New DPE 2026: What Changes in Energy Performance Calculation

DPE Reform 2026: What's Changing

The Diagnostic de Performance Énergétique (DPE) - France's energy performance certificate - sees significant changes in 2026 affecting property owners, landlords, and buyers. For more on energy efficiency in France, explore our complete guides.

What is the DPE?

The DPE rates buildings from A (best) to G (worst) based on:

Energy consumption (kWh/m²/year)
Greenhouse gas emissions (kg CO₂/m²/year)

Key Changes in 2026

#### New Calculation Method

The 2026 reform adjusts:

Small apartment calculations (previously disadvantaged)
Heating system assessments
Insulation value weighting
Regional climate factors

#### Impact on Ratings

Many properties will see rating changes:

Small apartments: Often upgrade 1-2 classes
Electric heating: More favorable assessment
Older buildings: May see slight improvements

Rental Restrictions Timeline

Date	Restriction
January 1, 2025	G-rated cannot be newly rented
January 1, 2028	F-rated cannot be newly rented
January 1, 2034	E-rated cannot be newly rented

Note: Existing leases can continue, but no new leases allowed.

Who Needs a DPE?

#### Required For

Property sales
New rental agreements
New construction
Real estate listings

#### Validity

10 years (standard)
DPEs from before July 2021: Check if still valid

Getting a New DPE

#### Steps

Contact certified diagnostician
Schedule property assessment
Receive report within days
Display in listings

#### Cost

Small apartment: €100-150
House: €150-250
Large property: €250-400

Improving Your Rating

#### Quick Wins

Replace old boiler (can improve 1-2 classes)
Add roof/attic insulation
Install double glazing
Seal drafts

#### Significant Improvements

Wall insulation (internal or external)
Heat pump installation
Solar panels
Complete renovation package with MaPrimeRénov' 2026

Financial Support

Aid	Coverage
MaPrimeRénov'	Up to €10,000 (income-based)
CEE (Energy Certificates)	Variable discounts
Eco-PTZ	Interest-free loan up to €50,000
Local aids	Check regional programs

Impact on Property Value

Properties with poor DPE ratings face:

Lower sale prices (5-15% discount)
Longer time on market
Negotiation pressure
Rental restrictions

Properties with good ratings:

Premium pricing possible
Faster sales
Higher rents achievable

Frequently Asked Questions

**Can I challenge my DPE result?**

Yes, request a new assessment from a different diagnostician.

**Does the reform apply to existing DPEs?**

Only new DPEs will use the updated calculation.

**What if I can't afford improvements?**

Financial aids can cover 50-90% of costs for eligible households.

**Are there exemptions from rental bans?**

Yes, for historical buildings and certain technical impossibilities.

Sources

Property owners should plan energy improvements well ahead of rental restriction deadlines. Start with a DPE audit to identify priority actions.