1OneDpe
FRVerify my DPE
ADEME data · 3CL method · Free to start

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.

1. Search

DPE number or address.

2. Analyze

3CL method + ADEME data.

3. Act

Anomalies, discount, works.

Free to start
No account to try
Official ADEME data
Official 3CL-2021 method

7 DPE tools

Pick your need: from checking a diagnosis to 3CL simulation, all the way to disputing it.

Analyze

Understand and validate an existing DPE

DPE Verification

Check your diagnostic's reliability and automatically detect anomalies.

Open

Interactive DPE Map

Explore diagnostics on a map and spot the thermal sieves in your neighborhood.

Open

Find Property by DPE

Find a listing's exact address using the ADEME database.

Open

Simulate

Project your energy label

DPE Simulation

Estimate your home's energy label with the official 3CL-2021 method.

Open

My DPE in 2026

See if your label changes with the new 1.9 electricity coefficient.

Open

Act & add value

Fund your works and negotiate the price

Renovation Works

Calculate your MaPrimeRénov' 2026, CEE and Éco-PTZ aids and label gain.

Open

DPE Decote Calculator

Estimate a property's price decote by its label (French Notaires 2024 study).

Open
See the full DPE toolkit

How it works

1

Enter your DPE number

Type your DPE number, or fill in your home’s characteristics.

2

We analyze with the 3CL method

Our engine applies the official 3CL-2021 calculation method and cross-checks public ADEME data.

3

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.

Verify my DPE Simulate with the 3CL method
Secure Free to start ADEME data

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Understand, verify and improve your DPE

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.