Energy Performance Certificate
99 Willian Way, SG6 2HY
Energy rating
Current: 37 F | Potential: 83 B
Environmental impact (CO₂)
Current: 31
| Potential: 80
| Field | Value |
|---|---|
| LMK KEY | 0116-3065-2002-0809-8902 |
| ADDRESS1 | 99 Willian Way |
| ADDRESS2 | — |
| ADDRESS3 | — |
| POSTCODE | SG6 2HY |
| BUILDING REFERENCE NUMBER | — |
| CURRENT ENERGY RATING | F |
| POTENTIAL ENERGY RATING | B |
| CURRENT ENERGY EFFICIENCY | 37 |
| POTENTIAL ENERGY EFFICIENCY | 83 |
| PROPERTY TYPE | House |
| BUILT FORM | Detached |
| INSPECTION DATE | 2025-01-09 |
| LOCAL AUTHORITY | E07000099 |
| CONSTITUENCY | E14001393 |
| COUNTY | — |
| LODGEMENT DATE | 2025-01-10 |
| TRANSACTION TYPE | Marketed sale |
| ENVIRONMENT IMPACT CURRENT | 31 |
| ENVIRONMENT IMPACT POTENTIAL | 80 |
| ENERGY CONSUMPTION CURRENT | 468 |
| ENERGY CONSUMPTION POTENTIAL | 110 |
| CO2 EMISSIONS CURRENT | 8.7 |
| CO2 EMISS CURR PER FLOOR AREA | 83 |
| CO2 EMISSIONS POTENTIAL | 2.1 |
| LIGHTING COST CURRENT | 180 |
| LIGHTING COST POTENTIAL | 116 |
| HEATING COST CURRENT | 2055 |
| HEATING COST POTENTIAL | 779 |
| HOT WATER COST CURRENT | 295 |
| HOT WATER COST POTENTIAL | 109 |
| TOTAL FLOOR AREA | 105 |
| ENERGY TARIFF | dual |
| MAINS GAS FLAG | Y |
| FLOOR LEVEL | — |
| FLAT TOP STOREY | N |
| FLAT STOREY COUNT | 2 |
| MAIN HEATING CONTROLS | Programmer, no room thermostat |
| MULTI GLAZE PROPORTION | 0 |
| GLAZED TYPE | not defined |
| GLAZED AREA | Normal |
| EXTENSION COUNT | 0 |
| NUMBER HABITABLE ROOMS | 7 |
| NUMBER HEATED ROOMS | 7 |
| LOW ENERGY LIGHTING | 43 |
| NUMBER OPEN FIREPLACES | 0 |
| HOTWATER DESCRIPTION | From main system |
| HOT WATER ENERGY EFF | Average |
| HOT WATER ENV EFF | Average |
| FLOOR DESCRIPTION | Solid, no insulation (assumed) |
| 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 | Cavity wall, as built, no insulation (assumed) |
| WALLS ENERGY EFF | Poor |
| WALLS ENV EFF | Poor |
| SECONDHEAT DESCRIPTION | Room heaters, mains gas |
| SHEATING ENERGY EFF | N/A |
| SHEATING ENV EFF | N/A |
| ROOF DESCRIPTION | Pitched, 25 mm loft insulation |
| ROOF ENERGY EFF | Poor |
| ROOF ENV EFF | Poor |
| MAINHEAT DESCRIPTION | Boiler and radiators, mains gas |
| MAINHEAT ENERGY EFF | Good |
| MAINHEAT ENV EFF | Good |
| MAINHEATCONT DESCRIPTION | Programmer, no room thermostat |
| MAINHEATC ENERGY EFF | Very Poor |
| MAINHEATC ENV EFF | Very Poor |
| LIGHTING DESCRIPTION | Low energy lighting in 43% of fixed outlets |
| LIGHTING ENERGY EFF | Average |
| LIGHTING ENV EFF | Average |
| MAIN FUEL | mains gas (not community) |
| WIND TURBINE COUNT | 0 |
| HEAT LOSS CORRIDOR | — |
| UNHEATED CORRIDOR LENGTH | — |
| FLOOR HEIGHT | 2.41 |
| PHOTO SUPPLY | 0 |
| SOLAR WATER HEATING FLAG | N |
| MECHANICAL VENTILATION | natural |
| ADDRESS | 99 Willian Way |
| LOCAL AUTHORITY LABEL | North Hertfordshire |
| CONSTITUENCY LABEL | North East Hertfordshire |
| POSTTOWN | LETCHWORTH GARDEN CITY |
| CONSTRUCTION AGE BAND | England and Wales: 1950-1966 |
| LODGEMENT DATETIME | 2025-01-10 18:09:36 |
| TENURE | owner-occupied |
| FIXED LIGHTING OUTLETS COUNT | 14 |
| LOW ENERGY FIXED LIGHT COUNT | 6 |
| UPRN | 100080823096 |
| UPRN SOURCE | Energy Assessor |
| REPORT TYPE | 2 |
| Source file | certificates-2025.csv |
| COUNTRY | England |
| REGION | E12000006 |
| Address display | — |
| Nation | ew |