Energy Performance Certificate
38 The Polygon
SO15 4BN
Southampton
Current
E
43
Potential
C
76
📅 Upcoming Regulation Change — Plan Ahead
The government has proposed raising the minimum EPC standard to C by 2028 for new rental tenancies and 2030 for all tenancies. This E-rated property would need to improve by two bands to comply. Acting now costs less and avoids deadline pressure.
Now
E
Current rating
Target (2028)
C
Minimum required
Achievable
C
With improvements
Running Costs: How This Property Compares
This Property
£4,066
estimated per year
UK Average
£1,800
per year
After Improvements
£1,885
potential per year
This property costs approximately £2,266 more per year than the UK average. Improvements could save up to £2,181 annually.
💰 Grants & Schemes Available
🏠 ECO4 Scheme
Free
Free insulation & heating for eligible households on benefits or low income.
Check Eligibility →How to Improve This E-Rated Property to a C
With targeted upgrades, this property could reach C — saving up to £2,181/year and meeting the proposed 2028 rental standard. Improvements are ranked by return on investment.
Showing quick wins with fastest payback first
💰 Save £3,781/year
With 4 selected upgrades
Future Energy Price Simulator
Drag to see how rising prices affect your savings
Your Savings Today
£3,781/yr
£37,810 over 10 years
Move slider to see
£3,781/yr
£37,810 over 10 years
Build Your Upgrade Plan
Sorted by best return on investment (quick wins first)
Loft Insulation
Your roof is rated Very Poor. Quickest payback of any upgrade — top up to 270mm.
Air Source Heat Pump
Ultra-efficient heating with £7,500 government grant. OVO: MCS certified installation.
Solar Panels + Battery
Your house is ideal for solar. OVO: UK's #1 green energy supplier.
External Wall Insulation
Your walls are rated Very Poor. External insulation can dramatically cut heat loss.
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About This E-Rated Property
This semi-detached house is located in Southampton, SO15 4BN. The property offers 409m² (4402 sq ft) of generously-sized living space with 21 habitable rooms. It is a characterful interwar or early 20th century home. The property has an EPC rating of E (43/100), which is below average but still meets minimum rental requirements. 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 solid walls lack insulation. Solid wall insulation (external or internal) typically costs £8,000-£14,000 but can reduce heat loss by up to 35% and improve your EPC rating by 1-2 bands. The flat roof has poor insulation. Flat roof insulation is more complex but essential for preventing heat loss and condensation issues, typically costing £1,000-£3,000 depending on access and method. Double glazing is installed, though the efficiency rating suggests older units. Modern low-E double glazing can be up to 40% more efficient than units installed before 2002. Estimated annual energy costs are £4066, comprising £3438 for heating, £371 for hot water, and £257 for lighting. The property produces 21.0 tonnes of CO2 per year, which is high for a UK home.
Energy Efficiency Rating
📊 Official EPC Register DataCurrent Rating
Achievable Rating
With recommended improvements
Based on assessment dated 21 Jun 2021
Building Elements — Improvement Opportunities
Poor and average-rated elements are your biggest opportunities to raise the EPC score and cut bills.
🧱 Walls
Solid brick, as built, no insulation (assumed)
🏗️ Roof
Flat, limited insulation (assumed)
🪟 Windows
Mostly double glazing
📦 Floor
Suspended, no insulation (assumed)
🔥 Heating
Boiler and radiators, mains gas
🚿 Hot Water
NaN
💡 Lighting
45.0% low energy — Low energy lighting in 45% of fixed outlets
Property Information
Full Address
38 The Polygon
SO15 4BN
Southampton
Property Type
House
Semi-Detached
Construction Age
England and Wales: 1900-1929
Floor Area
409.0 m²
21.0 total rooms
CO₂ Emissions
21.0 tonnes/year
Energy Consumption
296 kWh/m²/year
E-Rated Properties in Southampton
Southampton has a mix of older and newer housing stock. E-rated properties in this area typically pre-date modern insulation standards but are strong candidates for improvement — particularly insulation and heating system upgrades, which can lift ratings by two or more bands.
Annual Running Costs — Current vs Potential
🔥 Heating
Boiler and radiators, mains gas
£3438 /yr
Save £1902/yr
🚿 Hot Water
£371 /yr
Save £187/yr
💡 Lighting
45.0% low energy
£257 /yr
Save £92/yr
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Broadband & Connectivity
Average download speed: 69 Mbps
Download Speed
Upload Speed
Available Providers
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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More Properties in the SO15 Area
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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.
Data Sources: UK Energy Performance Certificate Register, HM Land Registry Price Paid Data, Police.uk crime statistics.
Public sector information licensed under the Open Government Licence v3.0.