The RE2020 environmental regulation, which came into force in 2022, has fundamentally reshaped new-build construction rules in the Alpes-Maritimes (06) and Var (83). Whether you are a homeowner, developer or investor in Antibes, Cannes, Grasse, Nice or Toulon, this standard now imposes far stricter energy and carbon performance requirements than the previous RT2012. The goal: reduce the building’s environmental footprint while guaranteeing summer comfort suited to the Mediterranean climate.
The pillars of RE2020
RE2020 is built around three main pillars: energy performance, environmental performance (life cycle analysis) and summer comfort. Unlike RT2012, it does not simply cap energy consumption — it assesses the carbon impact of materials and equipment across the building’s entire life cycle.
- Bbio: bioclimatic need, capped according to climate zone and altitude.
- Cep: primary energy consumption, with progressively tightening thresholds.
- DH: discomfort degree-hours in summer, a key indicator for the South-East of France.
- Ic energy: carbon impact linked to energy consumption.
- Ic construction: carbon impact of materials and construction.
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Summer comfort: a priority in PACA
In the Alpes-Maritimes and Var, sweltering summers make the DH (degree-hours) criterion especially sensitive. RE2020 requires limiting indoor temperatures without systematically relying on air conditioning. This calls for smart architectural choices: window orientation, solar shading, thermal mass and natural night-time ventilation. In Nice or Toulon, a poorly designed home can quickly exceed regulatory thresholds, resulting in non-compliance.
Impact on materials and construction methods
Life cycle assessment (LCA) favors bio-based or geo-sourced materials: timber, hemp, raw earth, low-carbon concrete. Traditional construction using concrete blocks or reinforced concrete must now incorporate optimizations to remain competitive. In Grasse or Antibes, new-build projects must demonstrate a controlled carbon footprint, or risk permit refusal or additional costs.
Technical equipment is also evolving: heat pumps, thermodynamic water heaters, dual-flow ventilation, and self-consumption solar photovoltaics. RE2020 encourages local renewable energy production — a real advantage in a region with abundant sunshine.
Consequences for homeowners and professionals
For homeowners, RE2020 means new homes that are more energy-efficient and more comfortable in summer, but also a higher upfront construction cost. For real estate professionals, it becomes a selling point: a RE2020-compliant property offers lower running costs and greater climate resilience.
Diagnosticians and building experts play a key role: verifying certificates, checking indicators, and supporting developers. Cassini Expertise regularly operates in Cannes, Nice, Toulon and throughout the 06 and 83 departments to audit the RE2020 compliance of new-build projects.
Points requiring attention and checks
- RE2020 compliance certificate mandatory upon handover.
- Thermal calculations carried out by an accredited engineering firm.
- Compliance with DH, Bbio, Cep and Ic thresholds.
- Material traceability for the life cycle assessment.
- Airtightness and ventilation tests.
- Boundary surveying and land division 2026 in the Alpes-Maritimes
- Amicable vs court-ordered expert assessment: what’s the difference?
- Building expert vs insurance expert: what’s the difference?
- CCMI construction defects: possible legal remedies
- How to read a crack survey report
- Buying a cracked house in the Alpes-Maritimes: prior expert assessment
- Energy performance certificate (DPE) 2026 in the 06 and 83: new rules and diagnostics
- My neighbor has a direct view into my property: is it legal?
- My neighbor accuses me of encroaching on their land: who is right?
- Creaking beam and vibrating floor: excessive deflection, what to do?
- Doors and windows no longer closing properly: is the house subsiding?
- I knocked down a wall without a survey: was it load-bearing? What to do?
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A compliance failure can lead to reservations at handover, or even difficulties obtaining structural damage insurance (dommages-ouvrage). It’s best to plan ahead from the design stage.
Conclusion
RE2020 is redefining new-build construction standards in the Alpes-Maritimes (06) and Var (83). In Antibes, Cannes, Grasse, Nice and Toulon, projects must now combine energy performance, low carbon impact and summer comfort. Homeowners and professionals alike benefit from working with experts to secure their projects. Cassini Expertise — 04 22 46 06 04 — Serving the Alpes-Maritimes and Var. Get a quote for intervention anywhere in the 06 and 83 departments.
Go further
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- Amicable vs court-ordered expert assessment: what’s the difference?
- Building expert vs insurance expert: what’s the difference?
- CCMI construction defects: possible legal remedies
- How to read a crack survey report
- Buying a cracked house in the Alpes-Maritimes: prior expert assessment
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- My neighbor has a direct view into my property: is it legal?
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- Creaking beam and vibrating floor: excessive deflection, what to do?
- Doors and windows no longer closing properly: is the house subsiding?
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Cassini Expertise
Expert du bâtiment indépendant — Antibes (06·83·13·40)
📅 Mis à jour le 25/09/2026 — Cassini Expertise, expert bâtiment indépendant (06·83·13·40).