Energy audits and thermal studies in Western France
Neo Étude carries out energy audits, DPE certificates and thermal studies across Normandy, Brittany, Pays de la Loire, Centre-Val de Loire and New Aquitaine — with reports and advice available in English.
Qualifications & insurance
Complete expertise for your property
From the regulated energy audit to heating sizing studies, every assignment rests on calculations rather than rules of thumb.
Regulatory audit for selling a property
Selling a property rated F or G now requires a regulatory energy audit. Neo Étude provides this service for owners selling property in Western France, producing a clear report usable by notaires, agents and buyers.
Learn moreEnergy audit for houses and apartments
The initial energy audit is the starting point for unlocking MaPrimeRénov' and the French éco-prêt. It applies to houses and apartments, in individual or collective housing, and provides the technical diagnosis that underpins renovation aid.
Learn moreIndividual property DPE (French energy performance certificate)
The DPE (diagnostic de performance énergétique) is the French energy performance certificate. It gives a dwelling an energy label and a climate label and is required when selling or letting.
Learn moreCollective DPE for French apartment buildings
The DPE collectif rates a whole apartment building rather than a single flat. It gives co-owners a shared view of performance and feeds directly into planning communal works.
Learn moreCommercial property DPE for offices and shops in France
Offices, shops, practices and workshops run on different hours and equipment from homes. A commercial DPE reflects that, instead of treating the premises like a dwelling.
Learn moreRE2020 thermal study for new buildings in France
RE2020 is the French building regulation for new construction. It sets requirements on bioclimatic need (Bbio), primary energy use (Cep), summer comfort and embodied carbon, so the thermal study belongs at design stage.
Learn moreDecisions based on numbers
A successful energy renovation starts with a reliable analysis of the building and how it is used.
Measured performance
Recommendations from thermal calculations, not from a rule of thumb per square metre.
Lower bills
Targeting the biggest heat losses cuts heating consumption for good.
Comfort & building health
Moisture, ventilation and summer comfort are treated as seriously as insulation.
Independent advice
No ties to installers: our recommendations serve your interests only.
What an assignment looks like
- 01
Initial discussion
A first meeting by video call or on site to identify the study that is genuinely useful.
- 02
Technical survey
On-site survey of the fabric, systems and ventilation, with photographs and supporting documents.
- 03
Calculations & scenarios
Thermal modelling of the building and a costed comparison of improvement scenarios.
- 04
Report & explanation
Delivery of the report in English, an overview of existing French support schemes and the bodies that handle them.
We cover the whole of Western France
Five regions, very different building types and a demanding oceanic climate: our studies reflect the local context.
Frequently asked questions
What is a French DPE?
The DPE is the official French energy performance certificate. It grades a property from A to G for energy use and separately for greenhouse-gas emissions.
Do I need an energy audit to sell a property in France?
A DPE is required for virtually every sale, and a regulatory energy audit is additionally required for the lowest-rated dwellings. Send us the details and we will confirm.
Can Neo Étude assist English-speaking property owners?
Yes. We regularly work with owners living outside France and explain the French process, terminology and next steps in English.
Which areas of Western France do you cover?
Normandy, Brittany, Pays de la Loire, Centre-Val de Loire and New Aquitaine.