Energy Performance Certificate
81 William Street, Ystrad, CF41 7QY
Energy rating
Current: 96 A | Potential: 96 A
Environmental impact (CO₂)
Current: 100
| Potential: 100
| Field | Value |
|---|---|
| LMK KEY | 0360-3095-1160-2726-3165 |
| ADDRESS1 | 81 William Street |
| ADDRESS2 | Ystrad |
| ADDRESS3 | — |
| POSTCODE | CF41 7QY |
| BUILDING REFERENCE NUMBER | — |
| CURRENT ENERGY RATING | A |
| POTENTIAL ENERGY RATING | A |
| CURRENT ENERGY EFFICIENCY | 96 |
| POTENTIAL ENERGY EFFICIENCY | 96 |
| PROPERTY TYPE | House |
| BUILT FORM | Semi-Detached |
| INSPECTION DATE | 2026-06-25 |
| LOCAL AUTHORITY | W06000016 |
| CONSTITUENCY | W07000107 |
| COUNTY | — |
| LODGEMENT DATE | 2026-06-25 |
| TRANSACTION TYPE | None of the above |
| ENVIRONMENT IMPACT CURRENT | 100 |
| ENVIRONMENT IMPACT POTENTIAL | 100 |
| ENERGY CONSUMPTION CURRENT | 15 |
| ENERGY CONSUMPTION POTENTIAL | 15 |
| CO2 EMISSIONS CURRENT | 0.0 |
| CO2 EMISS CURR PER FLOOR AREA | 0.2 |
| CO2 EMISSIONS POTENTIAL | 0.0 |
| LIGHTING COST CURRENT | 77 |
| LIGHTING COST POTENTIAL | 77 |
| HEATING COST CURRENT | 551 |
| HEATING COST POTENTIAL | 551 |
| HOT WATER COST CURRENT | 290 |
| HOT WATER COST POTENTIAL | 290 |
| TOTAL FLOOR AREA | 125 |
| ENERGY TARIFF | standard tariff |
| MAINS GAS FLAG | — |
| FLOOR LEVEL | — |
| FLAT TOP STOREY | N |
| FLAT STOREY COUNT | 3 |
| MAIN HEATING CONTROLS | Programmer, room thermostat and TRVs |
| MULTI GLAZE PROPORTION | 100 |
| GLAZED TYPE | — |
| GLAZED AREA | — |
| EXTENSION COUNT | — |
| NUMBER HABITABLE ROOMS | — |
| NUMBER HEATED ROOMS | — |
| LOW ENERGY LIGHTING | 100 |
| NUMBER OPEN FIREPLACES | 0 |
| HOTWATER DESCRIPTION | From main system |
| HOT WATER ENERGY EFF | Good |
| HOT WATER ENV EFF | Very Good |
| FLOOR DESCRIPTION | Average thermal transmittance 0.11 W/m²K |
| FLOOR ENERGY EFF | Very Good |
| FLOOR ENV EFF | Very Good |
| WINDOWS DESCRIPTION | High performance glazing |
| WINDOWS ENERGY EFF | Very Good |
| WINDOWS ENV EFF | Very Good |
| WALLS DESCRIPTION | Average thermal transmittance 0.12 W/m²K |
| WALLS ENERGY EFF | Very Good |
| WALLS ENV EFF | Very Good |
| SECONDHEAT DESCRIPTION | None |
| SHEATING ENERGY EFF | N/A |
| SHEATING ENV EFF | N/A |
| ROOF DESCRIPTION | Average thermal transmittance 0.11 W/m²K |
| ROOF ENERGY EFF | Very Good |
| ROOF ENV EFF | Very Good |
| MAINHEAT DESCRIPTION | Air source heat pump, radiators, electric |
| MAINHEAT ENERGY EFF | Good |
| MAINHEAT ENV EFF | Very Good |
| MAINHEATCONT DESCRIPTION | Programmer, room thermostat and TRVs |
| MAINHEATC ENERGY EFF | Good |
| MAINHEATC ENV EFF | Good |
| LIGHTING DESCRIPTION | Excellent lighting efficiency |
| LIGHTING ENERGY EFF | Very Good |
| LIGHTING ENV EFF | Very Good |
| MAIN FUEL | Electricity: electricity, unspecified tariff |
| WIND TURBINE COUNT | — |
| HEAT LOSS CORRIDOR | — |
| UNHEATED CORRIDOR LENGTH | — |
| FLOOR HEIGHT | 2.42 |
| PHOTO SUPPLY | — |
| SOLAR WATER HEATING FLAG | — |
| MECHANICAL VENTILATION | — |
| ADDRESS | 81 William Street, Ystrad |
| LOCAL AUTHORITY LABEL | Rhondda Cynon Taf |
| CONSTITUENCY LABEL | Rhondda and Ogmore |
| POSTTOWN | PENTRE |
| CONSTRUCTION AGE BAND | 2026 |
| LODGEMENT DATETIME | 2026-06-25 13:45:19 |
| TENURE | unknown |
| FIXED LIGHTING OUTLETS COUNT | 17 |
| LOW ENERGY FIXED LIGHT COUNT | 17 |
| UPRN | 10024277544 |
| UPRN SOURCE | Address Matched |
| REPORT TYPE | 3 |
| Source file | certificates-2026.csv |
| COUNTRY | Wales |
| REGION | W99999999 |
| Address display | — |
| Nation | ew |