Check your DPE in 30 seconds
Enter your DPE number or address — we cross-check it against official ADEME data and the 3CL method, instantly.
No DPE number? Enter your address — we’ll find it for you.
Energy label, A to G
- A
- B
- C
- D
- E
- F
- G
14M+
ADEME diagnostics
1. Search
DPE number or address.
2. Analyze
3CL method + ADEME data.
3. Act
Anomalies, discount, works.
9 DPE tools
Pick your need: from checking a diagnosis to 3CL simulation, all the way to disputing it.
Most popular
DPE Verification
Check your diagnostic's reliability and automatically detect anomalies.
Renovation Works
Calculate your MaPrimeRénov' 2026, CEE and Éco-PTZ aids and label gain.
DPE Simulation
Estimate your home's energy label with the official 3CL-2021 method.
Analyze
Understand and validate an existing DPE
DPE Verification
3/moCheck your diagnostic's reliability and automatically detect anomalies.
OpenDPE Visit Checklist
3/moGather the right documents before the assessor’s visit and avoid penalising default values.
OpenDPE Summer Comfort
FreeTest your home’s summer comfort indicator (annex 9): solar protections, roof, inertia, dual-aspect.
OpenInteractive DPE Map
FreeExplore diagnostics on a map and spot the thermal sieves in your neighborhood.
OpenFind Property by DPE
Free trialFind a listing's exact address using the ADEME database.
OpenSimulate
Project your energy label
Act & add value
Fund your works and negotiate the price
How it works
Enter your DPE number
Type your DPE number, or fill in your home’s characteristics.
We analyze with the 3CL method
Our engine applies the official 3CL-2021 calculation method and cross-checks public ADEME data.
Get your detailed result
Label, consumption breakdown, detected anomalies, estimated discount and recommended works — instantly.
Why OneDpe
Official 3CL method
Our simulations apply 3CL-2021, the DPE’s regulatory calculation framework.
Anomaly & fraud detection
Verification compares your DPE to similar properties and flags technical inconsistencies.
Public ADEME data
Our tools rely on the open DPE database published by ADEME.
Freemium & private
Start for free; advanced usage depends on your plan (Free, Premium, Pro). You stay in control of your data.
Frequently asked questions
You can start for free, with no account needed to try the tools. OneDpe runs on a freemium model: the basics are free, while advanced usage depends on your plan (Free, Premium, Pro). Creating an account unlocks higher limits and saves your analyses.
Ready to analyze your DPE?
Run your first check for free in a couple of minutes.
Understand, verify and improve your DPE
What you need to know to read, check and add value to an energy diagnosis.
The DPE (Energy Performance Diagnosis) summarizes a home’s energy use and greenhouse-gas emissions on a scale from A to G. Since 1 January 2026, the electricity conversion coefficient has dropped from 2.3 to 1.9, lowering the primary-energy consumption of electrically heated homes — which can shift some labels. Our My DPE 2026 tool computes that impact for your home.
A DPE can also be wrong. Mis-entered surface, insulation or heating data change the result. Use DPE verification to check a diagnosis against similar properties, DPE simulation to recompute the label with the official 3CL method, and the discount calculator to estimate the resale impact of an energy label. OneDpe tools are free to start (free tier, then Premium and Pro plans) and rely on public ADEME data.