On 1 May 2026, France quietly extended RE2020 — its flagship environmental construction standard — to hotel buildings and a further ten categories of tertiary real estate. For buyers of new-build ski properties in the French Alps, the timing matters. Every tourism residence and managed ski apartment approved for construction from this date must now meet the full RE2020 framework, including mandatory carbon lifecycle assessment and progressive tightening thresholds running to 2031. Understanding what that means in practice is no longer optional — it affects what you pay, what you get, and how easily you can rent the property out.
What RE2020 Actually Requires
RE2020 (Réglementation Environnementale 2020) replaced the older RT2012 thermal standard and has applied to new residential buildings — including tourism residences with sleeping, kitchen and sanitary facilities — since 1 January 2022. Where RT2012 measured only energy consumption, RE2020 goes further: it assesses the full-lifecycle carbon footprint of a building from raw materials through demolition. Construction materials alone account for 60 to 90% of a building's total carbon impact, which is why RE2020 pushes developers towards timber frames, bio-sourced insulation and locally sourced stone rather than standard concrete-and-steel construction.
The key regulatory indicators include primary energy consumption (expressed in kWh/m²/year), a carbon footprint score (Ic énergie and Ic construction), and a summer comfort assessment (the DH indicator). A new building compliant with RE2020 must deliver at least 30% lower energy consumption than an equivalent RT2012 building, with lifecycle CO₂ emissions reduced by around 40% over a 50-year period. In the French Alps, where heating bills in older chalets can run to several thousand euros per winter, that is a material difference.
What Changed on 1 May 2026
The May 2026 decree extended RE2020 to tertiary buildings that had previously operated under looser rules. The ten newly covered categories include hotels, restaurants, sports facilities, nursing homes and airport terminals. For the ski property market specifically, the critical addition is hotel-category buildings — the four- and five-star résidences-hôtelières and apart-hotels that have become the dominant new-build format in resorts such as Val d'Isère, Méribel and Courchevel. Any such project whose building permit is lodged from 1 May 2026 must now demonstrate full RE2020 compliance before works can begin.
This was flagged by the Ordre des Architectes earlier this year and confirmed by Le Moniteur. In practical terms, it closes the last significant gap in the French new-build regulatory framework. Any developer marketing an off-plan ski residence launched after this date must — legally — be building to RE2020 standards, and buyers can insist on seeing the relevant building-permit documentation as confirmation.
The Cost Impact for Buyers
RE2020 compliance adds to build costs, and developers pass that on. Studies converge on an uplift of 5 to 10% versus a comparable RT2012 project. The Rivaton report, commissioned by the French government and published in late 2025, estimated that the full regulatory trajectory — including the tighter carbon thresholds coming in 2028 and 2031 — will result in an 11% cumulative construction cost increase by 2035.
In a market where new-build prices in the northern Alps already average around €6,400/m² — and exceed €12,000/m² in prime Val d'Isère — that uplift is absorbed differently across the price spectrum. In mid-market resorts such as Serre Chevalier or Les Deux Alpes, developers are adjusting specification rather than simply adding to the list price: timber-framed structures, heat-pump systems, and better glazing replace the older formula of gas boilers and standard mineral-wool insulation. In ultra-prime resorts the RE2020 premium is effectively invisible against the base price, but the quality benchmark it sets is increasingly used as a marketing differentiator.
There is an important offset for buyers using the LMNP VAT-recovery route: the 20% TVA rebate on a new-build purchase still applies regardless of RE2020 compliance level. The standard is a construction requirement, not a fiscal one, so the purchase tax structure is unaffected.
Why This Matters for Rental Eligibility and Resale
The link between RE2020 and rental eligibility is indirect but significant. France's DPE (Diagnostic de Performance Énergétique) is the instrument that directly governs whether a property can be legally rented. Since the 2026 DPE changes for mountain properties, anything rated G cannot be let, and F-rated properties face restrictions from 2028. RE2020-compliant new builds typically achieve DPE ratings of A or B, placing them well clear of any current or forthcoming rental ban. That is not incidental — it is a structural advantage over resale stock built before 2012.
On resale, the trajectory is equally clear. Buyers are already factoring energy ratings into offers on older properties, and the gap between A/B-rated stock and C/D-rated equivalents is widening. A RE2020 apartment bought off-plan today will be competing for resale buyers against a market where older stock is progressively restricted or requires expensive retrofitting. The arithmetic favours the new build over a 10-to-15 year horizon, particularly for investors relying on rental income to service holding costs. The broader market data supports this: French Alps mountain property prices rose approximately 3.5% in the six months to October 2025, with premium-specification new builds outperforming the average.
The Tightening Timeline: 2025, 2028, 2031
RE2020 is not a fixed standard. The Ic construction carbon threshold — which caps the carbon embodied in building materials — tightens in three stages. The 2025 threshold is already in force; 2028 and 2031 will progressively lower the permitted carbon ceiling, pushing developers further towards low-carbon structural systems. Projects currently at permit stage are designed to meet the 2025 threshold. If you are buying off-plan with a delivery date of 2028 or beyond, the building will need to comply with the 2028 threshold — something to confirm with the developer before signing the reservation agreement.
The Ordre des Architectes has published the confirmed threshold values for each stage. In practical terms, the 2028 step will push mainstream Alpine developers further towards cross-laminated timber (CLT) structures and away from concrete frame construction — a shift already visible in resorts such as Morzine, Vaujany and La Chapelle-d'Abondance, where several recent projects have used timber as the primary structural material.
What to Check When Buying a New-Build Off-Plan
RE2020 compliance is legally required but not always clearly communicated in marketing brochures. When reviewing an off-plan project, ask the developer or agent for the following:
- The building permit date — any permit lodged after 1 January 2022 for a residential or tourist-residence building must comply with RE2020. Post-1 May 2026 permits for hotel-category buildings must also comply.
- The RE2020 study (étude thermique RE2020) — the technical document produced by the thermal engineer, showing the projected energy and carbon scores. Reputable developers make this available on request.
- The projected DPE rating — new builds are issued with a DPE on completion. Ask for the estimated rating at the design stage; A or B is the target for a properly RE2020-compliant building.
- The structural system — timber frame and bio-sourced insulation will typically score better on the Ic construction indicator than conventional concrete and polystyrene.
- The heating system — RE2020 effectively rules out gas boilers as the primary heat source. Heat pumps (pompes à chaleur), collective district heating (réseaux de chaleur) and electric systems with renewable generation are the standard solutions. For a ski property rented under the managed-leaseback model, the service charges associated with the heating system matter as much as the upfront spec.
The Bottom Line for French Alps New-Build Buyers
RE2020 is now the baseline for virtually all new construction in France. For buyers in the French Alps, the May 2026 extension to hotel-category buildings closes a gap that previously allowed some premium resort developments to sidestep the full standard. From this point, a new-build ski property — whether a studio in a mid-mountain residence or a four-bedroom apartment in a managed alpine lodge — must meet the same environmental framework.
The practical consequences are positive for buyers: lower energy bills, stronger DPE ratings, protection against future rental restrictions, and a competitive advantage at resale. The construction cost premium — broadly 5 to 10% against older standards — is the price of that durability, and in a market where new-build stock in the northern Alps commands a significant premium over resale already, it is a cost the market has consistently been willing to absorb.
If you are assessing off-plan projects and want to understand how RE2020 affects the specific developments currently on the market, our team can walk you through the technical documentation — start here or browse current new developments for a comparison.
