At a Glance
This semi-detached maisonette is located in SWANSEA, SA1 6EJ. The property offers 67m² (721 sq ft) of modest-sized living space with 3 habitable rooms. It is a characterful interwar or early 20th century home. With an EPC rating of D (56/100), this property is around the UK average for energy efficiency. With recommended improvements, it could achieve a C rating (76/100). The gas central heating system has good efficiency, indicating a relatively modern, well-maintained boiler. The walls feature cavity wall insulation for improved thermal efficiency. The pitched roof lacks adequate insulation. Topping up loft insulation to 270mm (the recommended depth) typically costs £300-£500 and could save £150-£250 annually, with the investment often paying for itself within 2-3 years. Double glazing is installed throughout the property, providing good thermal and acoustic insulation. Estimated annual energy costs are £806, comprising £661 for heating, £92 for hot water, and £53 for lighting. The property produces 3.7 tonnes of CO2 per year, which is low for a UK home. For landlords: This rental property with a D rating is positioned above the current minimum standard. With proposed changes to require a C rating by 2028, modest improvements now could future-proof your compliance.
With an energy efficiency score of 56/100, this SWANSEA property is around the national average for UK homes. Annual energy costs of £806 are approximately £994 below the UK average of £1800, representing significant savings. At 3.7 tonnes of CO2 per year, emissions are below the UK average of 4.5 tonnes.
Data source: Comparisons based on UK national statistics from the Department for Energy Security and Net Zero.This property is located in the SA1 postcode district.
National Ranking: With an EPC score of 56/100, this property is average and performs better than approximately 45% of UK homes for energy efficiency.
Top 55% nationally
Energy Costs: £84/year more than the SWANSEA average
Current Rating
Potential Rating
With recommended improvements
Based on assessment dated 7 Feb 2019
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Full Address
23, Heathfield
SA1 6EJ
SWANSEA
Property Type
Maisonette
Semi-Detached
Construction Age
England and Wales: 1930-1949
Floor Area
67.0 m²
3.0 total rooms
3.0 heated
Tenure
rental (private)
Efficiency Score
56 / 100
Potential: 76
CO₂ Emissions
3.7 tonnes/year
56 kg/m²
Energy Consumption
318 kWh/m²/year
Last Inspected
7 Feb 2019
none of the above
SWANSEA is situated in Swansea, Wales. Properties in SWANSEA have an average EPC rating of D (score 60/100). The SA1 postcode district contains over 21900 registered properties. Built during the mid-20th century suburban expansion, this property reflects the housing developments common to the SWANSEA area.
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Heating
Boiler and radiators, mains gas
£661.0/yr
Save £375/yr
Hot Water
£92.0/yr
Lighting
100.0% low energy
£53.0/yr
Walls
Cavity wall, as built, no insulation (assumed)
Roof
Pitched, no insulation (assumed)
Windows
Fully double glazed
Floor
(another dwelling below)
Heating System
Boiler and radiators, mains gas
Main Fuel
mains gas (not community)
Lighting
Low energy lighting in all fixed outlets
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£823/yr
£8,230 over 10 years
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£823/yr
£8,230 over 10 years
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Your roof is rated Very Poor. Top up to 270mm for best results.
Your walls are rated Poor. Cavity fill is quick and cost-effective.
Ultra-efficient heating with £7,500 government grant. OVO: MCS certified installation.
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See how this property compares to national averages. Explore energy efficiency trends, top-rated areas, and comprehensive UK property statistics.
View UK Property Insights →Within 3 miles of this property
Last inspected: May 2023
Last inspected: Mar 2023
Last inspected: Nov 2011
Last inspected: Apr 2019
Last inspected: May 2023
Last inspected: Nov 2019
Last inspected: Mar 2023
Last inspected: Mar 2023
About school ratings: Ofsted ratings range from Outstanding to Inadequate. These ratings are based on inspections of teaching quality, leadership, pupil behavior, and safety. Note that school catchment areas vary - check with the school or local council for admission details.
Data source: School information from Get Information About Schools (GIAS). Distances are approximate. Always verify school catchment areas directly with the school or local education authority.
Average download speed: 500 Mbps
What do these speeds mean? 10-30 Mbps: Good for browsing and streaming. 30-100 Mbps: Great for multiple users and HD streaming. 100-300 Mbps: Excellent for 4K streaming and gaming. 300+ Mbps: Perfect for large households and heavy internet use.
Data source: Broadband speeds are from Ofcom Connected Nations 2025 report (July 2025 release). Data shows typical speeds available in this postcode area. Actual speeds at this specific property may vary depending on line quality, distance from exchange, and chosen provider. Always verify availability with providers before committing.
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The surrounding area (1-mile radius) experiences higher crime levels
violent crime
238 incidents (33%)
Shoplifting
118 incidents (16%)
Anti-social behaviour
92 incidents (13%)
Public order
77 incidents (11%)
Drugs
46 incidents (6%)
About this data: Crime statistics show incidents reported during April 2026 within a 1-mile radius. Data from Police.uk, updated monthly.
Showing properties in the same postcode. Click to view detailed EPC data for each property.
Explore nearby properties with EPC ratings in the SA1 postcode district
All properties in SA1 • Click to view detailed energy performance data
Based on this property's characteristics, these guides might help you:
Step-by-step guide to upgrading from D-G to A-C ratings. Learn which improvements offer the best value.
Complete cost comparison, government grants up to £7,500, and real running costs for 2025.
Avoid fines up to £30,000. Understand minimum EPC ratings and compliance deadlines.
Understanding A-G ratings, what each means, and how UK properties compare.
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About this EPC: Energy Performance Certificates are valid for 10 years and are required when a property is built, sold, or rented. Learn more about EPCs or book an EPC assessment.
Cost estimates are approximate and actual savings may vary. Find local tradesmen to get accurate quotes for improvements.
Data Sources: This report contains public sector information licensed under the Open Government Licence v3.0.
Data from: UK Energy Performance Certificate Register, HM Land Registry Price Paid Data, and Police.uk crime statistics.