Energy Performance Certificate
40 Byfield Road, TW7 7AF
Energy rating
Current: 69 C | Potential: 73 C
Environmental impact (CO₂)
Current: 69
| Potential: 75
| Field | Value |
|---|---|
| LMK KEY | 3236-3929-2500-0041-7202 |
| ADDRESS1 | 40 Byfield Road |
| ADDRESS2 | — |
| ADDRESS3 | — |
| POSTCODE | TW7 7AF |
| BUILDING REFERENCE NUMBER | — |
| CURRENT ENERGY RATING | C |
| POTENTIAL ENERGY RATING | C |
| CURRENT ENERGY EFFICIENCY | 69 |
| POTENTIAL ENERGY EFFICIENCY | 73 |
| PROPERTY TYPE | Maisonette |
| BUILT FORM | Not Recorded |
| INSPECTION DATE | 2026-01-09 |
| LOCAL AUTHORITY | E09000018 |
| CONSTITUENCY | E14001124 |
| COUNTY | — |
| LODGEMENT DATE | 2026-01-10 |
| TRANSACTION TYPE | Rental |
| ENVIRONMENT IMPACT CURRENT | 69 |
| ENVIRONMENT IMPACT POTENTIAL | 75 |
| ENERGY CONSUMPTION CURRENT | 199 |
| ENERGY CONSUMPTION POTENTIAL | 160 |
| CO2 EMISSIONS CURRENT | 2.1 |
| CO2 EMISS CURR PER FLOOR AREA | 36 |
| CO2 EMISSIONS POTENTIAL | 1.7 |
| LIGHTING COST CURRENT | 50 |
| LIGHTING COST POTENTIAL | 50 |
| HEATING COST CURRENT | 637 |
| HEATING COST POTENTIAL | 497 |
| HOT WATER COST CURRENT | 163 |
| HOT WATER COST POTENTIAL | 163 |
| TOTAL FLOOR AREA | 58 |
| ENERGY TARIFF | Single |
| MAINS GAS FLAG | Y |
| FLOOR LEVEL | 3 |
| FLAT TOP STOREY | Y |
| FLAT STOREY COUNT | 1 |
| MAIN HEATING CONTROLS | Programmer, TRVs and bypass |
| MULTI GLAZE PROPORTION | 100 |
| GLAZED TYPE | — |
| GLAZED AREA | — |
| EXTENSION COUNT | 0 |
| NUMBER HABITABLE ROOMS | 2 |
| NUMBER HEATED ROOMS | 2 |
| LOW ENERGY LIGHTING | 100 |
| NUMBER OPEN FIREPLACES | — |
| HOTWATER DESCRIPTION | From main system |
| HOT WATER ENERGY EFF | Good |
| HOT WATER ENV EFF | Good |
| FLOOR DESCRIPTION | (another dwelling below) |
| FLOOR ENERGY EFF | N/A |
| FLOOR ENV EFF | N/A |
| WINDOWS DESCRIPTION | Fully double glazed |
| WINDOWS ENERGY EFF | Poor |
| WINDOWS ENV EFF | Poor |
| WALLS DESCRIPTION | Cavity wall, as built, partial insulation (assumed) |
| WALLS ENERGY EFF | Average |
| WALLS ENV EFF | Average |
| SECONDHEAT DESCRIPTION | None |
| SHEATING ENERGY EFF | N/A |
| SHEATING ENV EFF | N/A |
| ROOF DESCRIPTION | Pitched, insulated (assumed) |
| ROOF ENERGY EFF | Average |
| ROOF ENV EFF | Average |
| MAINHEAT DESCRIPTION | Boiler and radiators, mains gas |
| MAINHEAT ENERGY EFF | Good |
| MAINHEAT ENV EFF | Good |
| MAINHEATCONT DESCRIPTION | Programmer, TRVs and bypass |
| MAINHEATC ENERGY EFF | Average |
| MAINHEATC ENV EFF | Average |
| LIGHTING DESCRIPTION | Good lighting efficiency |
| LIGHTING ENERGY EFF | Good |
| LIGHTING ENV EFF | Good |
| MAIN FUEL | mains gas (not community) |
| WIND TURBINE COUNT | 0 |
| HEAT LOSS CORRIDOR | unheated corridor |
| UNHEATED CORRIDOR LENGTH | 4.02 |
| FLOOR HEIGHT | 2.4 |
| PHOTO SUPPLY | 0 |
| SOLAR WATER HEATING FLAG | N |
| MECHANICAL VENTILATION | natural |
| ADDRESS | 40 Byfield Road |
| LOCAL AUTHORITY LABEL | Hounslow |
| CONSTITUENCY LABEL | Brentford and Isleworth |
| POSTTOWN | ISLEWORTH |
| CONSTRUCTION AGE BAND | England and Wales: 1976-1982 |
| LODGEMENT DATETIME | 2026-01-10 18:08:26 |
| TENURE | owner-occupied |
| FIXED LIGHTING OUTLETS COUNT | 9 |
| LOW ENERGY FIXED LIGHT COUNT | 9 |
| UPRN | 100021567107 |
| UPRN SOURCE | Energy Assessor |
| REPORT TYPE | 2 |
| Source file | certificates-2026.csv |
| COUNTRY | England |
| REGION | E12000007 |
| Address display | — |
| Nation | ew |