Energy Performance Certificate
Flat 11, 15 Portman Square, W1H 6LJ
Energy rating
Current: 57 D | Potential: 68 D
Environmental impact (CO₂)
Current: 50
| Potential: 65
| Field | Value |
|---|---|
| LMK KEY | 0642-3053-8208-5675-4200 |
| ADDRESS1 | Flat 11 |
| ADDRESS2 | 15 Portman Square |
| ADDRESS3 | — |
| POSTCODE | W1H 6LJ |
| BUILDING REFERENCE NUMBER | — |
| CURRENT ENERGY RATING | D |
| POTENTIAL ENERGY RATING | D |
| CURRENT ENERGY EFFICIENCY | 57 |
| POTENTIAL ENERGY EFFICIENCY | 68 |
| PROPERTY TYPE | Flat |
| BUILT FORM | Not Recorded |
| INSPECTION DATE | 2025-08-04 |
| LOCAL AUTHORITY | E09000033 |
| CONSTITUENCY | E14001172 |
| COUNTY | — |
| LODGEMENT DATE | 2025-08-07 |
| TRANSACTION TYPE | Marketed sale |
| ENVIRONMENT IMPACT CURRENT | 50 |
| ENVIRONMENT IMPACT POTENTIAL | 65 |
| ENERGY CONSUMPTION CURRENT | 297 |
| ENERGY CONSUMPTION POTENTIAL | 206 |
| CO2 EMISSIONS CURRENT | 3.7 |
| CO2 EMISS CURR PER FLOOR AREA | 55 |
| CO2 EMISSIONS POTENTIAL | 2.5 |
| LIGHTING COST CURRENT | 47 |
| LIGHTING COST POTENTIAL | 47 |
| HEATING COST CURRENT | 794 |
| HEATING COST POTENTIAL | 514 |
| HOT WATER COST CURRENT | 215 |
| HOT WATER COST POTENTIAL | 215 |
| TOTAL FLOOR AREA | 67 |
| ENERGY TARIFF | Unknown |
| MAINS GAS FLAG | Y |
| FLOOR LEVEL | 2 |
| FLAT TOP STOREY | N |
| FLAT STOREY COUNT | 1 |
| MAIN HEATING CONTROLS | Flat rate charging, no thermostatic control of room temperature |
| MULTI GLAZE PROPORTION | 0 |
| GLAZED TYPE | — |
| GLAZED AREA | — |
| EXTENSION COUNT | 0 |
| NUMBER HABITABLE ROOMS | 3 |
| NUMBER HEATED ROOMS | 3 |
| LOW ENERGY LIGHTING | 100 |
| NUMBER OPEN FIREPLACES | — |
| HOTWATER DESCRIPTION | Community scheme |
| HOT WATER ENERGY EFF | Average |
| HOT WATER ENV EFF | Average |
| FLOOR DESCRIPTION | (other premises below) |
| FLOOR ENERGY EFF | N/A |
| FLOOR ENV EFF | N/A |
| WINDOWS DESCRIPTION | Single glazed |
| WINDOWS ENERGY EFF | Very Poor |
| WINDOWS ENV EFF | Very Poor |
| WALLS DESCRIPTION | Solid brick, as built, no insulation (assumed) |
| WALLS ENERGY EFF | Poor |
| WALLS ENV EFF | Poor |
| SECONDHEAT DESCRIPTION | None |
| SHEATING ENERGY EFF | N/A |
| SHEATING ENV EFF | N/A |
| ROOF DESCRIPTION | (another dwelling above) |
| ROOF ENERGY EFF | N/A |
| ROOF ENV EFF | N/A |
| MAINHEAT DESCRIPTION | Community scheme |
| MAINHEAT ENERGY EFF | Average |
| MAINHEAT ENV EFF | Average |
| MAINHEATCONT DESCRIPTION | Flat rate charging, no thermostatic control of room temperature |
| MAINHEATC ENERGY EFF | Very Poor |
| MAINHEATC ENV EFF | Very Poor |
| LIGHTING DESCRIPTION | Good lighting efficiency |
| LIGHTING ENERGY EFF | Good |
| LIGHTING ENV EFF | Good |
| MAIN FUEL | mains gas (community) |
| WIND TURBINE COUNT | 0 |
| HEAT LOSS CORRIDOR | unheated corridor |
| UNHEATED CORRIDOR LENGTH | 13.1 |
| FLOOR HEIGHT | 2.64 |
| PHOTO SUPPLY | 0 |
| SOLAR WATER HEATING FLAG | N |
| MECHANICAL VENTILATION | natural |
| ADDRESS | Flat 11, 15 Portman Square |
| LOCAL AUTHORITY LABEL | Westminster |
| CONSTITUENCY LABEL | Cities of London and Westminster |
| POSTTOWN | LONDON |
| CONSTRUCTION AGE BAND | England and Wales: 1900-1929 |
| LODGEMENT DATETIME | 2025-08-07 10:53:04 |
| TENURE | owner-occupied |
| FIXED LIGHTING OUTLETS COUNT | 15 |
| LOW ENERGY FIXED LIGHT COUNT | 15 |
| UPRN | 100022792179 |
| UPRN SOURCE | Energy Assessor |
| REPORT TYPE | 2 |
| Source file | certificates-2025.csv |
| COUNTRY | England |
| REGION | E12000007 |
| Address display | — |
| Nation | ew |