the whole of 2023 was reopened to allow it to be changed (source: ADEME calendar).

Who has to file on OPERAT, and what are the deadlines?

The 1,000 m² commercial floor area threshold

Article R.174-22 of the building code sets the criterion: any building or group of buildings in commercial use with a cumulative floor area of 1,000 m² or more is covered. The threshold is assessed per building, part of a building or group of buildings on a single site, not per legal entity. An owner with three 400 m² commercial units in the same building is covered if the total reaches the threshold. Offices, retail and education premises are the most heavily represented categories in the reported stock.

What is an EFA, and how should it be scoped?

The EFA, entité fonctionnelle assujettie (the in-scope functional entity), is the basic reporting perimeter. Each EFA corresponds to a company registration number (SIRET) tied to a building and an activity category. On paper it is simple. In multi-tenant situations, double counting and floating perimeters are the norm: who reports the common areas? Who carries the shared plant room? The consultants who run these campaigns describe a concept that is "hard to grasp" for a good share of the businesses covered.

Did you know? In multi-tenant situations, the share of incomplete or incorrect filings is said to reach 90% according to the consultants who support obligated parties. A botched EFA breakdown skews the reduction trajectory from the outset.

The annual reporting calendar and the 30 September deadline

The annual filing of consumption for year N must be submitted before 30 September of year N+1: that is the regulatory deadline. On 30 September 2021, the day of the very first deadline, the decree postponing it by a year was published in the Official Journal (source: Le Moniteur). Same again in 2022: after weeks of rumours, on 22 September the ministry announced a grace period until 31 December, eight days before the deadline. A platform chasing its own calendar. Picture an obligated party telling the prefect on 22 September that it will file three months late.

Did you know? 2026 has two separate deadlines that must not be confused: on 1 July, the certificate must be displayed and attached to leases and deeds of sale; on 30 September, you file your 2025 consumption. The first assumes tenant data collected ahead of signature.

What the order of 1 August 2025 changes: digital certificate and mandatory display

The order of 1 August 2025 transforms the scheme. The fixed certificate template in the annex disappears: the digital certificate is now generated directly by the platform. Transitional phase until 1 July 2026: assessment and display are optional. After that date, display becomes mandatory and the assessment of compliance, based on the latest annual certificate, is attached for information to every lease and, in the case of a sale, to the preliminary or final sale agreement (article L.174-1 II of the building code). The rating runs from a grey leaf to three green leaves, across five levels. The same text introduces new activity categories and adjusts the climate coefficients (source: order of 1 August 2025, Légifrance).

Combined deadlines table: Décret tertiaire, BACS decree and display obligations

Three regulatory threads overlap without coordinating with each other. The table below cross-references their deadlines to show the triple calendar every commercial obligated party faces.

The most common confusion: the Décret tertiaire and the BACS decree are two separate texts with different targets and different timelines. The first sets consumption reduction targets. The second mandates a level of building automation. They converge in 2030, when both obligations stack up for buildings in the 70 to 290 kW range.

Filing on OPERAT: the 4 steps of data entry

Step 1: create an account on the OPERAT platform

The OPERAT platform is available online at operat.ademe.fr. Each user creates an owner or tenant profile tied to their company number (SIREN). The obligated structure (SIREN) holds the functional entities (SIRET). Without that link, no filing is possible. One piece of advice: attach the profile to the right SIRET before adding a single EFA. It is the most expensive mistake to unwind at the end of a campaign.

Step 2: declare your in-scope functional entity

Each EFA corresponds to a SIRET perimeter tied to a building and an activity category. Since 2025, filing is based on the national building reference system (ID-RNB), which replaces free-text naming. Until then, everyone named their building however they liked, with the duplicates you would expect. This link makes it possible to consolidate data across consistent perimeters and to limit discrepancies between OPERAT and what is actually on the ground.

Step 3: enter energy consumption

The data entry covers energy consumption broken down by end use and by energy source. The obligated party has to enter:

• the floor area of the EFA
• consumption by energy carrier (electricity, gas, district heating)
• the baseline year chosen between 2010 and 2019

Three entry methods coexist: a manual interface, CSV import and an API. The API, promised for the second quarter of 2023, went live in the summer. Take-up remains marginal according to the first review. In other words, in the age of the smart meter, most commercial buildings are still keying in invoices by hand.

Step 4: validate the filing and obtain the annual certificate

Once validated, the platform generates the annual certificate. Since the order of 1 August 2025, that document is produced directly by OPERAT: the fixed template in the annex has gone. The rating runs from a grey leaf to three green leaves across five levels, with an envelope band of plus or minus 10% around the trend line. That certificate, which shows the trajectory achieved against the regulatory target, is the document attached, for information, to every lease and every deed of sale.

Is your OPERAT data reliable? The 5 warning signs on your meters

Penalties and the limits of OPERAT: what the platform does not do

Fines and the name-and-shame principle

Article R.185-2 of the building code sets out an escalation: if no filing is made, the prefect issues a formal notice giving three months, then publishes on a State website the list of formal notices that went unheeded. The administrative fine, 1 500 € for individuals and 7 500 € for legal entities, applies only where targets are missed and no action plan exists after two formal notices, or where a failure is established. The amount stays low. The real lever is name and shame: publishing the name of the company at fault. For a property company or an asset manager, seeing your name published as a poor performer weighs far more heavily than €7,500.

What mandatory display of the certificate changes for obligated parties

From 1 July 2026, the annual certificate becomes a transaction document. It is attached to every new lease and every sale, and displayed somewhere visible and easily accessible. A grey leaf is no longer an internal indicator: it is a market signal. A prospective occupier, an investor or a buyer reads the energy performance of the asset straight off it. What was an administrative datum becomes a factor in the value of the asset. Nothing rules out what comes next: a public, standardised, annual document, exactly the kind of rating an insurer or a lender ends up writing into its terms.

The limits of OPERAT as an energy tracking tool

The "O" in OPERAT stands for Observatory. The "A" stands for Actions. Yet the platform collects nothing but gross annual kWh, self-reported. No monthly granularity. The climate correction (the adjustment that neutralises the effect of the weather) is applied only to the calculation of the regulatory trajectory (article R.174-29 of the building code); the open data published by ADEME, for its part, is not corrected. No trace of the actions taken. An observatory that observes little, and actions nobody tracks.

The 2024-2025 review published in May 2026 reports -26% in climate-adjusted consumption across the reported stock since the baseline years. Once the weather effect is neutralised, nobody knows whether that fall comes from restraint, from work carried out, or from post-Covid home working. The annual interval makes it impossible to tell: a monthly curve would distinguish an emptied building from an optimized one. And on the open data, ADEME acknowledges that it is "not climate-corrected for the time being" (source: ADEME / data.gouv.fr). As for the 55% of filings judged reliable and the third of the stock that files nothing at all (source: ADEME review, 2026), together they undermine any statistical reading of the sector.

Regulatory compliance is not energy control. OPERAT checks that a filing has been made. It does not detect consumption drifting during the year. It does not distinguish a real gain from a weather artefact. A building can show a decent rating on the platform and overconsume day after day without anyone seeing it. What is missing: an energy management service able to measure, correct and control continuously - not once a year.

Did you know? Even ADEME's other tools keep their distance. Asked how it links to OPERAT, Territoires en Transitions answers: "None for the time being. OPERAT data covers only some buildings and remains incomplete" (source: ADEME, 2026).

Moving from filing to a real cut in consumption

The approach is always the same. Make the building data trustworthy first: check that the meters work, that the EFA perimeters are correct, that the BMS history has no gaps. Then analyse the drift. Then define an action plan whose implementation produces a real, measurable reduction, not a reporting artefact. Every gain must be auditable against a repeatable protocol.

What Foobot brings to parties covered by the Décret tertiaire

BMS Advisory: making the data trustworthy before you report it

The Foobot BMS audit starts with the meters. Disconnections, data gaps, duplicates, invisible drift: every anomaly found distorts what is entered on OPERAT. The reliability work our teams carry out produces three concrete deliverables:

• verification of the EFA perimeter (removing double counting)
• diagnosis of the gaps between the main meter and the sub-meters
• a remediation plan for faulty measurement points

This advisory work lays a foundation of reliable data before each annual filing. In one new building we have already found 230 unusable sub-meters. Better to discover that before filing than after.

AI Control: cutting HVAC consumption with no building works, through the existing BMS

Foobot AI Control trains a bespoke digital twin on BMS history, weather data and real occupancy. The AI applies predictive control every 15 minutes, 24/7, on the building's HVAC. Gains are measured under the IPMVP protocol with degree-day correction. At Valeo: -28.6% HVAC consumption, measured under that protocol. Active energy management of this kind cuts the kWh reported on OPERAT, with no building works. The figure applies to that building, not as a generic promise: the potential of yours is quantified after an audit, on your own historical data.

AI Optimal Start: restarting each zone at the right moment to avoid waste

AI Optimal Start recalculates the HVAC restart time every day, zone by zone rather than for the building as a whole. It factors in thermal inertia, the day's weather and forecast occupancy. Every kWh wasted by restarting too early ends up in the annual filing on the OPERAT platform. Controlling the restart zone by zone directly improves the energy performance you report.

FAQ - OPERAT