DPE in Rennes: find a home and the city's figures
58,317 homes with a DPE in Rennes since July 2021, 6.9% rated F or G. Find a property from its DPE and see what the city's diagnostics say.
ADEME data as of 25 August 2026 — updated quarterly
Find a property from its DPE
Enter the consumption or rating shown in a listing in Rennes: the tool searches matching DPEs in the ADEME database.
Key facts
- 0.3% of homes with a DPE in Rennes report air conditioning, against 9.2% in mainland France.
- 19% of homes with a DPE in Rennes are on district heating (4.1% in mainland France).
- 31% of homes with a DPE in Rennes have shared (collective) heating (15% in mainland France).
- 20% of homes with a DPE in Rennes were built before 1948, against 32% in mainland France.
Energy and climate ratings
Among 58,317 valid DPEs of homes (excluding generated DPEs) in Rennes, rating C is the most common; 48% reach ratings A to C.
If the homes with a DPE in Rennes had the same mix of building age and type (house, flat) as mainland France, the F+G share would be 9.9% (+3.0 pts versus the observed figure).
Small homes are the most often poorly rated in Rennes: 10% of assessed homes under 25 m² are rated F or G, against 4.9% for those of 70-99 m².
For 23% of homes with a DPE in Rennes whose published class is reproduced, the climate rating (greenhouse-gas emissions) sets the DPE class: the final rating is the worse of the two (18% in mainland France).
13% of homes with a DPE in Rennes whose published class is reproduced would change rating with 5 kWh/m²/year of consumption, or 1 kg CO₂/m²/year of emissions, more or less: they sit on a class boundary (7,770 homes; 12% in mainland France). For them, a small measurement gap or a minor work can move the letter.
| Rating | Share | DPEs | Mainland France |
|---|---|---|---|
| A | 1.6% | 961 | 5.2% |
| B | 6.5% | 3,771 | 5.6% |
| C | 40% | 23,113 | 31% |
| D | 31% | 17,945 | 30% |
| E | 15% | 8,516 | 17% |
| F | 4.8% | 2,787 | 7.2% |
| G | 2.1% | 1,224 | 4.4% |
| Rating | Share | DPEs | Mainland France |
|---|---|---|---|
| A | 14% | 8,277 | 21% |
| B | 23% | 13,525 | 25% |
| C | 35% | 20,402 | 24% |
| D | 17% | 9,753 | 15% |
| E | 7.7% | 4,503 | 8.8% |
| F | 2.7% | 1,566 | 4.4% |
| G | 0.5% | 291 | 1.7% |
By type of home
| Indicator | Rennes | Ille-et-Vilaine | Mainland France |
|---|---|---|---|
| All homes | 6.9% | 7.6% | 12% |
| Houses | 16% | 11% | 15% |
| Flats | 6.1% | 5.0% | 9.3% |
| Comparable structure | 9.9% | 9.7% | 12% |
Share of F and G by construction period
| Indicator | Rennes | Ille-et-Vilaine | Mainland France |
|---|---|---|---|
| Before 1948 | 18% | 18% | 21% |
| 1948-1974 | 9.7% | 16% | 17% |
| 1975-1988 | 1.2% | 2.8% | 4.6% |
| 1989-2000 | 0.1% | 0.1% | 0.9% |
| 2001-2012 | < 0.1% | < 0.1% | 0.2% |
| After 2012 | < 0.1% | < 0.1% | < 0.1% |
Share of F and G by floor area
| Indicator | Rennes | Ille-et-Vilaine | Mainland France |
|---|---|---|---|
| Under 25 m² | 10% | 10% | 16% |
| 25-39 m² | 9.6% | 9.7% | 14% |
| 40-69 m² | 5.1% | 6.3% | 10% |
| 70-99 m² | 4.9% | 8.5% | 11% |
| 100 m² and over | 7.2% | 7.0% | 12% |
Share of F and G by period and type of home
| Period | Houses | Flats |
|---|---|---|
| Before 1948 | 25% (1,671) | 17% (10,148) |
| 1948-1974 | 21% (1,574) | 8.6% (16,665) |
| 1975-1988 | 1.0% (599) | 1.2% (5,346) |
| 1989-2000 | 0.3% (318) | 0.1% (6,960) |
| 2001-2012 | 0% (191) | < 0.1% (4,417) |
| After 2012 | 0.2% (410) | < 0.1% (10,018) |
DPEs generated from the building’s DPE
30% of valid DPEs (25,334) — against 24% in the département and 29% in mainland France — were produced from the building's DPE: their rating was not measured for the flat itself. They are shown separately: their ratings are not mixed into the figures above.
| Rating | Share | DPEs | Mainland France |
|---|---|---|---|
| A | 2.0% | 501 | 4.0% |
| B | 18% | 4,515 | 8.6% |
| C | 61% | 15,373 | 51% |
| D | 15% | 3,759 | 25% |
| E | 4.3% | 1,095 | 8.6% |
| F | 0.3% | 84 | 1.8% |
| G | < 0.1% | 7 | 0.5% |
G, F and E ratings: the decent-housing timetable
1,224 homes with a DPE (excluding generated DPEs) in Rennes are rated G, i.e. 2.1% of homes with a DPE (2.6% in the département, 4.4% in mainland France). Since 1 January 2025, a G-rated home no longer meets the energy performance level of decent housing (Law 89-462, s. 6).
2,787 homes with a DPE (excluding generated DPEs) in Rennes are rated F, i.e. 4.8% of homes with a DPE (5.0% in the département, 7.2% in mainland France). From 1 January 2028, rating F will no longer meet the energy performance level of decent housing (Law 89-462, s. 6).
8,516 homes with a DPE (excluding generated DPEs) in Rennes are rated E, i.e. 15% of homes with a DPE (12% in the département, 17% in mainland France). From 1 January 2034, rating E will no longer meet the energy performance level of decent housing (Law 89-462, s. 6).
On 1 January 2027, the electricity primary-energy conversion factor drops from 1.9 to 1.7 (order of 19 August 2026). Among the 3,990 F- or G-rated homes with a DPE (excluding generated DPEs) in Rennes whose DPE is still valid on that date, whose published class is reproduced and whose scale could be read, 23% could obtain a certificate of a new rating, at least one class better, downloadable from ADEME's DPE-Audit Observatory. The original DPE remains valid until it expires.
By postcode in Rennes
By postcode, the share of F- or G-rated homes with a DPE in Rennes ranges from 5.5% (35200) to 7.4% (35000). Homes built before 1948 make up 25% of assessed homes with a known period in 35000, against 3.6% in 35200.
Profile of the most contrasting postcodes and of the largest one (postcodes with at least 2,916 DPEs):
35000: 42,836 DPEs, 94% flats, 25% built before 1948 (among DPEs with a known period), 7.4% rated F or G, 42% heated with natural gas.
35200: 6,796 DPEs, 86% flats, 3.6% built before 1948 (among DPEs with a known period), 5.5% rated F or G, 46% heated by district heating.
| Postcode | DPEs (excl. generated) | F+G share | Flats | Before 1948 | Main energy |
|---|---|---|---|---|---|
| 35000 | 42,836 | 7.4% | 94% | 25% | Natural gas (42%) |
| 35200 | 6,796 | 5.5% | 86% | 3.6% | District heating (46%) |
| 35700 | 8,685 | 5.5% | 87% | 12% | Natural gas (56%) |
Heating and hot water
Natural gas comes first: 43% of homes with a DPE in Rennes rely on it for heating, and 31% have shared heating.
By heating energy, the share of F- or G-rated homes in Rennes ranges from 0% for homes heated with LPG, propane or butane to 73% for those heated with heating oil; it is 8.7% with electricity.
In the 2022 census, INSEE counts 28% of main residences mainly heated by electricity in Rennes; among homes with a DPE, the share is 37%.
Of the 10,815 homes with a DPE in Rennes heated by a district network, 79% declare their network's identifier. The main ones: “RÉSEAU DE RENNES NORD & EST” (3507C), 37% of connected homes (0.192 kg CO₂/kWh direct, 0.219 life-cycle); “RENNES SUD” (3506C), 37% of connected homes (0.086 kg CO₂/kWh direct, 0.115 life-cycle); “SARAH BERNHARDT” (3504C), 1.7% of connected homes (0.109 kg CO₂/kWh direct, 0.143 life-cycle). CO₂ contents set by the French order of 30 March 2026, applicable since 25 May 2026: an older DPE may have used other values.
| Indicator | Share | Mainland France |
|---|---|---|
| Natural gas | 43% | 36% |
| Electricity | 37% | 50% |
| District heating | 19% | 4.1% |
| Heating oil | 0.5% | 5.3% |
| Wood | 0.4% | 4.0% |
| LPG, propane or butane | 0.1% | 0.8% |
| Other energy | < 0.1% | < 0.1% |
| Indicator | Share | Mainland France |
|---|---|---|
| Individual heating | 69% | 84% |
| Shared (collective) heating | 29% | 14% |
| Multi-building collective | 1.9% | 0.9% |
| Hybrid collective-individual | 0.1% | 0.4% |
| Indicator | Share | Mainland France |
|---|---|---|
| Natural gas | 43% | 34% |
| Electricity | 40% | 59% |
| District heating | 17% | 3.0% |
| Heating oil | 0.3% | 3.2% |
| LPG, propane or butane | 0.1% | 0.8% |
| Wood | < 0.1% | 0.3% |
| Indicator | Share | Mainland France |
|---|---|---|
| Direct electric heating (convectors, radiators, panels) | 36% | 41% |
| Other gas boiler or heater | 25% | 17% |
| Gas condensing boiler | 19% | 20% |
| District heating | 18% | 4.1% |
| Oil boiler | 0.6% | 6.0% |
| Air-to-water heat pump | 0.5% | 2.3% |
| Wood stove, insert or boiler | 0.3% | 4.7% |
| Air-to-air heat pump | 0.2% | 4.2% |
Share of F and G by heating energy
| Indicator | Rennes | Ille-et-Vilaine | Mainland France |
|---|---|---|---|
| Electricity | 8.7% | 6.8% | 9.1% |
| Natural gas | 6.6% | 4.6% | 9.5% |
| Heating oil | 73% | 46% | 50% |
| Wood | 4.8% | 11% | 17% |
| District heating | 2.3% | 2.2% | 4.6% |
| LPG, propane or butane | 0% | 11% | 16% |
Declared district heating networks and CO₂ content
| Network | Share of connected homes | Direct CO₂ | Life-cycle CO₂ |
|---|---|---|---|
| RÉSEAU DE RENNES NORD & EST (3507C) | 37% | 0.192 | 0.219 |
| RENNES SUD (3506C) | 37% | 0.086 | 0.115 |
| SARAH BERNHARDT (3504C) | 1.7% | 0.109 | 0.143 |
| CAMPUS SCIENTIFIQUE DE BEAULIEU (3505C) | 1.2% | 0.204 | 0.237 |
| Réseau de Rennes Est (ZAC Baud -Chardonnet) (3513C) | 0.8% | n/a | n/a |
| REVERTEC (3510C) | 0.5% | 0.049 | 0.059 |
| RÉSEAU DE VEZIN LE COQUET (3512C) | 0.5% | 0.058 | 0.086 |
Solar panels reported: 0.2% of homes with a DPE.
Insulation, ventilation and thermal mass
According to DPEs in Rennes, insulation is rated poor for 55% of walls, 8.9% of loft roofs, 18% of windows and doors among the homes concerned.
| Indicator | Rennes | Ille-et-Vilaine | Mainland France |
|---|---|---|---|
| Building envelope (overall) | 44% | 32% | 46% |
| Windows and doors | 18% | 13% | 17% |
| Walls | 55% | 40% | 53% |
| Ground floor | 17% | 25% | 32% |
| Roof (loft) | 8.9% | 15% | 19% |
| Indicator | Share | Mainland France |
|---|---|---|
| Single-flow MVHR (self-regulating) | 38% | 33% |
| Natural ventilation | 31% | 38% |
| Single-flow humidity-controlled ventilation | 28% | 24% |
| Other ventilation | 2.0% | 3.0% |
| Double-flow ventilation (heat recovery) | 0.4% | 0.9% |
| Hybrid ventilation | 0.3% | 0.3% |
| Indicator | Share | Mainland France |
|---|---|---|
| Very heavy | 18% | 8.3% |
| Heavy | 34% | 24% |
| Medium | 22% | 33% |
| Light | 26% | 34% |
Summer comfort and heat
Over the 1991-2020 normal, Rennes averages 0.8 days a year above 35 °C and 0.5 nights above 20 °C; projections for 2050 point to 4.1 and 4.7.
The DPE includes a "summer comfort" section. In Rennes, 83% of homes with a DPE fill it in; of these, 35% are rated insufficient. This rate depends on who fills in the section, so it is not compared with other cities.
| Indicator | Share | Mainland France |
|---|---|---|
| Insufficient | 35% | — |
| Average | 44% | — |
| Good | 20% | — |
Air conditioning reported: 0.3% of homes with a DPE (9.2% in mainland France).
| External solar shading | 62% | of 48,585 DPEs |
|---|---|---|
| Insulated roof | 32% | of 48,465 DPEs |
| Heavy thermal mass | 49% | of 48,345 DPEs |
| Dual-aspect home | 55% | of 48,585 DPEs |
| Ceiling fan | 3.7% | of 48,585 DPEs |
Estimated consumption and cost
The median cost estimated by the DPE in Rennes is €785 a year for a flat (184 kWh of primary energy per m²) and €1,855 for a house (206 kWh/m²). Per unit of floor area, the median cost of a flat is €18 per m² a year (€17 in the département, €19 in mainland France). This cost is conventional: it assumes standard use and the energy prices in force when each DPE was issued, not a household's actual bill.
| Indicator | Rennes | Ille-et-Vilaine | Mainland France |
|---|---|---|---|
| Primary energy, flat (kWh/m²/yr) | 184 | 163 | 191 |
| Primary energy, house (kWh/m²/yr) | 206 | 173 | 193 |
| Annual cost, flat | €785 | €795 | €915 |
| Annual cost, house | €1,855 | €1,525 | €1,685 |
| Emissions, flat (kg CO₂/m²/yr) | 15 | 13 | 13 |
| Emissions, house (kg CO₂/m²/yr) | 32 | 9 | 12 |
Works proposed by DPEs
28% of DPEs of F- or G-rated homes in Rennes include a first costed package of works. Its median cost ranges from €5,750 (low estimate) to €8,250 (high estimate). These are the ranges entered by assessors, not quotes.
Prices and green value
Median price in Rennes over 2021-2025 sales: €3,700 per m² for a flat (15,169 sales), €4,863 for a house (2,334 sales) — DVF statistics (Etalab).
In our "DPE discount city by city" study (house sales matched to their DPE), F- or G-rated houses in Rennes sold for 11% more per m² than D-rated houses: a raw comparison, in which location and age weigh more than the rating.
Estimated advertised rent in Rennes, charges included, all DPE ratings combined: €14.87 per m² per month for a flat (prediction interval €11.63 to €19.01), €15.28 per m² per month for a house (2025 rent map).
Co-ownerships and collective DPE
The national register of co-ownerships lists 3,930 co-ownerships in Rennes (Q3 2025 file, all construction periods), with 99,756 residential units in total: 29 have more than 200 units used as homes, offices or shops, 480 between 51 and 200, and 3,421 with 50 units or fewer. Of those with a known period, 28% were built before 1949 and 13% after 2010.
The collective DPE covers multi-dwelling residential buildings whose building permit application was filed before 1 January 2013, on a timetable set by the number of units (rule and references in the method). ADEME's database holds 2,363 valid building-level DPEs in Rennes, single-owner buildings included; one building may have several.
213 co-ownerships in Rennes are flagged in the register as having received an Anah grant for owners' associations, and 92 are in a priority urban-policy neighbourhood (QPV).
| Over 200 units | 29 |
|---|---|
| 51-200 units | 480 |
| 50 units or fewer | 3,421 |
The homes with a DPE
INSEE counts 135,694 homes in Rennes (2022 census), including 120,347 main residences; 64% of them are occupied by tenants, and 20% of main residences are social housing let unfurnished; 6.6% of homes are vacant.
| Indicator | Share | Mainland France |
|---|---|---|
| Houses | 8.2% | 42% |
| Flats | 92% | 58% |
| Indicator | Share | Mainland France |
|---|---|---|
| Before 1948 | 20% | 32% |
| 1948-1974 | 31% | 25% |
| 1975-1988 | 10% | 12% |
| 1989-2000 | 12% | 8.3% |
| 2001-2012 | 7.9% | 10% |
| After 2012 | 18% | 13% |
DPEs quarter by quarter
94,308 DPEs of homes have been issued in Rennes since July 2021. The F+G share among each quarter's DPEs went from 12% (2021, Q3) to 5.0% (2026, Q2) — a shift that also reflects which homes get assessed, and changes to the calculation rules.
| Quarter | DPEs issued | F+G share |
|---|---|---|
| 2021 Q3 | 2,268 | 12% |
| 2021 Q4 | 3,065 | 9.9% |
| 2022 Q1 | 3,488 | 8.2% |
| 2022 Q2 | 3,827 | 8.9% |
| 2022 Q3 | 3,551 | 8.5% |
| 2022 Q4 | 3,654 | 8.6% |
| 2023 Q1 | 5,159 | 5.8% |
| 2023 Q2 | 5,235 | 6.3% |
| 2023 Q3 | 6,271 | 4.1% |
| 2023 Q4 | 5,731 | 4.1% |
| 2024 Q1 | 5,418 | 5.4% |
| 2024 Q2 | 8,575 | 4.0% |
| 2024 Q3 | 5,024 | 5.5% |
| 2024 Q4 | 4,962 | 4.8% |
| 2025 Q1 | 5,370 | 5.8% |
| 2025 Q2 | 4,719 | 5.8% |
| 2025 Q3 | 3,597 | 6.6% |
| 2025 Q4 | 2,906 | 8.1% |
| 2026 Q1 | 6,075 | 4.1% |
| 2026 Q2 | 3,865 | 5.0% |
| 2026 Q3 (in progress) | 1,548 | 7.6% |
Frequently asked questions — Rennes
How many energy-inefficient homes are there in Rennes?
Is district heating common in Rennes?
Which postcode of Rennes has the highest share of F- or G-rated homes?
Why are some DPEs in Rennes generated from the building?
How are homes in Rennes heated?
Go further with your DPE
Comparable cities
Cities chosen for their similar size, climate, building stock or département.
Among its comparable cities (Brest, Montpellier, Cannes, Tours, Dijon and Toulouse), Rennes has the highest share of district-heated homes (19%, against 17% in Tours).
| City | F+G share | Built before 1948 | Electric heating | District heating | Median annual cost, flat | Median price per m², flat | Advertised rent, flat (€/m²/month) |
|---|---|---|---|---|---|---|---|
| Rennes | 6.9% | 20% | 37% | 19% | €785 | €3,700 | €14.87 |
| Brest | 5.6% | 16% | 44% | 10% | €985 | €2,039 | €12.18 |
| Montpellier | 2.7% | 19% | 65% | 5.1% | €675 | €3,333 | €15.49 |
| Cannes | 4.8% | 21% | 57% | 0.2% | €785 | €5,333 | €20.27 |
| Tours | 8.8% | 26% | 39% | 17% | €785 | €2,862 | €13.51 |
| Dijon | 11% | 31% | 41% | 13% | €895 | €2,685 | €13.34 |
| Toulouse | 4.9% | 20% | 55% | 4.7% | €745 | €3,293 | €13.98 |
Sources for this page
DPEs of existing homes published by ADEME (Open Licence 2.0), dump of 25 August 2026. Population: 58,317 homes with a DPE (excluding generated DPEs) since 1 July 2021, DPEs valid on 25 August 2026 and not replaced. These are homes with a DPE, not every home in the city.
INSEE codes used: 35238.
Share of DPEs with the same address, floor area and floor as another valid DPE: 33%.
Other sources: DVF statistics (Etalab), the housing ministry rent map, the national co-ownership register (Anah), INSEE census, Météo-France and DRIAS — references and licences in the detailed method below.
Download the data in Rennes (CSV, long format: one row per value) — Derived data published under the Open Licence 2.0 (Etalab): free reuse, including commercial, crediting "OneDpe based on ADEME" and the data vintage.