Since 1 May 2026, the RE2020 (France's environmental regulation for new buildings) has applied to almost all new commercial buildings. It is a turning point the trade press has covered at length, and it raises a very practical question for clients: how much does it cost, and how do you plan for it? We wanted to unpack this development from our own angle, that of Cost Management & Quantity Surveying.
The article we're unpacking
"From 1 May 2026, RE 2020 will apply to (almost) all new construction" — Le Moniteur, 2026.
Read the source here: the article on lemoniteur.fr.
We summarise the essentials below, before offering our own read. For the full detail, we would encourage you to consult the original article.
What the reform says, in brief
Until now, RE2020 applied only to housing, offices and education buildings. Since May 2026, it has extended to around ten new categories of new commercial building: hotels, restaurants, retail, healthcare facilities, care homes, sports facilities, nurseries, libraries, universities and airport terminals. All told, a large share of the future commercial stock now falls within scope.
In practice, a new project must meet several indicators, adjusted according to the type of building: the quality of the envelope (Bbio), primary energy consumption (Cep), the carbon impact of energy and, above all, the carbon impact of materials and equipment (Ic construction), together with summer comfort (discomfort degree-hours). A few exceptions remain, such as small extensions or temporary structures.
Our read as Quantity Surveyors
Media attention has understandably focused on the technical and environmental side. But for a client, the real question is a budget one: this reform has a cost, and that cost is set at design stage.
The most far-reaching point, to our mind, is the carbon indicator on materials. For the first time on this scale in the commercial sector, it is no longer only the building's operational energy performance that is regulated, but the carbon footprint of what we build. This steers choices towards low-carbon materials — timber, bio-based insulation, low-carbon concrete — whose prices, availability and supply chains are not yet settled. In other words: a new, sometimes volatile variable enters the cost equation of every project.
Three budget impacts to plan for
Without overstating it — RE2020 is a sound and foreseeable regulation — we identify three effects to factor in from the very start of a scheme:
- A possible construction cost premium on certain trade packages, tied to low-carbon materials and high-performance systems (heat pumps, solar thermal). The scale depends heavily on the type of building and the quality of the design.
- A higher design cost, since meeting the thresholds calls for a thorough thermal and environmental study, very early in the project. This is an investment, not an expense: better to make the call on the drawing board than to correct it during the construction phase.
- An effect on asset value, conversely rather favourable: a compliant, low-energy building lets, sells and finances more easily. The initial premium should therefore be read over the whole life cycle, not just the site.
What about refurbishment?
A useful clarification: RE2020 targets new construction, not refurbishment, which remains governed by its own rules. But the spirit of the reform runs through the whole sector, and clients carrying out refurbishments increasingly bear it in mind, if only to protect the value of their asset and its long-term performance. On a major refurbishment, the same logic applies: build the energy and carbon ambition into the cost calculation very early, rather than dealing with it after the fact. The question, then, is not only "am I subject to RE2020?", but "where does my project stand against tomorrow's requirements, and at what price?".
The Quantity Surveyor's role: cost it before it costs you
This is exactly where our discipline comes into its own. A regulation that shifts cost towards the early stages calls for a reliable cost estimate, itself produced early. Our role as Quantity Surveyors is to translate each RE2020 requirement into measurable cost implications, to compare the technical scenarios on a costed basis, and to give the client the visibility they need to weigh up environmental ambition, quality and budget.
Producing cost estimates stage by stage (from sketch to detailed design), drafting technical specifications (CCTP) that clearly incorporate the environmental requirements, analysing contractors' tenders against these new criteria: this is how a regulatory constraint is turned into a controlled budget trajectory, rather than a nasty surprise.
In summary
Extending RE2020 to commercial buildings is not just a technical matter: it is a new economic reality for any client building in Paris and the Île-de-France region. Anticipated well, it is perfectly manageable. Anticipated badly, it is paid for in reworked studies and budgets that overrun. The difference is decided at the moment the project is costed — that is, as early as possible.
Have a commercial scheme caught by RE2020 and want to firm up its budget from the earliest studies? Get in touch: we would be delighted to talk it through with you.