The French housing regulations have changed more between 2025 and mid-2026 than in the previous three years. These developments are reshaping the technical decisions of construction professionals, from energy renovation to new design, well beyond the purely aesthetic considerations that most mainstream publications convey.
RE2020 Decree as of July 1, 2026: What Changes in the Design of New Buildings
The new level of the RE2020 decree, applicable since July 1, 2026, tightens carbon emission thresholds throughout the entire lifecycle of constructions. We are seeing a direct impact on the choice of structural materials: low-carbon concrete sectors and hybrid wood-concrete construction systems are gaining market share against traditional solutions.
Optimization also applies to technical lots. Air-water heat pumps and energy recovery double-flow ventilation systems are becoming almost standard in permits submitted since spring. Thermal sizing now conditions the site plan, not the other way around.
For project owners, the difficulty lies in the LCA (life cycle assessment) calculation, which now integrates environmental data of products with finer granularity. Thermal engineering firms must recalibrate their software, and review times are mechanically extending for projects submitted straddling the old and new levels. We are closely monitoring these developments, as shown by the news on Mon Blog Habitat, which regularly covers the implications of these regulatory changes.
Energy Inefficient Homes and Rentals: The Law That Reintroduces F and G Classified Housing
The text adopted by the Senate in 2025 introduces an unprecedented mechanism. Owners of F or G classified housing will be able to rent their property again provided they sign a work contract with a RGE-certified company. This measure could reintroduce nearly 700,000 homes into the national rental market, subject to checks and penalties in case of non-completion of the work.
The technical point to watch concerns the nature of the work contract. It is not a simple declaration of intent: the owner commits to a specific timeline, with verifiable milestones. RGE professionals become de facto co-responsible for meeting deadlines.
Insulation in Historical Centers: ABF Barriers Lifted
For residents of historic city centers, the processes for external insulation and the installation of high-performance joinery have been significantly simplified. The criterion retained by the new regulation is that the architecture is not “seriously distorted”, which opens a much wider field of intervention than before.
In practice, this means that buildings previously blocked by a negative opinion from the Architects of Buildings of France can now undergo thermal insulation work. Aluminum joinery with thermal break, mimicking original wood profiles, is starting to become common in tenders for condominiums located in protected areas.
Geopolitics and Climate: New Criteria in Housing Choice
Real estate market analyses published in 2026 highlight a phenomenon that decor trend articles ignore: geopolitical and climatic events have become explicit criteria for housing choice. Proximity to a flood zone, exposure to heatwaves, or a territory’s energy dependence now weigh in purchasing decisions.
This shift is concretely reflected in real estate mandates. Buyers request the Risk Prevention Plan even before the first visit. Technical diagnostics increasingly include a climate vulnerability analysis, even when regulations do not yet formally require it.
- Exposure to clay shrink-swell is among the top criteria consulted on real estate search platforms, alongside surface area or price per square meter.
- Proximity to resilience infrastructure (secured drinking water network, buried electrical network) is becoming a value-adding argument in rural areas.
- Buyers now view the DPE not as an administrative constraint but as an indicator of medium-term usage costs.
New Building Permits: A Rebound to Be Nuanced
Data from spring 2026 shows a rebound in building permits after several quarters of contraction. We recommend interpreting this signal with caution. The increase is partly explained by a catch-up effect: projects that were frozen during the high-interest period have been resubmitted as soon as financing conditions eased slightly.
This rebound mainly concerns collective housing in tight areas, not dispersed housing in rural sectors. Individual homes remain behind, penalized by land costs and the heightened requirements of RE2020 that increase construction budgets.
ZAN Trajectory and Land Scarcity
The Zero Net Artificialization trajectory continues to constrain the supply of buildable land. Communities that have not yet revised their PLU to integrate ZAN objectives find themselves in a situation of administrative blockage. Urban extension subdivision projects are increasingly often rejected, pushing developers towards the conversion of brownfields and the elevation of existing buildings.
- The conversion of industrial or commercial brownfields now represents a growing share of projects submitted in medium-sized urban areas.
- Wood elevation, facilitated by its structural lightness, is establishing itself as a preferred technical solution for densifying without artificializing.
- Demolition-reconstruction operations, once marginal, are multiplying in aging residential neighborhoods near train stations.
Housing trends in 2026 are less about color palettes and more about regulatory changes and land decisions. The next lever for transformation will likely come from the “housing recovery” bill, whose provisions on the obligation of energy decency could further change the rules of the game for landlord owners before the end of the year.
