Energy Performance Certificate
27 St. Stephens Mansions, Mount Stuart Square, CF10 5LQ
Energy rating
Current: 64 D | Potential: 81 B
Environmental impact (CO₂)
Current: 91
| Potential: 91
| Field | Value |
|---|---|
| LMK KEY | 0370-2657-0640-2196-5145 |
| ADDRESS1 | 27 St. Stephens Mansions |
| ADDRESS2 | Mount Stuart Square |
| ADDRESS3 | — |
| POSTCODE | CF10 5LQ |
| BUILDING REFERENCE NUMBER | — |
| CURRENT ENERGY RATING | D |
| POTENTIAL ENERGY RATING | B |
| CURRENT ENERGY EFFICIENCY | 64 |
| POTENTIAL ENERGY EFFICIENCY | 81 |
| PROPERTY TYPE | Flat |
| BUILT FORM | Not Recorded |
| INSPECTION DATE | 2026-04-13 |
| LOCAL AUTHORITY | W06000015 |
| CONSTITUENCY | W07000091 |
| COUNTY | — |
| LODGEMENT DATE | 2026-04-14 |
| TRANSACTION TYPE | Marketed sale |
| ENVIRONMENT IMPACT CURRENT | 91 |
| ENVIRONMENT IMPACT POTENTIAL | 91 |
| ENERGY CONSUMPTION CURRENT | 110 |
| ENERGY CONSUMPTION POTENTIAL | 107 |
| CO2 EMISSIONS CURRENT | 0.7 |
| CO2 EMISS CURR PER FLOOR AREA | 10 |
| CO2 EMISSIONS POTENTIAL | 0.6 |
| LIGHTING COST CURRENT | 49 |
| LIGHTING COST POTENTIAL | 57 |
| HEATING COST CURRENT | 604 |
| HEATING COST POTENTIAL | 380 |
| HOT WATER COST CURRENT | 633 |
| HOT WATER COST POTENTIAL | 378 |
| TOTAL FLOOR AREA | 66 |
| ENERGY TARIFF | Single |
| MAINS GAS FLAG | N |
| FLOOR LEVEL | 2 |
| FLAT TOP STOREY | N |
| FLAT STOREY COUNT | 1 |
| MAIN HEATING CONTROLS | Programmer and appliance thermostats |
| MULTI GLAZE PROPORTION | 100 |
| GLAZED TYPE | — |
| GLAZED AREA | — |
| EXTENSION COUNT | 0 |
| NUMBER HABITABLE ROOMS | 3 |
| NUMBER HEATED ROOMS | 3 |
| LOW ENERGY LIGHTING | 100 |
| NUMBER OPEN FIREPLACES | — |
| HOTWATER DESCRIPTION | Electric immersion, standard tariff |
| HOT WATER ENERGY EFF | Very Poor |
| HOT WATER ENV EFF | Very Good |
| FLOOR DESCRIPTION | (another dwelling below) |
| FLOOR ENERGY EFF | N/A |
| FLOOR ENV EFF | N/A |
| WINDOWS DESCRIPTION | Fully double glazed |
| WINDOWS ENERGY EFF | Very Poor |
| WINDOWS ENV EFF | Very Poor |
| WALLS DESCRIPTION | System built, as built, insulated (assumed) |
| WALLS ENERGY EFF | Good |
| WALLS ENV EFF | Good |
| 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 | Room heaters, electric |
| MAINHEAT ENERGY EFF | Very Poor |
| MAINHEAT ENV EFF | Very Good |
| MAINHEATCONT DESCRIPTION | Programmer and appliance thermostats |
| MAINHEATC ENERGY EFF | Good |
| MAINHEATC ENV EFF | Good |
| LIGHTING DESCRIPTION | Good lighting efficiency |
| LIGHTING ENERGY EFF | Good |
| LIGHTING ENV EFF | Good |
| MAIN FUEL | electricity (not community) |
| WIND TURBINE COUNT | 0 |
| HEAT LOSS CORRIDOR | unheated corridor |
| UNHEATED CORRIDOR LENGTH | 11.7 |
| FLOOR HEIGHT | 2.4 |
| PHOTO SUPPLY | 0 |
| SOLAR WATER HEATING FLAG | N |
| MECHANICAL VENTILATION | natural |
| ADDRESS | 27 St. Stephens Mansions, Mount Stuart Square |
| LOCAL AUTHORITY LABEL | Cardiff |
| CONSTITUENCY LABEL | Cardiff South and Penarth |
| POSTTOWN | CARDIFF |
| CONSTRUCTION AGE BAND | England and Wales: 1991-1995 |
| LODGEMENT DATETIME | 2026-04-14 15:54:58 |
| TENURE | unknown |
| FIXED LIGHTING OUTLETS COUNT | 14 |
| LOW ENERGY FIXED LIGHT COUNT | 14 |
| UPRN | 10003564749 |
| UPRN SOURCE | Energy Assessor |
| REPORT TYPE | 2 |
| Source file | certificates-2026.csv |
| COUNTRY | Wales |
| REGION | W99999999 |
| Address display | — |
| Nation | ew |