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Sustainability10 November 20266 min

Is coworking really greener than a traditional office? Our numbers, straight from the meter

A numbers-based answer, straight from the meter: 61.9 kWh/m² per year at Zecoworking Courbevoie, already below the French 2030 tertiary decree target and half the office average. Charts and sources.

Every office provider calls itself « eco-friendly ». Almost none publishes a number. At Zecoworking, the answer fits in one reading from our own meter: 61.9 kWh/m² per year, common areas included. That is already below the 2030 target set by France’s tertiary-sector energy decree, and about half the average of Paris-region offices. Here are the numbers, their sources, and why coworking starts with a structural head start.

61.9 kWh/m²2025 consumption, common areas included
-9.1%electricity over the last 12 months
90.4%non-fossil electricity
53refurbished chairs, zero new furniture

Why coworking starts with a structural advantage

A traditional 10-person office drags along a meeting room that sits empty 90% of the time, a coffee machine, a printer, square metres of circulation, heating and cooling running for unoccupied rooms. In a coworking space these areas and appliances are shared by every company on the floor: here, one meeting room, one phone booth and one kitchen serve 53 workstations. Every square metre and every kWh works several times over.

That is the industry’s classic argument, and it is fair. But an argument is not a measurement.

Our numbers, straight from the meter

The Zecoworking space has its own meter, read by the grid operator Enedis. Over the 12 months to the end of August 2026 it shows 18,240 kWh, which is 9.1% less than the previous period. Adding the space’s share of the building’s common areas, total energy intensity comes to 61.9 kWh/m² in 2025, down from 89.6 in 2024.

Annual office electricity consumption, kWh/m²

Final energy. Zecoworking: metered, space + share of common areas.

Zecoworking, 2025 (metered)61.9
France's 2030 tertiary decree target (offices)107
New Paris-region offices (2014-2019)119
Average of offices tracked by OID (2024)126
Refurbished Paris-region offices191
Sources: Enedis readings and 2024-2026 invoices; French order of 24 November 2020 (tertiary decree, standard offices); OID 2025 barometer; DRIEAT Île-de-France, 2022.

How to read it: the blue bar is us, today. The grey bars are the market and regulatory benchmarks. The target the tertiary decree sets offices for 2030, we are already 42% below. And we publish the method: no estimate, no flattering scope, just the meter, the invoices and the certified floor area.

Where the electricity comes from

Consuming little is half the story. The other half is what you consume. Our supplier’s mix is 90.4% non-fossil:

Origin of the space's electricity

Nuclear80.5%
Renewable9.9%
Fossil9.6%
Supplier mix as stated on the invoice, matching the residual mix published by Powernext.

As a result, the electricity-related emissions of the whole space, common areas included, amount to 1.20 tonnes of CO2e per year. Spread over 53 workstations, that is about 23 kg per desk per year: we devoted a full article to that calculation.

What it changes for your company

  • A CSR report that writes itself: your offices stop being an empty box. You can quote measured, sourced, verifiable figures.
  • Costs under control: the energy we do not consume is energy you do not pay for in your package.
  • No regulatory burden to carry: tracking the site’s energy is our job, not yours. France’s tertiary decree may apply to you: in coworking, the question disappears.

The full method, item by item (heat-recovery ventilation, presence-controlled lighting, per-office air conditioning), is detailed in our article on cutting consumption. And if you want to check for yourself, the simplest way is to book a visit: our available offices are 10 minutes from La Défense.