Energy Performance Certificate
25 Arethusa House, Gunwharf Quays, PO1 3TQ
Energy rating
Current: 73 C | Potential: 74 C
Environmental impact (CO₂)
Current: 93
| Potential: 93
| Field | Value |
|---|---|
| LMK KEY | 2175-3957-5202-6515-7204 |
| ADDRESS1 | 25 Arethusa House |
| ADDRESS2 | Gunwharf Quays |
| ADDRESS3 | — |
| POSTCODE | PO1 3TQ |
| BUILDING REFERENCE NUMBER | — |
| CURRENT ENERGY RATING | C |
| POTENTIAL ENERGY RATING | C |
| CURRENT ENERGY EFFICIENCY | 73 |
| POTENTIAL ENERGY EFFICIENCY | 74 |
| PROPERTY TYPE | Flat |
| BUILT FORM | Not Recorded |
| INSPECTION DATE | 2025-12-23 |
| LOCAL AUTHORITY | E06000044 |
| CONSTITUENCY | E14001432 |
| COUNTY | — |
| LODGEMENT DATE | 2025-12-26 |
| TRANSACTION TYPE | Marketed sale |
| ENVIRONMENT IMPACT CURRENT | 93 |
| ENVIRONMENT IMPACT POTENTIAL | 93 |
| ENERGY CONSUMPTION CURRENT | 71 |
| ENERGY CONSUMPTION POTENTIAL | 68 |
| CO2 EMISSIONS CURRENT | 0.6 |
| CO2 EMISS CURR PER FLOOR AREA | 7 |
| CO2 EMISSIONS POTENTIAL | 0.6 |
| LIGHTING COST CURRENT | 71 |
| LIGHTING COST POTENTIAL | 71 |
| HEATING COST CURRENT | 381 |
| HEATING COST POTENTIAL | 381 |
| HOT WATER COST CURRENT | 683 |
| HOT WATER COST POTENTIAL | 636 |
| TOTAL FLOOR AREA | 86 |
| ENERGY TARIFF | Single |
| MAINS GAS FLAG | Y |
| FLOOR LEVEL | 2 |
| FLAT TOP STOREY | N |
| FLAT STOREY COUNT | 1 |
| MAIN HEATING CONTROLS | Programmer, room thermostat and TRVs |
| 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 | Average |
| WINDOWS ENV EFF | Average |
| WALLS DESCRIPTION | Cavity wall, 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 | Boiler and radiators, electric |
| MAINHEAT ENERGY EFF | Very Poor |
| MAINHEAT ENV EFF | Very Good |
| MAINHEATCONT DESCRIPTION | Programmer, room thermostat and TRVs |
| 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 | 13.38 |
| FLOOR HEIGHT | 2.33 |
| PHOTO SUPPLY | 0 |
| SOLAR WATER HEATING FLAG | N |
| MECHANICAL VENTILATION | natural |
| ADDRESS | 25 Arethusa House, Gunwharf Quays |
| LOCAL AUTHORITY LABEL | Portsmouth |
| CONSTITUENCY LABEL | Portsmouth South |
| POSTTOWN | PORTSMOUTH |
| CONSTRUCTION AGE BAND | England and Wales: 2003-2006 |
| LODGEMENT DATETIME | 2025-12-26 16:28:55 |
| TENURE | owner-occupied |
| FIXED LIGHTING OUTLETS COUNT | 34 |
| LOW ENERGY FIXED LIGHT COUNT | 34 |
| UPRN | 1775098297 |
| UPRN SOURCE | Energy Assessor |
| REPORT TYPE | 2 |
| Source file | certificates-2025.csv |
| COUNTRY | England |
| REGION | E12000008 |
| Address display | — |
| Nation | ew |