DPE in Boulogne-Billancourt: find a home and the city's figures
27,817 homes with a DPE in Boulogne-Billancourt since July 2021, 19% 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 Boulogne-Billancourt: the tool searches matching DPEs in the ADEME database.
Key facts
- 52% of homes with a DPE in Boulogne-Billancourt have shared (collective) heating (15% in mainland France).
- 19% of homes with a DPE in Boulogne-Billancourt are rated F or G, against 12% in mainland France.
- Natural gas heats 48% of homes with a DPE in Boulogne-Billancourt, against 36% in mainland France.
- 10% of homes with a DPE in Boulogne-Billancourt are on district heating (4.1% in mainland France).
Energy and climate ratings
Among 27,817 valid DPEs of homes (excluding generated DPEs) in Boulogne-Billancourt, rating D is the most common; 24% reach ratings A to C.
Small homes are the most often poorly rated in Boulogne-Billancourt: 31% of assessed homes under 25 m² are rated F or G, against 9.8% for those of 70-99 m².
For 15% of homes with a DPE in Boulogne-Billancourt 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).
12% of homes with a DPE in Boulogne-Billancourt 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 (3,193 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 | 0.2% | 58 | 5.2% |
| B | 2.7% | 748 | 5.6% |
| C | 21% | 5,965 | 31% |
| D | 29% | 8,128 | 30% |
| E | 27% | 7,636 | 17% |
| F | 12% | 3,303 | 7.2% |
| G | 7.1% | 1,979 | 4.4% |
| Rating | Share | DPEs | Mainland France |
|---|---|---|---|
| A | 8.6% | 2,393 | 21% |
| B | 20% | 5,425 | 25% |
| C | 22% | 6,245 | 24% |
| D | 20% | 5,625 | 15% |
| E | 18% | 4,994 | 8.8% |
| F | 8.4% | 2,346 | 4.4% |
| G | 2.8% | 789 | 1.7% |
By type of home
| Indicator | Boulogne-Billancourt | Hauts-de-Seine | Mainland France |
|---|---|---|---|
| All homes | 19% | 18% | 12% |
| Houses | 22% | 30% | 15% |
| Flats | 19% | 17% | 9.3% |
| Comparable structure | n/a | 19% | 12% |
Share of F and G by construction period
| Indicator | Boulogne-Billancourt | Hauts-de-Seine | Mainland France |
|---|---|---|---|
| Before 1948 | 31% | 34% | 21% |
| 1948-1974 | 21% | 22% | 17% |
| 1975-1988 | 6.8% | 5.9% | 4.6% |
| 1989-2000 | 1.1% | 0.9% | 0.9% |
| 2001-2012 | 0.1% | 0.2% | 0.2% |
| After 2012 | 0.2% | < 0.1% | < 0.1% |
Share of F and G by floor area
| Indicator | Boulogne-Billancourt | Hauts-de-Seine | Mainland France |
|---|---|---|---|
| Under 25 m² | 31% | 27% | 16% |
| 25-39 m² | 25% | 25% | 14% |
| 40-69 m² | 15% | 15% | 10% |
| 70-99 m² | 9.8% | 11% | 11% |
| 100 m² and over | 10% | 16% | 12% |
Share of F and G by period and type of home
| Period | Houses | Flats |
|---|---|---|
| Before 1948 | 33% (339) | 31% (9,530) |
| 1948-1974 | 16% (67) | 21% (9,714) |
| 1975-1988 | n/a | 6.8% (2,143) |
| 1989-2000 | n/a | 1.1% (2,679) |
| 2001-2012 | 0% (62) | 0.1% (1,580) |
| After 2012 | n/a | 0.2% (1,611) |
DPEs generated from the building’s DPE
31% of valid DPEs (12,487) — against 46% 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 | 1.8% | 222 | 4.0% |
| B | 2.8% | 345 | 8.6% |
| C | 36% | 4,476 | 51% |
| D | 31% | 3,885 | 25% |
| E | 22% | 2,802 | 8.6% |
| F | 5.0% | 621 | 1.8% |
| G | 1.1% | 136 | 0.5% |
G, F and E ratings: the decent-housing timetable
1,979 homes with a DPE (excluding generated DPEs) in Boulogne-Billancourt are rated G, i.e. 7.1% of homes with a DPE (7.2% 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).
3,303 homes with a DPE (excluding generated DPEs) in Boulogne-Billancourt are rated F, i.e. 12% of homes with a DPE (10% 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).
7,636 homes with a DPE (excluding generated DPEs) in Boulogne-Billancourt are rated E, i.e. 27% of homes with a DPE (22% 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 5,249 F- or G-rated homes with a DPE (excluding generated DPEs) in Boulogne-Billancourt whose DPE is still valid on that date, whose published class is reproduced and whose scale could be read, 18% 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.
Heating and hot water
Natural gas comes first: 48% of homes with a DPE in Boulogne-Billancourt rely on it for heating, and 52% have shared heating.
By heating energy, the share of F- or G-rated homes in Boulogne-Billancourt ranges from 5.1% for homes heated by district heating to 60% for those heated with heating oil; it is 17% with electricity.
In the 2022 census, INSEE counts 34% of main residences mainly heated by electricity in Boulogne-Billancourt; among homes with a DPE, the share is 38%.
Of the 2,883 homes with a DPE in Boulogne-Billancourt heated by a district network, 80% declare their network's identifier. The main ones: “RÉSEAU CHAUD SEGUIN RIVES DE SEINE” (9219C), 53% of connected homes (0.122 kg CO₂/kWh direct, 0.130 life-cycle); “PARIS ET COMMUNES LIMITROPHES” (7501C), 9.1% of connected homes (0.149 kg CO₂/kWh direct, 0.171 life-cycle); “RÉSEAU DE MEUDON” (9201C), 8.7% of connected homes (0.250 kg CO₂/kWh direct, 0.284 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 | 48% | 36% |
| Electricity | 38% | 50% |
| District heating | 10% | 4.1% |
| Heating oil | 3.3% | 5.3% |
| LPG, propane or butane | 0.2% | 0.8% |
| Wood | < 0.1% | 4.0% |
| Indicator | Share | Mainland France |
|---|---|---|
| Shared (collective) heating | 49% | 14% |
| Individual heating | 47% | 84% |
| Multi-building collective | 3.0% | 0.9% |
| Hybrid collective-individual | 0.9% | 0.4% |
| Indicator | Share | Mainland France |
|---|---|---|
| Electricity | 50% | 59% |
| Natural gas | 38% | 34% |
| District heating | 9.5% | 3.0% |
| Heating oil | 2.2% | 3.2% |
| LPG, propane or butane | 0.1% | 0.8% |
| Indicator | Share | Mainland France |
|---|---|---|
| Direct electric heating (convectors, radiators, panels) | 36% | 41% |
| Other gas boiler or heater | 32% | 17% |
| Gas condensing boiler | 18% | 20% |
| District heating | 10% | 4.1% |
| Oil boiler | 3.4% | 6.0% |
| Air-to-air heat pump | 0.6% | 4.2% |
| Air-to-water heat pump | 0.2% | 2.3% |
| Water or ground-source heat pump | 0.1% | 0.2% |
Share of F and G by heating energy
| Indicator | Boulogne-Billancourt | Hauts-de-Seine | Mainland France |
|---|---|---|---|
| Electricity | 17% | 16% | 9.1% |
| Natural gas | 21% | 19% | 9.5% |
| Heating oil | 60% | 63% | 50% |
| District heating | 5.1% | 4.2% | 4.6% |
Declared district heating networks and CO₂ content
| Network | Share of connected homes | Direct CO₂ | Life-cycle CO₂ |
|---|---|---|---|
| RÉSEAU CHAUD SEGUIN RIVES DE SEINE (9219C) | 53% | 0.122 | 0.130 |
| PARIS ET COMMUNES LIMITROPHES (7501C) | 9.1% | 0.149 | 0.171 |
| RÉSEAU DE MEUDON (9201C) | 8.7% | 0.250 | 0.284 |
| RÉSEAU DU FORT D'ISSY (9234C) | 2.1% | 0.169 | 0.148 |
Solar panels reported: < 0.1% of homes with a DPE.
Insulation, ventilation and thermal mass
According to DPEs in Boulogne-Billancourt, insulation is rated poor for 75% of walls, 4.9% of loft roofs, 26% of windows and doors among the homes concerned.
| Indicator | Boulogne-Billancourt | Hauts-de-Seine | Mainland France |
|---|---|---|---|
| Building envelope (overall) | 69% | 60% | 46% |
| Windows and doors | 26% | 19% | 17% |
| Walls | 75% | 64% | 53% |
| Ground floor | 14% | 17% | 32% |
| Roof (loft) | 4.9% | 7.0% | 19% |
| Indicator | Share | Mainland France |
|---|---|---|
| Natural ventilation | 58% | 38% |
| Single-flow MVHR (self-regulating) | 21% | 33% |
| Single-flow humidity-controlled ventilation | 17% | 24% |
| Other ventilation | 3.8% | 3.0% |
| Double-flow ventilation (heat recovery) | 0.5% | 0.9% |
| Hybrid ventilation | 0.3% | 0.3% |
| Indicator | Share | Mainland France |
|---|---|---|
| Very heavy | 19% | 8.3% |
| Heavy | 28% | 24% |
| Medium | 24% | 33% |
| Light | 29% | 34% |
Summer comfort and heat
Over the 1991-2020 normal, Boulogne-Billancourt averages 2.9 days a year above 35 °C and 4.5 nights above 20 °C; projections for 2050 point to 7.8 and 15.8.
The DPE includes a "summer comfort" section. In Boulogne-Billancourt, 93% of homes with a DPE fill it in; of these, 40% 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 | 40% | — |
| Average | 46% | — |
| Good | 15% | — |
Air conditioning reported: 2.1% of homes with a DPE (9.2% in mainland France).
| External solar shading | 50% | of 25,946 DPEs |
|---|---|---|
| Insulated roof | 20% | of 24,828 DPEs |
| Heavy thermal mass | 43% | of 25,675 DPEs |
| Dual-aspect home | 47% | of 25,946 DPEs |
| Ceiling fan | 3.7% | of 25,946 DPEs |
Estimated consumption and cost
The median cost estimated by the DPE in Boulogne-Billancourt is €985 a year for a flat (242 kWh of primary energy per m²) and €2,515 for a house (225 kWh/m²). Per unit of floor area, the median cost of a flat is €22 per m² a year (€21 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 | Boulogne-Billancourt | Hauts-de-Seine | Mainland France |
|---|---|---|---|
| Primary energy, flat (kWh/m²/yr) | 242 | 217 | 191 |
| Primary energy, house (kWh/m²/yr) | 225 | 253 | 193 |
| Annual cost, flat | €985 | €935 | €915 |
| Annual cost, house | €2,515 | €2,425 | €1,685 |
| Emissions, flat (kg CO₂/m²/yr) | 29 | 21 | 13 |
| Emissions, house (kg CO₂/m²/yr) | 30 | 44 | 12 |
Works proposed by DPEs
20% of DPEs of F- or G-rated homes in Boulogne-Billancourt include a first costed package of works. Its median cost ranges from €3,750 (low estimate) to €6,250 (high estimate). These are the ranges entered by assessors, not quotes.
Prices and green value
Median price in Boulogne-Billancourt over 2021-2025 sales: €8,837 per m² for a flat (8,365 sales), €13,145 for a house (177 sales) — DVF statistics (Etalab).
Estimated advertised rent in Boulogne-Billancourt, charges included, all DPE ratings combined: €29.73 per m² per month for a flat (prediction interval €23.95 to €36.91), €27.49 per m² per month for a house (2025 rent map).
Co-ownerships and collective DPE
The national register of co-ownerships lists 2,148 co-ownerships in Boulogne-Billancourt (Q3 2025 file, all construction periods), with 66,363 residential units in total: 34 have more than 200 units used as homes, offices or shops, 254 between 51 and 200, and 1,860 with 50 units or fewer. Of those with a known period, 35% were built before 1949 and 4.6% 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 901 valid building-level DPEs in Boulogne-Billancourt, single-owner buildings included; one building may have several.
63 co-ownerships in Boulogne-Billancourt are flagged in the register as having received an Anah grant for owners' associations, and 0 are in a priority urban-policy neighbourhood (QPV).
| Over 200 units | 34 |
|---|---|
| 51-200 units | 254 |
| 50 units or fewer | 1,860 |
The homes with a DPE
INSEE counts 68,116 homes in Boulogne-Billancourt (2022 census), including 59,649 main residences; 53% of them are occupied by tenants, and 14% of main residences are social housing let unfurnished; 6.7% of homes are vacant.
| Indicator | Share | Mainland France |
|---|---|---|
| Houses | 2.0% | 42% |
| Flats | 98% | 58% |
| Indicator | Share | Mainland France |
|---|---|---|
| Before 1948 | 35% | 32% |
| 1948-1974 | 35% | 25% |
| 1975-1988 | 7.7% | 12% |
| 1989-2000 | 9.8% | 8.3% |
| 2001-2012 | 5.9% | 10% |
| After 2012 | 5.9% | 13% |
DPEs quarter by quarter
46,563 DPEs of homes have been issued in Boulogne-Billancourt since July 2021. The F+G share among each quarter's DPEs went from 32% (2021, Q3) to 15% (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 | 568 | 32% |
| 2021 Q4 | 945 | 35% |
| 2022 Q1 | 1,254 | 25% |
| 2022 Q2 | 2,501 | 15% |
| 2022 Q3 | 2,489 | 9.5% |
| 2022 Q4 | 2,901 | 25% |
| 2023 Q1 | 2,382 | 22% |
| 2023 Q2 | 2,161 | 21% |
| 2023 Q3 | 2,564 | 16% |
| 2023 Q4 | 2,734 | 18% |
| 2024 Q1 | 3,038 | 13% |
| 2024 Q2 | 2,237 | 15% |
| 2024 Q3 | 2,283 | 18% |
| 2024 Q4 | 3,190 | 13% |
| 2025 Q1 | 3,941 | 10% |
| 2025 Q2 | 2,060 | 23% |
| 2025 Q3 | 2,664 | 16% |
| 2025 Q4 | 1,816 | 20% |
| 2026 Q1 | 2,201 | 16% |
| 2026 Q2 | 1,924 | 15% |
| 2026 Q3 (in progress) | 710 | 16% |
Frequently asked questions — Boulogne-Billancourt
How many energy-inefficient homes are there in Boulogne-Billancourt?
Why are some DPEs in Boulogne-Billancourt generated from the building?
Is district heating common in Boulogne-Billancourt?
How are homes in Boulogne-Billancourt heated?
What do DPEs in Boulogne-Billancourt say about summer comfort?
Go further with your DPE
Comparable cities
Cities chosen for their similar size, climate, building stock or département.
Among its comparable cities (Colombes, Saint-Denis, Montreuil, Versailles, Vitry-sur-Seine, Rouen and Paris), Boulogne-Billancourt has the highest advertised rent for a flat (€29.73, against €24.31 in Versailles).
| 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) |
|---|---|---|---|---|---|---|---|
| Boulogne-Billancourt | 19% | 35% | 38% | 10% | €985 | €8,837 | €29.73 |
| Colombes | 27% | 45% | 29% | 3.2% | €945 | €5,337 | €23.54 |
| Saint-Denis | 15% | 40% | 54% | 14% | €875 | €4,155 | €20.97 |
| Montreuil | 21% | 40% | 45% | 2.6% | €975 | €6,383 | €22.86 |
| Versailles | 21% | 52% | 43% | 3.5% | €1,095 | €6,884 | €24.31 |
| Vitry-sur-Seine | 22% | 34% | 38% | 16% | €975 | €4,103 | €20.80 |
| Rouen | 14% | 44% | 56% | 4.3% | €875 | €2,818 | €13.28 |
| Paris | 24% | 72% | 54% | 9.9% | €1,025 | €10,238 | n/a |
Sources for this page
DPEs of existing homes published by ADEME (Open Licence 2.0), dump of 25 August 2026. Population: 27,817 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: 92012.
Share of DPEs with the same address, floor area and floor as another valid DPE: 30%.
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 Boulogne-Billancourt (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.