Energy Performance Certificate
Penthouse E, 15 Portman Square, W1H 6LJ
Energy rating
Current: 39 E | Potential: 75 C
Environmental impact (CO₂)
Current: 30
| Potential: 69
| Field | Value |
|---|---|
| LMK KEY | 0952-1202-2806-9476-2804 |
| ADDRESS1 | Penthouse E |
| ADDRESS2 | 15 Portman Square |
| ADDRESS3 | — |
| POSTCODE | W1H 6LJ |
| BUILDING REFERENCE NUMBER | — |
| CURRENT ENERGY RATING | E |
| POTENTIAL ENERGY RATING | C |
| CURRENT ENERGY EFFICIENCY | 39 |
| POTENTIAL ENERGY EFFICIENCY | 75 |
| PROPERTY TYPE | Flat |
| BUILT FORM | End-Terrace |
| INSPECTION DATE | 2026-05-14 |
| LOCAL AUTHORITY | E09000033 |
| CONSTITUENCY | E14001172 |
| COUNTY | — |
| LODGEMENT DATE | 2026-05-15 |
| TRANSACTION TYPE | Rental |
| ENVIRONMENT IMPACT CURRENT | 30 |
| ENVIRONMENT IMPACT POTENTIAL | 69 |
| ENERGY CONSUMPTION CURRENT | 346 |
| ENERGY CONSUMPTION POTENTIAL | 129 |
| CO2 EMISSIONS CURRENT | 12 |
| CO2 EMISS CURR PER FLOOR AREA | 64 |
| CO2 EMISSIONS POTENTIAL | 4.6 |
| LIGHTING COST CURRENT | 89 |
| LIGHTING COST POTENTIAL | 89 |
| HEATING COST CURRENT | 2890 |
| HEATING COST POTENTIAL | 957 |
| HOT WATER COST CURRENT | 272 |
| HOT WATER COST POTENTIAL | 272 |
| TOTAL FLOOR AREA | 194 |
| ENERGY TARIFF | Unknown |
| MAINS GAS FLAG | N |
| FLOOR LEVEL | 3 |
| FLAT TOP STOREY | N |
| FLAT STOREY COUNT | 1 |
| MAIN HEATING CONTROLS | Flat rate charging, TRVs |
| MULTI GLAZE PROPORTION | 100 |
| GLAZED TYPE | — |
| GLAZED AREA | — |
| EXTENSION COUNT | 0 |
| NUMBER HABITABLE ROOMS | 5 |
| NUMBER HEATED ROOMS | 5 |
| LOW ENERGY LIGHTING | 100 |
| NUMBER OPEN FIREPLACES | 0 |
| HOTWATER DESCRIPTION | Community scheme |
| HOT WATER ENERGY EFF | Average |
| HOT WATER ENV EFF | Average |
| FLOOR DESCRIPTION | (another dwelling below) |
| FLOOR ENERGY EFF | N/A |
| FLOOR ENV EFF | N/A |
| WINDOWS DESCRIPTION | Fully double glazed |
| WINDOWS ENERGY EFF | Average |
| WINDOWS ENV EFF | Average |
| WALLS DESCRIPTION | Solid brick, as built, no insulation (assumed) |
| WALLS ENERGY EFF | Very Poor |
| WALLS ENV EFF | Very Poor |
| SECONDHEAT DESCRIPTION | None |
| SHEATING ENERGY EFF | N/A |
| SHEATING ENV EFF | N/A |
| ROOF DESCRIPTION | Flat, limited insulation |
| ROOF ENERGY EFF | Very Poor |
| ROOF ENV EFF | Very Poor |
| MAINHEAT DESCRIPTION | Community scheme |
| MAINHEAT ENERGY EFF | Average |
| MAINHEAT ENV EFF | Average |
| MAINHEATCONT DESCRIPTION | Flat rate charging, TRVs |
| MAINHEATC ENERGY EFF | Average |
| MAINHEATC ENV EFF | Average |
| LIGHTING DESCRIPTION | Excellent lighting efficiency |
| LIGHTING ENERGY EFF | Very Good |
| LIGHTING ENV EFF | Very Good |
| MAIN FUEL | mains gas (community) |
| WIND TURBINE COUNT | 0 |
| HEAT LOSS CORRIDOR | heated corridor |
| UNHEATED CORRIDOR LENGTH | — |
| FLOOR HEIGHT | 2.69 |
| PHOTO SUPPLY | 0 |
| SOLAR WATER HEATING FLAG | N |
| MECHANICAL VENTILATION | natural |
| ADDRESS | Penthouse E, 15 Portman Square |
| LOCAL AUTHORITY LABEL | Westminster |
| CONSTITUENCY LABEL | Cities of London and Westminster |
| POSTTOWN | LONDON |
| CONSTRUCTION AGE BAND | England and Wales: 1950-1966 |
| LODGEMENT DATETIME | 2026-05-15 16:58:15 |
| TENURE | unknown |
| FIXED LIGHTING OUTLETS COUNT | 69 |
| LOW ENERGY FIXED LIGHT COUNT | 69 |
| UPRN | 100022792286 |
| UPRN SOURCE | Energy Assessor |
| REPORT TYPE | 2 |
| Source file | certificates-2026.csv |
| COUNTRY | England |
| REGION | E12000007 |
| Address display | — |
| Nation | ew |